Synthesis of two cyclic analogs of glutamic acid: cis- and trans-pyrrolidine-2,4-dicarboxylic acids
作者:Frano̧is Trigalo、Christophe Molliex、Brigitte Champion、Robert Azerad
DOI:10.1016/0040-4039(91)80684-x
日期:1991.6
tosyl ester 2 of tetraethyl 1-acetamido-4-hydroxybutane- 1,1,3,3-tetracarboxylate gave 4-methylene glutammic acid in 90% yield by refluxing with concentrated HC1. Treatment of 2 with NaOEt, then with refluxing concentrated HC1 gave a 54% yield of cis and trans-pyrrolidine-2,4-dicarboxylic acids 4 and 5, separated by anion exchange chromatography An analytical resolution of 4 and 5 enantiomers by chiral
1-乙酰胺基-4-羟基丁烷-1,1,3,3-四羧酸酯的甲苯磺酸酯2通过与浓HCl回流以90%的收率得到4-亚甲基谷氨酸。用NaOEt处理2,然后回流浓缩的HCl,得到54%的顺式和反式-吡咯烷-2,4-二元羧酸4和5,通过阴离子交换色谱分离。通过手性衍生化得到4和5个对映异构体的解析拆分。说明了GPC。