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ChemInform Abstract: A New Class of Urea-Substituted Cinchona Alkaloids Promote Highly Enantioselective Nitroaldol Reactions of Trifluoromethylketones.

✍ Scribed by Carole Palacio; Stephen J. Connon

Publisher
John Wiley and Sons
Year
2011
Weight
34 KB
Volume
42
Category
Article
ISSN
0931-7597

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✦ Synopsis

Abstract

Among various catalysts tested, CHUR is found to be the most efficient one.

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ChemInform Abstract: An Enantioselective
ChemInform Abstract: An Enantioselective Synthesis of Natural (-)-Huperzine A via Cinchona Alkaloid Promoted Asymmetric Michael Reaction.
✍ S. KANEKO; T. YOSHINO; T. KATOH; S. TERASHIMA πŸ“‚ Article πŸ“… 2010 πŸ› John Wiley and Sons βš– 31 KB πŸ‘ 2 views

An Enantioselective Synthesis of Natural (-)-Huperzine A via Cinchona Alkaloid Promoted Asymmetric Michael Reaction. -An improved synthesis of the title compound is developed via the known intermediate (+)-(III) derived from the Ξ²-keto ester (I). After one recrystallization (+)-(III) is obtainable