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Artigos de revistas sobre o tema "Hexahydropyrimidines"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 21 de fevereiro de 2023

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1

Moser, Shasta, Ryan Church, M. Brad Peori e Keith Vaughan. "Triazene derivatives of (1,x)-diazacycloalkanes. Part IV.1 Synthesis and characterization of 1-[2-aryl-1-diazenyl]-3-(3-[2-aryl-1-diazenyl]hexahydro-1-pyrimidinylmethyl)hexahydropyrimidines and 1-(5,5-dimethyl-3-[2-aryl-1-diazenyl]hexahydro-1-pyrimidinylmethyl)-5,5-dimethyl-3-[2-aryl-1-diazenyl]hexahydropyrimidines from the reaction of diazonium salts with mixtures of formaldehyde and 1,3-diaminopropanes". Canadian Journal of Chemistry 83, n.º 8 (1 de agosto de 2005): 1071–83. http://dx.doi.org/10.1139/v05-131.

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Two new series of bistriazenes have been synthesized from a general reaction of diazonium salts with a mixture of a propanediamine and formaldehyde. Such reaction with 1,3-diaminopropane itself affords the 1-[2-aryl-1-diazenyl]-3-(3-[2-aryl-1-diazenyl]hexahydro-1-pyrimidinylmethyl)hexahydropyrimidines (6). 2,2-Dimethyl-1,3-diamino propane reacts in an analogous manner to give the 1-(5,5-dimethyl-3-[2-aryl-1-diazenyl]hexahydro-1-pyrimidinylmethyl)- 5,5-dimethyl-3-[2-aryl-1-diazenyl]hexahydropyrimidines (7). All new compounds have been characterized by IR and NMR spectroscopy, with elemental analysis or high resolution mass spectrometry of most of the new compounds. NMR assignments have been analyzed by a series of DEPT, COSY, and HSQC experiments. One example of each series has been unequivocally characterized by X-ray crystallography. The general conclusion of this study is that alkanediamines with three carbon atoms in the spacer link between the nitrogen atoms give rise to the linear bicyclic molecules of type 18, in contrast to the case of ethylenediamine (spacer link has two carbon atoms), which affords cage-like molecules of type 17.Key words: bistriazene, hexahydropyrimidine, diazonium coupling, formaldehyde, diaminopropane, nuclear magnetic resonance.

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2

Badamshin, A. G., D. R. Latypova e V. A. Dokichev. "Synthesis of Polyfunctionalized Hexahydropyrimidines". Russian Journal of Organic Chemistry 55, n.º 2 (fevereiro de 2019): 168–73. http://dx.doi.org/10.1134/s1070428019020076.

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3

Zelenin, Kirill N., Valeriy V. Alekseyev, Ilya V. Ukraintsev e Igor V. Tselinsky. "2-SUBSTITUTED HEXAHYDROPYRIMIDINES AND THEIR TAUTOMERISM". Organic Preparations and Procedures International 30, n.º 1 (fevereiro de 1998): 53–61. http://dx.doi.org/10.1080/00304949809355259.

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4

Katritzky, Alan R., Sandeep K. Singh e Hai-Ying He. "Novel Syntheses of Hexahydropyrimidines and Tetrahydroquinazolines". Journal of Organic Chemistry 67, n.º 9 (maio de 2002): 3115–17. http://dx.doi.org/10.1021/jo010927x.

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5

Luk'yanov, O. A., G. V. Pokhvisneva e T. V. Ternikova. "N,N?-Diacylated imidazolidines and hexahydropyrimidines". Russian Chemical Bulletin 43, n.º 8 (agosto de 1994): 1376–80. http://dx.doi.org/10.1007/bf00703698.

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6

Farrell, Joshua R., Jonathan Niconchuk, Christine S. Higham e Brittany W. Bergeron. "Phenol derivatized hexahydropyrimidines prepared from Mannich condensations". Tetrahedron Letters 48, n.º 45 (novembro de 2007): 8034–36. http://dx.doi.org/10.1016/j.tetlet.2007.09.038.

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7

Shafikova, E. A., D. V. Petrov, T. A. Sapozhnikova, N. J. Baschenko e V. A. Dokichev. "Synthesis of norbornane series tetra- and hexahydropyrimidines". Chemistry of Heterocyclic Compounds 45, n.º 6 (junho de 2009): 685–90. http://dx.doi.org/10.1007/s10593-009-0328-1.

