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Relevant bibliographies by topics / Annulation reactions

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Journal articles

Academic literature on the topic 'Annulation reactions'

Author: Grafiati

Published: 6 September 2023

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Journal articles on the topic "Annulation reactions"

1

Fang, Lei, Alexander Kalin, and Jongbok Lee. "Annulation Reactions for Conjugated Ladder-Type Oligomers." Synlett 29, no. 08 (2018): 993–98. http://dx.doi.org/10.1055/s-0036-1591945.

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Conjugated ladder-type oligomers are a class of important functional organic materials. They possess intriguing properties stemming from their fully fused aromatic backbones. The construction of the ladder-type backbone relies on a ‘ladderization’ step, which may be accomplished through either kinetically or thermodynamically controlled annulation reactions. The attributes of these reactions are discussed, with relevant recent examples. The development of these reactions is key to continued advances and innovation in the field of organic conjugated materials.1 Introduction2 Kinetic Annulations

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2

Song, Ren-Jie, Bin Wei, Ke-Wei Li, Yan-Chen Wu та Shi-Qi Tong. "Radical Strategy for the Transition-Metal-Catalyzed Synthesis of γ-Lactones: A Review". Synthesis 52, № 24 (2020): 3855–65. http://dx.doi.org/10.1055/s-0040-1707835.

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The γ-lactone skeleton is very important component of various natural products, biological molecules, food additives, and perfumes. As a result, much effort has been made towards such compounds. In this review, we summarize recent progress in transition-metal-catalyzed annulation reactions for the formation of γ-lactone derivatives through a radical pathway. Various reagents, such as anhydrides, Togni’s reagent, TMSN3, arenesulfonyl chlorides, arenediazonium salts, dibenzoyl peroxides, O-benzoylhydroxylamine, NFSI, and α-halocarboxylic compounds, used in radical cyclization reactions are descr

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3

Comesse, Sébastien, Ismail Alahyen, Laure Benhamou, Vincent Dalla, and Catherine Taillier. "20 Years of Forging N-Heterocycles from Acrylamides through Domino/Cascade Reactions." Synthesis 53, no. 19 (2021): 3409–39. http://dx.doi.org/10.1055/a-1503-7932.

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AbstractAcrylamides are versatile building blocks that are easily obtained from readily available starting materials. During the last 20 years, these valuable substrates bearing a nucleophilic nitrogen atom and an electrophilic double bond have proven to be efficient domino partners, leading to a wide variety of complex aza-heterocycles of synthetic relevance. In this non-exhaustive review, metal-free and metal-triggered reactions followed by an annulation will be presented; these two approaches allow good modulation of the reactivity of the polyvalent acrylamides.1 Introduction2 Metal-Free An

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4

Gerasyuto, Aleksey I., Zhi-Xiong Ma, Grant S. Buchanan, and Richard P. Hsung. "Establishing the concept of aza-[3 + 3] annulations using enones as a key expansion of this unified strategy in alkaloid synthesis." Beilstein Journal of Organic Chemistry 9 (June 18, 2013): 1170–78. http://dx.doi.org/10.3762/bjoc.9.131.

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A successful enone version of an intramolecular aza-[3 + 3] annulation reaction is described here. Use of piperidinium trifluoroacetate salt as the catalyst and toluene as the solvent appears to be critical for a successful annulation. We also demonstrated for the first time that microwave irradiation can accelerate aza-[3 + 3] annulation reactions. An attempt to expand the scope of the enone aza-[3 + 3] annulation was made in the form of propyleine synthesis as a proof of concept. While synthesis of the enone annulation precursor was successfully accomplished, the annulation proved to be chal

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5

Cardoso, Ana L., and Maria I. L. Soares. "1,3-Dipolar Cycloadditions Involving Allenes: Synthesis of Five-Membered Rings." Current Organic Chemistry 23, no. 27 (2020): 3064–134. http://dx.doi.org/10.2174/1385272823666191203122959.

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The 1,3-dipolar cycloaddition reaction is a powerful and versatile strategy for the synthesis of carbocyclic and heterocyclic five-membered rings. Herein, the most recent developments on the [3+2] cycloaddition reactions using allenes acting either as dipolarophiles or 1,3-dipole precursors, are highlighted. The recent contributions on the phosphine- and transition metal-catalyzed [3+2] annulations involving allenes as substrates are also covered, with the exception of those in which the formation of a 1,3-dipole (or synthetic equivalent) is not invoked. This review summarizes the most relevan

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6

Mao, Guoliang, Qiang Huang, and Congyang Wang. "Rhenium-Catalyzed Annulation Reactions." European Journal of Organic Chemistry 2017, no. 25 (2017): 3549–64. http://dx.doi.org/10.1002/ejoc.201700285.

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7

Jeganmohan, Masilamani, and Pinki Sihag. "Recent Advances in Transition-Metal-Catalyzed C–H Functionalization Reactions Involving Aza/Oxabicyclic Alkenes." Synthesis 53, no. 18 (2021): 3249–62. http://dx.doi.org/10.1055/a-1528-1711.

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AbstractBicyclic alkenes, including oxa- and azabicyclic alkenes, readily undergo activation with facial selectivity in the presence of transition-metal complexes. This is due to the intrinsic angle strain on the carbon–carbon double bonds in such unsymmetrical bicyclic systems. During the past decades considerable progress has been made in the area of ring opening of bicyclic strained rings by employing the concept of C–H activation. This short review comprehensively compiles the various C–H bond activation assisted reactions of oxa- and azabicyclic alkenes, viz., ring-opening reactions, hydr

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8

Li, Yangyan, Xiang Chen, Xiaoming Chen, and Xiao Shen. "Organophosphine-Catalyzed [4C+X] Annulations." Molecules 23, no. 11 (2018): 3022. http://dx.doi.org/10.3390/molecules23113022.

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In recent years, there have been extraordinary developments of organophosphine-catalyzed reactions. This includes progress in the area of [4C+X] annulations, which are of particular interest due to their potential for the rapid construction of 5–8-membered cyclic products. In this short overview, we summarize the remarkable progress, emphasizing reaction mechanisms and key intermediates involved in the processes. The discussion is classified according to the type of electrophilic reactants that acted as C4 synthons in the annulation process, in the order of α-alkyl allenoates, γ-alkyl allenoat

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9

Dillon, John L., Qi Gao, Elizabeth A. Dillon, and Nick Adams. "New annulation reactions of cyclobutenones." Tetrahedron Letters 38, no. 13 (1997): 2231–34. http://dx.doi.org/10.1016/s0040-4039(97)00331-6.

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10

Qian, Hui, Wanxiang Zhao, and Jianwei Sun. "Siloxy Alkynes in Annulation Reactions." Chemical Record 14, no. 6 (2014): 1070–85. http://dx.doi.org/10.1002/tcr.201402042.

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