A concise synthesis of piperazine-2-carboxylic acids via β-lactam-derived α-amino acid N-carboxy anhydrides
作者:Claudio Palomo、Iñaki Ganboa、Carmen Cuevas、Carlos Boschetti、Anthony Linden
DOI:10.1016/s0040-4039(97)00956-8
日期:1997.6
α-amino aldehydes and chiral β-aminoalcohols. The resulting β-lactams on exposure to 0.55M NaOCl and a catalytic amount of 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO) afforded α-amino acid N-carboxy anhydrides formally derived from piperazine-2-carboxylic acids.
通过将烷氧基酮与衍生自手性α-氨基醛和手性β-氨基醇的亚胺进行[2 + 2]环加成反应,可以制得与哌嗪融合的3-羟基β-内酰胺。暴露于0.55M NaOCl和催化量的2,2,6,6-四甲基哌啶基-1-氧基(TEMPO)时生成的β-内酰胺提供了正式衍生自哌嗪-2-羧酸的α-氨基酸N-羧基酸酐。