Synthesis of nonproteinogenic amino acids part 2: preparation of a synthetic equivalent of the γ anion synthon for asymmetric amino acid synthesis
作者:Jack E. Baldwin、Michael North、Anthony Flinn、Mark G. Moloney
DOI:10.1016/0040-4020(89)80144-9
日期:1989.1
The synthesis of α--butyl γ-methyl -trityl-(S)-glutamate (12) from (S)-glutamic acid (6) is described. Diester (12), on treatment with lithium Isopropylcyclohexylamide followed by the addition of carbonyl compounds, reacts to give the γ-substituted glutamic acid derivatives (13a-i) with retention of optical purity at the α centre.