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8

Tingley, Reid, M. Brad Peori, Ryan Church e Keith Vaughan. "Triazene derivatives of (1,x)-diazacycloalkanes. Part V.1 Synthesis and characterization of 4-ethyl-3-({6-ethyl-3-[2-aryl-1-diazenyl]hexahydro-1-pyrimidinyl}methyl)-1-[2-aryl-1-diazenyl)hexa- hydropyrimidines from the reaction of diazonium salts with mixtures of formaldehyde and 1,3-diaminopentane". Canadian Journal of Chemistry 83, n.º 10 (1 de outubro de 2005): 1799–807. http://dx.doi.org/10.1139/v05-192.

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A new series of bistriazenes has been synthesized from a general reaction of diazonium salts with a mixture of 1,3-diaminopentane (DYTEK® EP diamine) and formaldehyde, which affords the 4-ethyl-3-({6-ethyl-3-[2-aryl-1-diazenyl]hexahydro-1-pyrimidinyl}methyl)-1-[2-aryl-1-diazenyl]hexahydropyrimidines (1). Each of the molecules of type 1 is built up of two equivalent 3-(aryldiazenyl)-6-ethylhexahydro-1-pyrimidinyl groups attached to a central methylene group. The importance of this study is in part due to the fact that the formaldehyde1,3-diaminopentane system has not previously been investigated. All new compounds have been characterized by IR and NMR spectroscopy, with elemental analysis for selected compounds; one example from the series has been unequivocally characterized by X-ray crystallography. Although analysis of the NMR spectra is made somewhat difficult because of broadness and coalescence of signals due to the rotational dynamics of the NN single bonds, it is possible to fully assign the proton spectra of all compounds and to detect 94% of all carbon signals. The fine structure within the proton spectra illustrate the diastereotopic nature of the methylene group protons because of the presence of a stereocenter in each hexahydropyrimidine ring. The general conclusion of this study is that alkanediamines with three carbon atoms in the spacer link between the nitrogen atoms give rise to the linear bicyclic molecules of type 1, 2, and 3, in contrast to the case of ethylenediamine (spacer link has two carbon atoms), which affords molecules of type 7 that exemplify the bridged bicyclic bistriazene structure. The new compounds of series 1 represent an extension of a broad ranging study of the synthesis of new bistriazene derivatives of (1,x)-diazacycloalkanes.Key words: triazene, diazonium coupling, hexahydropyrimidine, diaminopentane, diazacycloalkanes, stereocenter, diastereotopic protons.

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9

Bergeron, Raymond J., e Howard W. Seligsohn. "Hexahydropyrimidines as masked spermidine vectors in drug delivery". Bioorganic Chemistry 14, n.º 4 (dezembro de 1986): 345–55. http://dx.doi.org/10.1016/0045-2068(86)90001-5.

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10

LUK'YANOV, O. A., G. V. POKHVISNEVA e T. V. TERNIKOVA. "ChemInform Abstract: N,N′-Diacylated Imidazolidines and Hexahydropyrimidines." ChemInform 26, n.º 12 (18 de agosto de 2010): no. http://dx.doi.org/10.1002/chin.199512067.

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11

ZELENIN, K. N., V. V. ALEKSEYEV, I. V. UKRAINTSEV e I. V. TSELINSKY. "ChemInform Abstract: 2-Substituted Hexahydropyrimidines and Their Tautomerism." ChemInform 29, n.º 24 (22 de junho de 2010): no. http://dx.doi.org/10.1002/chin.199824134.

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12

Katritzky, Alan R., Sandeep K. Singh e Hai-Ying He. "ChemInform Abstract: Novel Syntheses of Hexahydropyrimidines and Tetrahydroquinazolines." ChemInform 33, n.º 52 (18 de maio de 2010): no. http://dx.doi.org/10.1002/chin.200252148.

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13

Janati, Fatemeh, Majid M. Heravi e Ahmad Mirshokraie. "Superparamagnetic Iron Oxide as an Efficient Catalyst for the One-Pot, Solvent-Free Synthesis of 5,5-Disubstituted Hexahydropyrimidines and Their Spiro Analogues". Journal of Chemistry 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/214617.

