Academic literature on the topic 'Chiral Lewis acid'
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Journal articles on the topic "Chiral Lewis acid"
Kim, Yong Hae, Doo Young Jung, So Won Youn, Sam Min Kim, and Doo Han Park. "Dual enantioselective control by heterocycles of (S)-indoline derivatives." Pure and Applied Chemistry 77, no. 12 (January 1, 2005): 2053–59. http://dx.doi.org/10.1351/pac200577122053.
Full textKim, Yong Hae, Sam Min Kim, and So Won Youn. "Asymmetric synthesis by stereocontrol." Pure and Applied Chemistry 73, no. 2 (January 1, 2001): 283–86. http://dx.doi.org/10.1351/pac200173020283.
Full textCantú-Reyes, Margarita, Isabel Alvarado-Beltrán, Ricardo Ballinas-Indilí, Cecilio Álvarez-Toledano, and Marcos Hernández-Rodríguez. "Stereodivergent Mannich reaction of bis(trimethylsilyl)ketene acetals with N-tert-butanesulfinyl imines by Lewis acid or Lewis base activation, a one-pot protocol to obtain chiral β-amino acids." Organic & Biomolecular Chemistry 15, no. 36 (2017): 7705–9. http://dx.doi.org/10.1039/c7ob01853c.
Full textCarlos Dias, Luiz. "Chiral Lewis Acid Catalyzed Ene-Reactions." Current Organic Chemistry 4, no. 3 (March 1, 2000): 305–42. http://dx.doi.org/10.2174/1385272003376274.
Full textOgawa, Chikako, and Shu Kobayashi. "Chiral Lewis Acid Catalysis in Water." Current Organic Synthesis 8, no. 3 (June 1, 2011): 345–55. http://dx.doi.org/10.2174/157017911795529119.
Full textISHIHARA, K., and H. YAMAMOTO. "ChemInform Abstract: Chiral Lewis Acid Catalysts." ChemInform 27, no. 36 (August 5, 2010): no. http://dx.doi.org/10.1002/chin.199636262.
Full textRossi, Sergio, Tiziana Benincori, Laura Maria Raimondi, and Maurizio Benaglia. "3,3′-Bithiophene-Based Chiral Bisphosphine Oxides as Organocatalysts in Silicon-Derived Lewis Acid Mediated Reactions." Synlett 31, no. 06 (January 7, 2020): 535–46. http://dx.doi.org/10.1055/s-0039-1690777.
Full textKobayashi, Shū. "Asymmetric catalysis in aqueous media." Pure and Applied Chemistry 79, no. 2 (January 1, 2007): 235–45. http://dx.doi.org/10.1351/pac200779020235.
Full textHAYASHI, Yujiro, and Koichi NARASAKA. "Chiral lewis acid in catalytic asymmetric reactions." Journal of Synthetic Organic Chemistry, Japan 48, no. 4 (1990): 280–91. http://dx.doi.org/10.5059/yukigoseikyokaishi.48.280.
Full textMcKay, M. Kevin, and James R. Green. "Asymmetric synthesis based on chiral (arene)tricarbonylchromium acetal complexes. Addition reactions to the ortho-formyl complex." Canadian Journal of Chemistry 78, no. 12 (December 1, 2000): 1629–36. http://dx.doi.org/10.1139/v00-150.
Full textDissertations / Theses on the topic "Chiral Lewis acid"
Knol, Jochem. "Chiral Lewis acid catalyzed Diels-Alder reactions." [S.l. : [Groningen : s.n.] ; University of Groningen] [Host], 2008. http://irs.ub.rug.nl/ppn/.
Full textCao, Min. "Enantioselective Transformations Promoted by Cooperative Functions of an Achiral Lewis Acid and a Chiral Lewis Acid:." Thesis, Boston College, 2021. http://hdl.handle.net/2345/bc-ir:109203.
Full textThesis advisor: Amir H. Hoveyda
This dissertation describes the development of cooperative catalyst systems that contain an achiral Lewis acid and a chiral Lewis acid that may have overlapping functions but play their independent roles to promote enantioselective C–C bond formations. Chapter 1 provides a summary of recent advances made in the field of enantioselective cooperative catalysis that served as intellectual foundations for this dissertation research. As it will be discussed in the first chapter, key limitations of cooperative catalysis are: (1) undesirable catalyst deactivation which occurs due to acid/base complexation, (2) requirement for base sensitive pronucleophiles and acid sensitive electrophiles, and (3) poor reaction efficiency. In an effort to overcome these fundamental limitations, we have developed “frustrated” Lewis pair (FLP)-based catalyst systems that consist of potent and sterically encumbered Lewis acids used in pair with bulky N-containing Lewis bases. To demonstrate the potential of the novel FLP catalyst system, we describe our work involving the enantioselective Conia-ene-type cyclization (Chapter 2). In the subsequent chapter (Chapter 3), we discuss the application of the FLP catalysts for enantioselective β-amino C–H functionalization reactions
Thesis (PhD) — Boston College, 2021
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Chemistry
Mahal, R. S. "Preparation and use of chiral borane lewis acids." Thesis, University of Salford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381853.
