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Asymmetric Synthesis of 4-Amino-4H-Chromenes by Organocatalytic Oxa-Michael/Aza-Baylis–Hillman Tandem Reactions

✍ Scribed by José Alemán; Alberto Núñez; Leyre Marzo; Vanesa Marcos; Cuauhtémoc Alvarado; José Luis García Ruano

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
232 KB
Volume
16
Category
Article
ISSN
0947-6539

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A Novel Enantioselective Catalytic Tande
A Novel Enantioselective Catalytic Tandem Oxa-Michael–Henry Reaction: One-Pot Organocatalytic Asymmetric Synthesis of 3-Nitro-2H-chromenes
✍ Dan-Qian Xu; Yi-Feng Wang; Shu-Ping Luo; Shuai Zhang; Ai-Guo Zhong; Hui Chen; Zh 📂 Article 📅 2008 🏛 John Wiley and Sons 🌐 English ⚖ 224 KB 👁 2 views

## Abstract An enantioselective oxa‐Michael–Henry reaction of substituted salicylaldehydes with nitroolefins that proceeds though an aromatic iminium activation (AIA) has been developed by using a chiral secondary amine organocatalyst and salicylic acid as a co‐catalyst. The corresponding 3‐nitro‐2