Synthesis of N-carboxyalkyl-1,4-benzothiazepine-3(2H)-one derivatives using esters of N-(2-chloro-5-nitrobenzyl)amino acids
作者:Taras M. Tarasiuk、Tetiana A. Volovnenko、Yulian M. Volovenko、Volodymyr V. Medviediev、Oleg V. Shishkin
DOI:10.1007/s00706-013-1133-1
日期:2014.3
synthesis of esters of N-(2-chloro-5-nitrobenzyl) amino acids have been developed and compared. We have found synthesis of N-(2-chloro-5-nitrobenzyl) amino acids via alkylation of esters of amino acids in DMF in the presence of Et3N and NaI to be more convenient and have higher yields in comparison with reduction of Schiff bases obtained from 2-chloro-5-nitrobenzaldehyde and corresponding esters of amino
摘要已经开发和比较了两种用于合成N-(2-氯-5-硝基苄基)氨基酸酯的替代方法。我们已经发现,在存在Et 3 N和NaI的情况下,通过在DMF中将氨基酸的酯烷基化可以合成N-(2-氯-5-硝基苄基)氨基酸,与降低席夫(Schiff)相比,更方便且产率更高。 NaBH 4由2-氯-5-硝基苯甲醛和相应的氨基酸酯获得的碱。用硫代乙醇酸甲酯处理DMSO中N-(2-氯-5-硝基苄基)氨基酸酯的溶液并在二甲苯中分子内酰化后生成N-羧基烷基-1,4-苯并噻吩并3(2 H)-一种衍生物,产率为24–76%。 图形概要