Full textClapham, Gary. "New Lewis acid promoted Diels-Alder reaction and transition catalysed hydrocarbons." Thesis, University of Exeter, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284618.
Full textMellberg, Annika. "Chiral Carbocations as Lewis Acid Catalysts in Diels-Alder Reactions." Thesis, KTH, Skolan för kemivetenskap (CHE), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-156209.
Full textRisberg, Erik. "Lewis acid Mediated Aza-Diels-Alder Reactions and Asymmetric Alkylations of 2H-azirines." Doctoral thesis, KTH, Chemistry, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3822.
Full textThis thesis describes the use of 2H-azirines, three-membered unsaturatednitrogen-containing heterocycles, as reactive intermediates ina number of Lewis acid promoted alkylations and Diels-Alderreactions providing synthetically useful aziridines.
In order to carry out this investigation a new generalprocedure for the ring closure of vinyl azides, forming theresultant 3-substituted-2H-azirines, was developed applying low boiling solventsin closed reaction vessels at elevated temperatures.
The addition of organolithium reagents in the presence ofcommercially available chiral ligands, to the 3-(2-naphthyl)-2H-azirine was studied, which gave the correspondingaziridines.
Several Lewis acids were shown to catalyze the normalelectron-demand Diels-Alder reaction between 3-alkyl-,3-aromatic-, and 3-ester-substituted 2H-azirines and various dienes. These reactions gave theexpected cycloadducts in moderate yields.
Using a chiral auxiliary high diastereoselectivity wasobtained in the addition of alkyl radicals to a8-phenylmenthyl-substituted 2H-azirine-3-carboxylate. The alkyl radicals weregenerated from the corresponding trialkyl borane and molecularoxygen. Hydroborations and transmetallations were used toprepare these trialkylboranes. Catalytic amounts of CuClincreased the diastereoselectivity in the radical additionreactions.
Attempts were made to explain how the coordination of aLewis acid to the azirine nitrogen atom affects thereactivity/stability of the azirine. DFT calculations and NMRexperiments involving Lewis acid-azirine complexes wereperformed.
Keywords:Enantioselective, diastereoselective, vinylazide, 2H-azirines, aziridines, Lewis acid, chiral ligand,chiral auxiliary, organolithiums, Diels-Alder reaction, alkylradicals, triethylborane.
Lundgren, Stina. "Efficient Synthesis and Analysis of Chiral Cyanohydrins." Doctoral thesis, Stockholm : Kungliga Tekniska högskolan (KTH), 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4315.
Full textRisberg, Erik. "Lewis Acid Mediated Alkylation and Diels-Alder Reactions of 2H-Azirines." Licentiate thesis, KTH, Chemistry, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-1489.
Full textThis thesis describes the use of 2H-azirines as reactivesubstrates in Lewis acid catalysed nucleophilic additions andin the Diels-Alder reaction.A number of carbon nucleophiles have been added to aseries of 2H-azirines in the presence and absence ofBF3·Et2O. 3-(2-Naphthyl)-2H-azirine has been used as amodel substrate in the enantioselective addition oforganolithium reagents to an 2H-azirine.A selection of Lewis acids has been screened for theirpossible use in the normal electron demand Diels-Alder reactionbetween 3-alkyl-, 3-aryl-, and 3- carboxyl-2H-azirines and avariety of dienes. Lewis acid activation was found to shortenreaction times and facilitate lower reaction temperatures.These cycloadditions proceeded with endo selectivity providinga single diastereoisomeric product.DFT calculations of Lewis acid activated 2H-azirineshave been carried out.
Keywords:2H-azirines, Lewis acid activation, chiralligands, organolithium reagents, Diels-Alder reactions,DFT-calculations
Wingstrand, Erica. "New Methods for Chiral Cyanohydrin Synthesis." Doctoral thesis, KTH, Kemi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10205.
Full textQC 20100818
Chang, Yejin. "Enantioselective Transformations of α- and β-Amino C-H Bonds Promoted by Cooperative Actions of Achiral and Chiral Lewis Acid Catalysts:." Thesis, Boston College, 2021. http://hdl.handle.net/2345/bc-ir:109179.