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Superparamagnetic Fe3O4is shown to act as a very efficient catalyst for the one-pot, three-component synthesis of 5,5-disubstituted hexahydropyrimidines and their spiropiperidines. The catalyst is easily recovered by the use of an external magnet and reused in several reactions without any noticeable loss of activity. The products are obtained in short time and good purity upon separation of the catalyst and evaporation of the volatiles of the reaction mixture.

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14

KNABE, J., e J. BIWERSI. "ChemInform Abstract: Racemates and Enantiomers of 5,5-Disubstituted Hexahydropyrimidines." ChemInform 25, n.º 16 (19 de agosto de 2010): no. http://dx.doi.org/10.1002/chin.199416191.

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15

Göblyös, Anikó, László Lázár e Ferenc Fülöp. "Ring-chain tautomerism of 2-aryl-substituted-hexahydropyrimidines and tetrahydroquinazolines". Tetrahedron 58, n.º 5 (janeiro de 2002): 1011–16. http://dx.doi.org/10.1016/s0040-4020(01)01196-6.

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16

Ahmed, Nayeem, Saima Tarannum e Zeba N. Siddiqui. "Dy/chitosan: a highly efficient and recyclable heterogeneous nano catalyst for the synthesis of hexahydropyrimidines in aqueous media". RSC Advances 5, n.º 63 (2015): 50691–700. http://dx.doi.org/10.1039/c5ra08160b.

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17

Tolpygin, I. E. "Chemosensor activity of 2-(anthracen-9-yl)-substituted imidazolidines and hexahydropyrimidines". Russian Journal of Organic Chemistry 48, n.º 1 (janeiro de 2012): 104–8. http://dx.doi.org/10.1134/s1070428012010162.

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18

Garratt, Peter J., Simon N. Thorn e Roger Wrigglesworth. "Regioselective and enantiospecific synthesis of 6-substituted and 5,6-disubstituted hexahydropyrimidines". Tetrahedron Letters 32, n.º 5 (janeiro de 1991): 691–94. http://dx.doi.org/10.1016/s0040-4039(00)74861-1.

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19

Sosnovskikh, V. Ya, e V. A. Kutsenko. "Synthesis of 2-(2-hydroxyaroylmethylene)hexahydropyrimidines from 2-trichloromethylchromones and trimethylenediamine". Russian Chemical Bulletin 48, n.º 11 (novembro de 1999): 2117–20. http://dx.doi.org/10.1007/bf02494859.

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20

Korbonits, Dezsö, Erzsébet Tóbiás-Héja e Pαl Kolonits. "Ring – Chain Tautomerism of 4-Hydroximino-hexahydropyrimidines Substituted in Position 2". Chemische Berichte 124, n.º 5 (maio de 1991): 1199–202. http://dx.doi.org/10.1002/cber.19911240536.

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21

Zhou, Hui, Hetti Handi Chaminda Lakmal, Jonathan M. Baine, Henry U. Valle, Xue Xu e Xin Cui. "Catalytic [2 + 2 + 2] cycloaddition with indium(iii)-activated formaldimines: a practical and selective access to hexahydropyrimidines and 1,3-diamines from alkenes". Chemical Science 8, n.º 9 (2017): 6520–24. http://dx.doi.org/10.1039/c7sc02576a.

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22

Latypova, D. R. "Mannich-Type Reaction for Synthesis of Hexahydropyrimidines and 3,7-Diazabicyclo[3.3.1]Nonanes". Bashkir chemistry journal 25, n.º 2 (agosto de 2018): 10. http://dx.doi.org/10.17122/bcj-2018-2-10-23.

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23

Lorente, Antonio, José L. Garacia Navio, José C. Lopez Perez e José L. Soto. "A Simple Synthesis of 4-Amino-6-aryl-2-thioxotetra-and -hexahydropyrimidines". Synthesis 1985, n.º 01 (1985): 89–92. http://dx.doi.org/10.1055/s-1985-31121.

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24

Shakirov, R. R., T. V. Dokichev, R. Z. Biglova, N. M. Vlasova, N. Z. Baibulatova e R. F. Talipov. "Methyl nitroacetate and 3-nitropropionate in the synthesis of hexahydropyrimidines and piperidines". Chemistry of Heterocyclic Compounds 44, n.º 1 (janeiro de 2008): 43–49. http://dx.doi.org/10.1007/s10593-008-0011-y.

