New bicyclic heterocycles 5, which are potentially useful for the enantioselective synthesis of substituted β-amino acids, have been synthesized. A study on the α-alkylation of these chiral auxiliaries is presented. An optically pure β-amino acid was obtained in excellent yield from its masked chiral derivative 6a.
新合成的双环杂环 5 有可能用于取代的 δ-
氨基酸的对映选择性合成。本文对这些手性助剂的δ-烷基化进行了研究。从其掩蔽手性衍
生物 6a 中获得了光学纯的δ-²-
氨基酸,收率极高。