Stereochemical Analysis of the Enzymic Reduction of the Double Bond of α- and β-Substituted Nitrostyrenes and α-Ethoxycinnamaldehyde through Deuterium Labelling Experiments
作者:Elisabetta Brenna、Giovanni Fronza、Claudio Fuganti、Francesco G. Gatti
DOI:10.1002/ejoc.201000442
日期:2010.9
and comparison with authentic labelled reference compounds prepared from the (Z)-acetamido-cinnamic acid 10 and from (Z)-2-ethoxy-3-(4-methoxyphenyl)prop-2-en-1-ol (14), respectively, by catalytic syn reduction with deuterium gas show that the baker's yeast-mediated saturation in the presence of deuterated water of the double bond of (E)-α-(hydroxymethyl)nitrostyrene (2) and of the (Z)-α-ethoxycinnamaldehyde
2 H NMR 研究以及与由 (Z)-乙酰氨基-肉桂酸 10 和 (Z)-2-乙氧基-3-(4-甲氧基苯基)prop-2-en-1-ol 制备的可靠标记参考化合物的比较 ( 14) 分别通过用氘气催化合成还原表明面包酵母介导的饱和在 (E)-α-(羟甲基) 硝基苯乙烯 (2) 和 (Z) 的双键的氘水存在下-α-乙氧基肉桂醛 (3) 导致 (2R,3R)-[2,3- 2 H 2 ]-3-(4-甲氧基苯基)-2-硝基丙-1-醇 (5) 和 (1R,2S, 3R)-[1,2,3- 3 H 2 ]-2-ethoxy-3-(4-methoxyphenyl)propan-1-ol (6),因此支持跨活化双键的反加氢模式, 氢化物从分子的上侧传递到激活基团的 β 位。