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25

Pokhvisneva, G. V., e O. A. Luk’yanov. "Synthesis of 2-substituted 1-tosyl-3-(1-tosyliminoalkyl)imidazolidines and-hexahydropyrimidines". Russian Chemical Bulletin 55, n.º 5 (maio de 2006): 903–6. http://dx.doi.org/10.1007/s11172-006-0350-8.

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26

KALYANAM, N., P. C. PARTHASARATHY, L. ANANTHAN, S. G. MANJUNATHA e M. A. LIKHATE. "ChemInform Abstract: Studies on Antiamoebic Compounds. Part 4. Synthesis of Hexahydropyrimidines and Tetrahydroimidazoles." ChemInform 23, n.º 28 (21 de agosto de 2010): no. http://dx.doi.org/10.1002/chin.199228071.

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27

Zohdi, Hussein F., Nora M. Rateb e Sherif M. Elnagdy. "Green synthesis and antimicrobial evaluation of some new trifluoromethyl-substituted hexahydropyrimidines by grinding". European Journal of Medicinal Chemistry 46, n.º 11 (novembro de 2011): 5636–40. http://dx.doi.org/10.1016/j.ejmech.2011.09.036.

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28

Hwang, Jong Yeon, Hee-Young Kim, Suyeon Jo, Eunjung Park, Jihyun Choi, Sunju Kong, Dong-Sik Park et al. "Synthesis and evaluation of hexahydropyrimidines and diamines as novel hepatitis C virus inhibitors". European Journal of Medicinal Chemistry 70 (dezembro de 2013): 315–25. http://dx.doi.org/10.1016/j.ejmech.2013.09.055.

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29

Sosnovskikh, V. Ya, e V. A. Kutsenko. "ChemInform Abstract: Synthesis of 2-(2-Hydroxyaroylmethylene)hexahydropyrimidines from 2-Trichloromethylchromones and Trimethylenediamine." ChemInform 31, n.º 14 (9 de junho de 2010): no. http://dx.doi.org/10.1002/chin.200014136.

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30

GARRATT, P. J., S. N. THORN e R. WRIGGLESWORTH. "ChemInform Abstract: Regioselective and Enantiospecific Synthesis of 6-Substituted and 5,6- Disubstituted Hexahydropyrimidines." ChemInform 22, n.º 50 (22 de agosto de 2010): no. http://dx.doi.org/10.1002/chin.199150159.

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31

Tolpygin, I. E. "ChemInform Abstract: Chemosensor Activity of 2-(Anthracen-9-yl)-Substituted Imidazolidines and Hexahydropyrimidines." ChemInform 43, n.º 29 (21 de junho de 2012): no. http://dx.doi.org/10.1002/chin.201229176.

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32

KORBONITS, D., E. TOBIAS-HEJA e P. KOLONITS. "ChemInform Abstract: Ring-Chain Tautomerism of 4-Hydroximino-hexahydropyrimidines Substituted in Position 2." ChemInform 22, n.º 31 (22 de agosto de 2010): no. http://dx.doi.org/10.1002/chin.199131084.

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33

KORBONITS, D., E. TOBIAS-HEJA, K. SIMON e P. KOLONITS. "ChemInform Abstract: Solvent-Dependent Reversible Rearrangement of 4-(Hydroxyimino) hexahydropyrimidines to 4-Aminotetrahydropyrimidine 3-Oxides." ChemInform 25, n.º 20 (19 de agosto de 2010): no. http://dx.doi.org/10.1002/chin.199420072.

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34

Orelli, Liliana R., María B. García, Isabel A. Perillo, Loris Tonidandel e Pietro Traldi. "A comparison of the electron ionization and electrospray behaviour of some N,N′-disubstituted hexahydropyrimidines". Rapid Communications in Mass Spectrometry 20, n.º 5 (7 de fevereiro de 2006): 823–28. http://dx.doi.org/10.1002/rcm.2375.

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35

Subramaniyan, Vasudevan, Ashok Kumar, Anbarasu Govindaraj e Ganesan Mani. "Crystal structure and DFT analyses of a pentacoordinated PCP pincer nickel(II) complex". Acta Crystallographica Section C Structural Chemistry 75, n.º 6 (21 de maio de 2019): 734–39. http://dx.doi.org/10.1107/s2053229619006211.

