A Bifunctional Cinchona Alkaloid-Squaramide Catalyst for the Highly Enantioselective Conjugate Addition of Thiols to trans-Chalcones
作者:Le Dai、Su-Xi Wang、Fen-Er Chen
DOI:10.1002/adsc.201000334
日期:2010.9.10
A chiral squaramide catalysts‐promoted asymmetric sulfa‐Michael conjugated addition of thiols to trans‐chalcones is presented. Moderate to excellent yields and high enantioselectivities (up to 99% ee) were achieved under mild conditions.
Investigation of Squaramide Catalysts in the Aldol Reaction En Route to Funapide
作者:Isaac G. Sonsona、Andrea Vicenzi、Marco Guidotti、Giorgiana Denisa Bisag、Mariafrancesca Fochi、Raquel P. Herrera、Luca Bernardi
DOI:10.1002/ejoc.202101254
日期:2022.1.11
The asymmetric aldolreaction of an industrially viable synthesis of funapide, a promising analgesic agent, was studied with a range of squaramide catalysts. Compared to previously employed thiourea structures, these catalysts provided a non-negligible improvement in the enantioselectivity of the reaction, while keeping similar activity.