The synthesis and applications of asymmetric phase-transfer catalysts derived from isomannide and isosorbide
作者:Sanjeev Kumar、Uma Ramachandran
DOI:10.1016/j.tet.2005.02.010
日期:2005.4
We report herein the synthesis of various derivatives of isomannide and isosorbide. Alkylation on N-(diphenylmethylene)glycine tert-butyl ester show the new catalysts to be effective phase-transfercatalysts with moderately good enantioselectivity. The effect of exo and endo substituents on the enantioselectivity of alkylation reaction have also been studied.