1313052-77-5Relevant academic research and scientific papers
Highly efficient and enantioselective Michael addition of acetylacetone to nitroolefins catalyzed by chiral bifunctional organocatalyst bearing multiple hydrogen-bonding donors
Shi, Xin,He, Wei,Li, Hua,Zhang, Xu,Zhang, Shengyong
, p. 3204 - 3207 (2011)
A new efficient catalyst system for the asymmetric addition of acetylacetone to nitroolefins using a chiral bifunctional organocatalyst bearing multiple hydrogen-bonding donors was developed. When using the organocatalyst 2c derived from natural cinchona alkaloid in optimal conditions, up to 98% chemical yield and 98% ee were observed with a variety of aromatic nitroolefins.
Highly enantioselective Michael addition of diethyl malonate to chalcones catalyzed by cinchona alkaloids-derivatived bifunctional tertiary amine-thioureas bearing multiple hydrogen-bonding donors
Liu, Yulong,Wang, Xie,Wang, Xiaoyun,He, Wei
, p. 3163 - 3166 (2014/05/06)
Chalcones are still challenge substrates in Michael reactions, and only limited success has been achieved. This work describes a highly enantioselective Michael addition of diethyl malonate with chalcones catalyzed by cinchona alkaloids-derivatived bifunctional tertiary amine-thioureas bearing multiple hydrogen-bonding donors.
