A Simple Approach to β-Amino Acids by Acylation of Arenes with N-Acyl Aspartic Anhydrides
作者:Axel Griesbeck、Heike Heckroth
DOI:10.1055/s-1997-1007
日期:1997.11
Friedel-Crafts acylation of arenes (benzene, toluene, o-xylene) with N-protected (Bz, Ac, Ac-Bn, Ts, Tfac, N,N-Pht) aspartic anhydrides (1a-1f) resulted in mixtures of α- and β-amino acids. The β/α-selectivity could be optimized for alkylated arenes (toluene, xylene) and the N-Ac, N-Bn protected 1c.
用 N 保护(Bz、Ac、Ac-Bn、Ts、Tfac、N,N-Pht)的天冬氨酸酐(1a-1f)对炔类化合物(苯、甲苯、邻二甲苯)进行 Friedel-Crafts酰化反应,可得到δ-和²-氨基酸的混合物。δ/δ选择性可通过烷基化的茴香(甲苯、二甲苯)和 N-Ac、N-Bn 保护的 1c 得到优化。