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The reaction of NiCl2 with 1,3-bis[(diphenylphosphanyl)methyl]hexahydropyrimidine in the presence of 2,6-dimethylphenyl isocyanide and KPF6 afforded a new pentacoordinated PCP pincer NiII complex, namely {1,3-bis[(diphenylphosphanyl)methyl]hexahydropyrimidin-2-yl-κN 2}(2,6-dimethylphenyl isocyanide-κC)nickel(II) hexafluoridophosphate 0.70-hydrate, [Ni(C9H9N)(C30H30ClN2P2)]PF6·0.7H2O or [NiCl{C(NCH2PPh2)2(CH2)3-κ3 P,C,P′}(Xylyl-NC)]PF6·0.7H2O, in very good yield. Its X-ray structure showed a distorted square-pyramidal geometry and the compound does not undergo dissociation in solution, as shown by variable-temperature NMR and UV–Vis studies. Density functional theory (DFT) calculations provided an insight into the bonding; the nickel dsp 2-hybridized orbitals form the basal plane and the nearly pure p orbital forms the axial bond. This is consistent with the NBO (natural bond orbital) analysis of analogous nickel(II) complexes.

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36

Kireeva, D. R., e A. I. Kamalova. "Synthesis of Hexahydropyrimidines and 1,2,3,4-Tetrahydropyridines by Reaction of Ethyl Benzoylacetate with Formaldehyde and Primary Amines". Russian Journal of Organic Chemistry 56, n.º 10 (outubro de 2020): 1733–37. http://dx.doi.org/10.1134/s1070428020100103.

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37

Berges, David A., Jianmei Fan, Sylvie Devinck e Kendall Mower. "Preference for AxialN-Alkylation of Tetrahydro-1,3-oxazines and Hexahydropyrimidines: Manifestation of a Kinetic Anomeric Effect". Journal of Organic Chemistry 65, n.º 3 (fevereiro de 2000): 889–94. http://dx.doi.org/10.1021/jo991752i.

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38

Dandia, Anshu, Anuj K. Jain e Sonam Sharma. "Indium triflate catalyzed one-pot multicomponent synthesis of spiro-hexahydropyrimidines explained by multiple covalent bond formation". Tetrahedron Letters 53, n.º 39 (setembro de 2012): 5270–74. http://dx.doi.org/10.1016/j.tetlet.2012.07.079.

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39

Maloshitskaya, Olga, Jari Sinkkonen, Vladimir V. Ovcharenko, Kirill N. Zelenin e Kalevi Pihlaja. "Chain-ring-chain tautomerism in 2-aryl-substituted hexahydropyrimidines and 1H-2,3-dihydroperimidines. Does it appear?" Tetrahedron 60, n.º 32 (agosto de 2004): 6913–21. http://dx.doi.org/10.1016/j.tet.2004.05.092.

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40

Shephard, MJ, e MN Paddonrow. "A Caveat Concerning the Use of the AM1 and PM3 Semiempirical Methods in Calculating Conformational Preferences in Acyclic Amines and Saturated Azaheterocycles". Australian Journal of Chemistry 46, n.º 4 (1993): 547. http://dx.doi.org/10.1071/ch9930547.

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A theoretical investigation of the conformational analysis of several acyclic amines, N- alkylated saturated azaheterocycles and alkylcyclohexanes (alkyl = Me, Et, isopropyl, t-butyl) has been carried out by using the MNDO, AM1 and PM3 semiempirical methods. It is found that all three methods correctly predict, qualitatively, the conformational preferences in alkylcyclohexanes, although the PM3 method underestimates the conformational energy for the t-butyl group by as much as 13 kJ/mol. Both AM1 and PM3 overestimate the conformational energy of the nitrogen lone pair to the extent that it exceeds that of the isopropyl group and (in the case of PM3) the t-butyl group, thereby leading to erroneous predictions of favoured conformations in amines and azaheterocycles . Thus, axial N-alkylpiperidines are predicted to be more stable than the equatorial conformers. Thus, application of the AM1 and PM3 methods to the conformational analysis of molecules containing amine functionalities is not recommended. Although the MNDO method gives a qualitative account of the conformational analysis of such molecules, with the exception of hexahydropyridazines and hexahydropyrimidines, the resulting conformational energies and molecular geometries are in poor agreement with experimental data.

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41

Besse, Richard, Peter J. Garratt, Christopher J. Hobbs, Helen M. Rogers, A. Mannan Sueleiman, Christopher S.J. Walpole e Roger Wrigglesworth. "Ring size preference in the intramolecular cyclisation of amines with esters. Synthesis of aminoacid derived hexahydropyrimidines and tetrahydroimidazoles". Tetrahedron 46, n.º 23 (janeiro de 1990): 7803–12. http://dx.doi.org/10.1016/s0040-4020(01)90077-8.

