摘要:
Asymmetric synthesis of L‐γ‐carboxyglutamic acid derivativesA modified Strecker synthesis according to Patel & Worsley was used to prepare γ,γ′‐di‐t‐butyl L(−)‐N‐phthaloyl‐γ‐carboxyglutamate with almost 100% optical purity and an overall yield of about 10% relative to di‐t‐butyl malonate, or 20% relative to (−)‐α‐methyl‐benzylamine (s. Scheme).