Dehydrooligopeptides. XII. Convenient synthesis of various kinds of N-benzyloxycarbonyl-.ALPHA.-dehydroamino acid methyl esters.
作者:Chung-gi SHIN、Nobuyuki TAKAHASHI、Yasuchika YONEZAWA
DOI:10.1248/cpb.38.2020
日期:——
Various N-benzyloxycarbonyl-α-dehydroamino acid methyl esters were newly synthesized by the condensation of α-oxocarboxylic acids with benzyl carbomate followed by methyl esterfication. Others were obtained by the Wittig-Horner reaction of aldehydes with diethoxyphosphinylglycine and by the base-catalyzed β-elimination of β-acetoxy or β-halo-α-amino acids.
通过α-氧代羧酸与苄基碳酸酯的缩合反应,随后进行甲酯化,新合成了多种N-苄氧羰基-α-脱氢氨基酸甲酯。其他产物则通过醛与二乙氧基膦酸基甘氨酸的Wittig-Horner反应,以及碱性催化下β-乙酸氧基或β-卤代-α-氨基酸的β-消除反应获得。