Enantioselective α-Alkenylation of Aldehydes with Boronic Acids via the Synergistic Combination of Copper(II) and Amine Catalysis
摘要:
The enantioselective alpha-alkenylation of aldehydes has been accomplished using boronic acids via the synergistic combination of copper and chiral amine catalysis. The merger of two highly utilized and robust catalytic systems has allowed for the development of a mild and operationally trivial protocol for the direct formation of alpha-formyl olefins employing common building blocks for organic synthesis.
Enantioselective Organo-SOMO Catalysis: The α-Vinylation of Aldehydes
作者:Hahn Kim、David W. C. MacMillan
DOI:10.1021/ja077212h
日期:2008.1.1
enantioenriched α-vinyl aldehydes. The described reaction procedure achieves carbon−carbonbondformation in an efficient manner with consistently high levels of enantioinduction and geometrical control for the trans-olefin product. A wide range of both aldehydes and potassium organotrifluoroborate salts, including those typically susceptible to oxidative conditions, are accommodated under the reaction conditions