Copper-Catalyzed Aza-Diels–Alder Reaction and Halogenation: An Approach To Synthesize 7-Halogenated Chromenoquinolines
作者:Xiaoqiang Yu、Jiao Wang、Zhanwei Xu、Yoshinori Yamamoto、Ming Bao
DOI:10.1021/acs.orglett.6b01065
日期:2016.5.20
A new halogenation method to construct halogen-substituted quinoline moieties is described. The Cu-catalyzed intramolecular aza-Diels–Alder reaction and halogenation reaction proceeded smoothly under mild conditions to produce the corresponding 7-chloro-6H-chromeno[4,3-b]quinolines and 7-chloro-6H-thiochromeno[4,3-b]quinolines in satisfactory yields.
描述了构建卤素取代的喹啉部分的新的卤化方法。铜催化的分子内氮杂-Diels-Alder反应和卤化反应在温和条件下平稳进行,生成了相应的7-氯-6 H-氧化铬[4,3- b ]喹啉和7-氯-6 H-硫代氧化铬[4] ,3- b ]喹啉具有令人满意的产率。
Catalytic Enantioselective Synthesis of 3,4-Unsubstituted Thiochromenes through Sulfa-Michael/Julia–Kocienski Olefination Cascade Reaction
作者:Amit Kumar Simlandy、Santanu Mukherjee
DOI:10.1021/acs.joc.7b00579
日期:2017.5.5
A highly enantioselectivecascade sulfa-Michael/Julia–Kocienski olefination reaction between 2-mercaptobenzaldehydes and β-substituted vinyl PT-sulfones has been realized for the synthesis of 3,4-unsubstituted 2H-thiochromenes. This reaction, catalyzed by diphenylprolinol TMS ether, proceeds through an aromatic iminium intermediate and furnishes a wide range of 2-substiuted 2H-thiochromenes with excellent
A novel domino condensation–intramolecular nucleophilic cyclization approach towards annulated thiochromenes
作者:Leonid G. Voskressensky、Ekaterina A. Sokolova、Alexey A. Festa、Alexey V. Varlamov
DOI:10.1016/j.tetlet.2013.07.040
日期:2013.9
A one-pot protocol towards previously unreported derivatives of thiochromeno [2',3':4,5] imidazo[2,1-a]isoquinoline via a domino reaction of isoquinoline-derived iminium salts and alpha-mercapto benzaldehydes is elaborated. (C) 2013 Elsevier Ltd. All rights reserved.
Cascade Thiol-Michael–Aldol Reaction Promoted by Tetramethyl Guanidine: Synthesis of 2H-Thiochromene-3-carboxylate Libraries
Tetramethylguanidine (TMG) promotes a cascade thiol-Michael-aldol-dehydration reaction between 2-mercaptobenzaldehyde and cinnamate esters to synthesize 2H-thiochromene-3-carboxylate derivatives. The target thiochromene compounds with a variety of substituents were obtained in high yields.