On the stereochemistry of the decarboxylation of (2S)-histidine catalysed by histidine decarboxylase from Clostridium welchii(E.C.4.1.1.22)
作者:Enzo Santaniello、Ada Manzocchi、Pier Antonio Biondi
DOI:10.1039/p19810000307
日期:——
By decarboxylation of (2S)-histidine (1) in 2H2O in the presence of histidine decarboxylase from Clostridium welchii, monodeuteriated histamine (2a) was obtained. Ruthenium tetraoxide oxidation of (2a) furnished deuteriated β-alanine (3a), which was converted into the methyl ester of its phthaloyl derivative (6c). This compound showed a negative optical rotation, as did (6a) prepared from (3R)–(3c)
在存在来自韦氏梭状芽胞杆菌的组氨酸脱羧酶的情况下,通过在2 H 2 O中使(2 S)-组氨酸(1)脱羧,得到单氘化的组胺(2a)。(2a)的四氧化钌氧化提供了氘代的β-丙氨酸(3a),其被转化为其邻苯二甲酰衍生物(6c)的甲酯。该化合物显示出负旋光性,由(3 R)–(3c)制备的(6a)也是如此。根据这些结果,(R)-构型可归因于(2a),因此(1)的脱羧继续保持构型。