Highly effective diastereodifferentiation of Meso-dicarboxylic anhydrides using sterically congested chiral N-sulfonylaminoalcohols
作者:Hideo Imado、Tadao Ishizuka、Takehisa Kunieda
DOI:10.1016/0040-4039(94)02375-l
日期:1995.2
The differentiation between enantiotopic carbonyl groups of cyclic meso-dicarboxylic anhydrides has been attained with excellent diastereofacial selectivity with an isomer ratio above 99 : 1 by treatment with the lithium salts of sterically hindered chiral N-arylsulfonyl-2-aminoalcohols in the presence of hexamethylphosphoric triamide.