<scp>D</scp>(−)- and<scp>L</scp>(+)-γ-Carboxyglutamic Acid (Gla): Resolution of Synthetic Gla Derivatives
作者:Walter Märki、Max Oppliger、Peter Thanei、Robert Schwyzer
DOI:10.1002/hlca.19770600310
日期:1977.4.20
AbstractThe chemical resolution of γ,γ′‐di‐t‐butyl DL‐N‐benzyloxycarbonyl‐γ‐carboxy‐glutamate is described in detail (preliminary account see [1]). The D (−)‐derivative was obtained as a crystalline quinine salt, and the L (+)‐derivative as a crystalline salt with (−)‐ephedrine in yields of 44 and 70%, respectively. Physical data are indicated for the enantiomers of γ,γ′‐di‐t‐butyl N‐benzyloxycarbonyl‐γ‐carboxyglutamate, γ,γ′‐di‐t‐butyl γ‐carboxyglutamate, and γ‐carboxyglutamic acid. The absolute configurations and optical purities of the γ,γ′‐di‐t‐butyl (+)‐ and (−)‐N‐benzyloxycarbonyl‐γ‐carboxyglutamates were determined by removal of the protecting groups and decarboxylation to optically active glutamic acid.