A new BINOL-derived chiral bifunctional phosphine organocatalyst: Preparation and application in asymmetric (Aza)-morita-baylis-hillman reactions

摘要

A new BINOL-derived chiral bifunctional phosphine has been designed and successfully prepared, which features a cyclic substructure of 1,3,5-diazaphosphinane. This chiral phosphine possesses good air stability in solid state, and it can be conveniently used as a relatively more nucleophilic phosphine organocatalyst. Preliminary investigations showed that it could generally afford fair to excellent yields but only modest enantioselectivity in the (aza)-Morita-Baylis-Hillman reactions of activated olefins such as ethyl acrylate and methyl vinyl ketone with aldehydes or imines. [Supplementary materials are available for this article. Go to the publisher's online edition of Phosphorus Sulfer and Silicon and the Related Elements for the following free supplemental files: Additional text and figures.]