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42

Kar, Purabi, Aparajita Nayak, Y. P. Bhoi e B. G. Mishra. "Preparation and catalytic application of sulfonated PVA-Zr-pillared clay nanocomposite materials towards one pot synthesis of hexahydropyrimidines". Microporous and Mesoporous Materials 223 (março de 2016): 176–86. http://dx.doi.org/10.1016/j.micromeso.2015.11.006.

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43

Dandia, Anshu, Anuj K. Jain e Sonam Sharma. "ChemInform Abstract: Indium Triflate Catalyzed One-Pot Multicomponent Synthesis of Spiro-Hexahydropyrimidines Explained by Multiple Covalent Bond Formation." ChemInform 44, n.º 2 (8 de janeiro de 2013): no. http://dx.doi.org/10.1002/chin.201302147.

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44

Huang, Zhi-Tang, Wei-Xing Gan e Xiao-Jun Wang. "Synthesis and X-ray structure analysis of 2-[cyano(aryl)-methylene]-imidazolidines, -hexahydropyrimidines, and -hexahydro-1H-1,3-diazepines". Journal f�r Praktische Chemie 330, n.º 5 (1988): 724–34. http://dx.doi.org/10.1002/prac.19883300507.

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45

Ahmed, Nayeem, Saima Tarannum e Zeba N. Siddiqui. "ChemInform Abstract: Dy/Chitosan: A Highly Efficient and Recyclable Heterogeneous Nano Catalyst for the Synthesis of Hexahydropyrimidines in Aqueous Media." ChemInform 46, n.º 44 (15 de outubro de 2015): no. http://dx.doi.org/10.1002/chin.201544187.

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46

Saraswathi, K., M. Suresh e A. Pandurangan. "Synthesis, Hirshfeld surface analysis, spectral investigations, DFT calculations, ADME studies and molecular docking of Hexahydropyrimidines derivative against dimeric Apolipoprotein A-IV". Journal of Molecular Structure 1255 (maio de 2022): 132447. http://dx.doi.org/10.1016/j.molstruc.2022.132447.

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BESSE, R., P. J. GARRATT, C. J. HOBBS, H. M. ROGERS, A. M. SUELEIMAN, C. S. J. WALPOLE e R. WRIGGLESWORTH. "ChemInform Abstract: Ring Size Preference in the Intramolecular Cyclisation of Amines with Esters. Synthesis of Amino Acid Derived Hexahydropyrimidines and Tetrahydroimidazoles." ChemInform 22, n.º 9 (23 de agosto de 2010): no. http://dx.doi.org/10.1002/chin.199109085.

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Estilos ABNT, Harvard, Vancouver, APA, etc.

48

Palermo, Valeria, Ángel Sathicq, Thierry Constantieux, Jean Rodríguez, Patricia Vázquez e Gustavo Romanelli. "New Vanadium Keggin Heteropolyacids Encapsulated in a Silica Framework: Recyclable Catalysts for the Synthesis of Highly Substituted Hexahydropyrimidines Under Suitable Conditions". Catalysis Letters 145, n.º 4 (19 de fevereiro de 2015): 1022–32. http://dx.doi.org/10.1007/s10562-015-1498-3.

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Estilos ABNT, Harvard, Vancouver, APA, etc.

49

Huang, Zhi-tang, e Zhi-rong Liu. "Synthesis of 2-(Benzoylmethylene)imidazolidines and -hexahydropyrimidines by Condensation of Ethyl Benzoylacetimidates With 1,2-Ethanediamine or 1,3-Propandiamine, and Some Addition Reactions". Synthesis 1987, n.º 04 (1987): 357–62. http://dx.doi.org/10.1055/s-1987-27942.

Texto completo da fonte

Estilos ABNT, Harvard, Vancouver, APA, etc.

50

Ishar, M. P., Gurmit Singh e Gurpinder Singh. "An Efficient Route to Novel 2-(Salicylmethylidine)imidazolidines and (Salicylmethylidene)hexahydropyrimidines through Reactions of 2-(N-Methylanilino)-3-formylchromone with Aliphatic Diamines". Synlett, n.º 2 (2003): 0256–58. http://dx.doi.org/10.1055/s-2003-36780.

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