Full textThesis advisor: Amir H. Hoveyda
This dissertation describes the development of cooperative catalyst systems for the regio- and enantio-selective α- and β-amino C-H functionalization of N-alkylamines, inspired by the concepts of frustrated Lewis pairs (FLPs). Prior to this dissertation research, the development of effective and broadly applicable catalytic protocol to transform amino C-H bonds with high enantioselectivity remained as a formidable problem. In Chapter 1, the recent advances in the field of amino C-H functionalization through hydride transfer process that served as intellectual foundations for this dissertation research is presented. As highlighted in the first chapter, key challenges of amino C-H functionalization are: (1) unreactive nature of α, β- and/or γ-amino C-H bonds, (2) requirement for the use of precious metal-based catalysts and external oxidants under acidic/basic and harsh conditions, (3) use of directing groups for regioselectivity, and (4) poor functional group tolerance. Inspired by the unique capability of FLPs to activate otherwise unreactive molecules while disfavoring undesirable acid-base complexation, we have developed a protocol for enantioselective α-amino C-H functionalization of N-alkylamines, where chiral and achiral Lewis acid catalysts work cooperatively (Chapter 2). The application of the cooperative catalyst system comprising of B(C6F5)3, a chiral Lewis acid, and a Brønsted base to the enantioselective β-amino C-H functionalization is described in Chapter 3
Thesis (PhD) — Boston College, 2021
Submitted to: Boston College. Graduate School of Arts and Sciences
Discipline: Chemistry
Books on the topic "Chiral Lewis acid"
H. R. R. De Silva. Lewis-acid catalysed synthesis of chiral 1,2-diols. Manchester: UMIST, 1995.
Find full textMikami, Koichi, ed. Chiral Lewis Acids. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-70806-5.
Full textMlynarski, Jacek, ed. Chiral Lewis Acids in Organic Synthesis. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2017. http://dx.doi.org/10.1002/9783527802142.
Full textMahal, Ravinderjit Singh. Preparation and use of chiral borane Lewis acids. Salford: University of Salford, 1988.
Find full textChiral Lewis Acids. Springer, 2019.
Find full textMikami, Koichi. Chiral Lewis Acids. Springer, 2018.
Find full textChiral Lewis Acids in Organic Synthesis. Wiley & Sons, Limited, John, 2017.
Find full textMlynarski, Jacek. Chiral Lewis Acids in Organic Synthesis. Wiley & Sons, Incorporated, John, 2017.
Find full textMlynarski, Jacek. Chiral Lewis Acids in Organic Synthesis. Wiley & Sons, Incorporated, John, 2017.
Find full textBook chapters on the topic "Chiral Lewis acid"
Yamamoto, Hisashi, Keiji Maruoka, and Kyoji Furuta. "Chiral Lewis Acid Catalysts Organoaluminum and Boron Reagent." In Selectivities in Lewis Acid Promoted Reactions, 281–94. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2464-2_15.
Full textPaterson, Ian. "Aldol Condensations of Ketones Using Chiral Boron Reagents." In Selectivities in Lewis Acid Promoted Reactions, 311. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2464-2_24.
Full textBrill, Marcel, and Steven P. Nolan. "Chiral Carbophilic Gold Lewis Acid Complexes in Enantioselective Catalysis." In Topics in Organometallic Chemistry, 51–90. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/3418_2015_142.
Full textFeng, Xiaoming, Zhen Wang, and Xiaohua Liu. "Chiral Lewis Acid Rare-Earth Metal Complexes in Enantioselective Catalysis." In Topics in Organometallic Chemistry, 147–91. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/3418_2017_1.
Full textShibasaki, Masakatsu, and Naoya Kumagai. "Chiral Bimetallic Lewis Acids." In Topics in Organometallic Chemistry, 27–50. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/3418_2015_153.
Full textWang, Jun, and Xiaoming Feng. "Titanium-Based Chiral Lewis Acids." In Chiral Lewis Acids in Organic Synthesis, 27–57. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2017. http://dx.doi.org/10.1002/9783527802142.ch2.
Full textOllevier, Thierry. "Iron-based Chiral Lewis Acids." In Chiral Lewis Acids in Organic Synthesis, 59–101. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2017. http://dx.doi.org/10.1002/9783527802142.ch3.
Full textKarthikeyan Iyanar and Mukund P. Sibi. "Copper-based Chiral Lewis Acids." In Chiral Lewis Acids in Organic Synthesis, 103–35. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2017. http://dx.doi.org/10.1002/9783527802142.ch4.
Full textBaś, Sebastian, Marcin Szewczyk, and Jacek Mlynarski. "Zinc-based Chiral Lewis Acids." In Chiral Lewis Acids in Organic Synthesis, 137–81. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2017. http://dx.doi.org/10.1002/9783527802142.ch5.
Full textAspinall, Helen C. "Chiral Rare Earth Lewis Acids." In Chiral Lewis Acids in Organic Synthesis, 261–98. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2017. http://dx.doi.org/10.1002/9783527802142.ch8.
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