Bifunctional thiophosphinamide catalyzed highly enantioselective Michael addition of acetone to (E)-2-azido β-nitrostyrenes and the subsequent reductive cyclization
作者:Hao Zhang、Youming Wang、Zhenghong Zhou
DOI:10.1016/j.tet.2018.08.052
日期:2018.10
2R)-1,2-diphenylethane-1,2-diamine is an efficient catalyst for the asymmetricMichael addition of acetone to (E)-2-azido β-nitrostyrenes. Under the optimal reactionconditions, the corresponding Michael addition products were obtained in excellent yields with almost perfect stereocontrol. Upon treatment with Et3SiH/InCl3, the Michael addition products could be successfully converted to the related
Cascade Intermolecular Michael Addition–Intramolecular Azide/Internal Alkyne 1,3-Dipolar Cycloaddition Reaction in One Pot
作者:Rajesh K. Arigela、Anil K. Mandadapu、Sudhir K. Sharma、Brijesh Kumar、Bijoy Kundu
DOI:10.1021/ol300399y
日期:2012.4.6
A rapid one-pot protocol for the synthesis of indole-based polyheterocycles via a sequential Lewis acid catalyzed intermolecular Michael addition and an intramolecular azide/internalalkyne1,3-dipolarcycloaddition reaction has been described. The generality of the method has been demonstrated by treating a series of aromatic/aliphatic 2-alkynyl indoles with substituted (E)-1-azido-2-(2-nitrovinyl)benzenes
已经描述了一种快速的一锅法方案,该方案通过顺序的路易斯酸催化的分子间迈克尔加成和分子内的叠氮化物/内部炔烃1,3-偶极环加成反应来合成基于吲哚的多杂环。该方法的通用性已通过用取代的(E)-1-叠氮基-2-(2-硝基乙烯基)苯处理一系列芳族/脂肪族2-炔基吲哚来证明提供环化的四环吲哚[2,3- c ],从而证明了该方法的一般性。[1,2,3]三唑并[1,5- a ] [1]苯并ze庚因产量高。
Asymmetric synthesis of tetrahydroquinolines through supramolecular organocatalysis
作者:Dhevalapally B. Ramachary、Kodambahalli S. Shruthi
DOI:10.1039/c4ob00570h
日期:——
Functionalized chiral tetrahydroquinolines were synthesized through supramolecular organocatalysis using quinidine-NH-thiourea 3c/l-phenylalanine 4i followed by reductive amination from the simple substrates.