A practical palladium-catalyzed ortho-olefination of O-acetyl cyanohydrins assisted by synergetic directing groups has been developed. Thus, a range of olefinated O-acetyl cyanohydrins were synthesized in moderate to good yields. The reaction occurs efficiently with high regioselectivity and with a satisfactory tolerance of functional groups.
Kinetic resolution of cyanohydrins via enantioselective acylation catalyzed by lipase PS-30
作者:Qing Xu、Xiaohong Geng、Peiran Chen
DOI:10.1016/j.tetlet.2008.08.090
日期:2008.11
By using lipase PS-30 as catalyst, the kinetic resolution of a series of racemic cyanohydrins has been achieved via enantioselective acylation. The values of kinetic enantiomeric ratio (E) reached up to 314. Substituent effect is also briefly discussed. (C) 2008 Elsevier Ltd. All rights reserved.