carboxamides afforded hydrochlorides of the correspondingN-(amidomethyl)-α-amino acid esters.N-(Phthalimidomethyl)-α-amino acid esters were obtained by reactions of α-amino acid esters containing free amino groups with formaldehyde and phthalimide, The1H NMR studies demonstrated that the chiral centers of α-amino acids may be retained in the course of condensation. Reactions of the Mannish bases obtained
甘
氨酸、丙
氨酸、苯丙
氨酸、L-
异琥珀酸和
L-缬氨酸酯的盐酸盐与芳香族和杂芳香族甲酰胺反应得到相应 N-(酰胺甲基)-
α-氨基酸酯的盐酸盐。 N-(邻苯二甲酰
氨基甲基)-
α-氨基酸含有游离
氨基的
α-氨基酸酯与
甲醛和邻苯二甲
酰亚胺反应得到酯,1H NMR研究表明
α-氨基酸的手性中心可能在缩合过程中保留。获得的曼尼什碱及其盐酸盐与
乙酸酐和甲
苯磺酰氯反应得到相应的N-芳基和N-磺酰基衍
生物。