Conjugate Addition/Ireland−Claisen Rearrangements of Allyl Fumarates: Simple Access to Terminally Differentiated Succinates
摘要:
The conjugate addition of dialkylzinc reagents to allyl fumarates with subsequent Ireland-Claisen rearrangement has been accomplished yielding substituted unsymmetrical succinic acid derivatives. This one-pot reaction creates two new carbon-carbon bonds at contiguous stereogenic centers. The reaction proceeds for several alkylzinc reagents and substituted allyl fumarates. The products contain distinguishable functional handles for further manipulation.
Conjugate Addition/Ireland−Claisen Rearrangements of Allyl Fumarates: Simple Access to Terminally Differentiated Succinates
作者:Cory C. Bausch、Jeffrey S. Johnson
DOI:10.1021/jo701778k
日期:2008.2.1
The conjugate addition of dialkylzinc reagents to allyl fumarates with subsequent Ireland-Claisen rearrangement has been accomplished yielding substituted unsymmetrical succinic acid derivatives. This one-pot reaction creates two new carbon-carbon bonds at contiguous stereogenic centers. The reaction proceeds for several alkylzinc reagents and substituted allyl fumarates. The products contain distinguishable functional handles for further manipulation.
Zwitterion-Catalyzed Isomerization of Maleic to Fumaric Acid Diesters
作者:Ying-Pong Lam、Zachary Lam、Ying-Yeung Yeung
DOI:10.1021/acs.joc.0c02316
日期:2021.1.1
Fumaricacid diesters are important building blocks for organic synthesis. A class of zwitterionic organocatalysts based on an amide anion/iminium cation charge pair were found to be effective in catalyzing the isomerization of maleicacid diesters to give fumaricacid diesters. Comparison of the performance of different zwitterionic organocatalysts toward the reaction revealed that nonclassical hydrogen