The first catalytic enantioselective aldol reaction of various unprotected carboxylicacids is described. In the presence of a chiral bis(phosphine oxide) as a Lewis base catalyst, carboxylicacids were activated with silicon tetrachloride to form the corresponding bis(trichlorosilyl)enediolates in situ, which subsequently underwent an aldol reaction with an aldehyde or a ketone to produce β‐hydroxycarboxylic
A New Catalytic Conjugate Addition/Aldol Strategy That Avoids Preformed Metalated Nucleophiles
作者:Kandasamy Subburaj、John Montgomery
DOI:10.1021/ja0362048
日期:2003.9.1
A new conjugateaddition/aldol strategy has been developed. Unlike conventional procedures that require metalation of the nucleophilic species, the procedure allows the direct coupling of aryl iodides, aldehydes, and acrylates in a nickel-catalyzed, organozinc-promoted process.
Surface-Mediated Solid Phase Reaction. IX. A Convenient Procedure for Aldol Reaction of Ketene Silyl Acetals with Aldehydes on the Solid Surface of Alumina
作者:Brindaban C. Ranu、Manika Saha、Sanjay Bhar
DOI:10.1080/00397919708005012
日期:1997.9
The aldol reaction of ketene silyl acetals with aldehydes proceeds efficiently on the solid surface of alumina impregnated with anhydrous zinc chloride under sonication providing aldol products in high yields and with good stereoselectivity.