Oxygenation Reaction of Methyl Valproate with A Mono-oxygenase Model Reagent: Implication for Stereochemical Identification of the Mammalian Metabolites of Valproic Acid.
作者:Eiichi KOTANI、Tetsuta TAKEYA、Motohide YOSHIIKE、Atsuko WATANABE、Seisho TOBINAGA
DOI:10.1248/cpb.45.981
日期:——
Non-enzymic oxygenation reaction of methyl valproate (2) utilizing a simple model system for mono-oxygenases, Fe(MeCN)2+6-H2O2-Ac2O in MeCN, was investigated in connection with stereochemical analyses of the mammalian metabolites of 1. This oxygenation reaction of methyl valproate (2) gave a 92 : 8 mixture of the anti-isomer 4a and the syn-isomer 4b, together with 5a, and 5b corresponding to the mammalian metabolites of 1. The stereochemistry of 4a, 5a, and 5b was elucidated by spectral analyses of the corresponding β-lactone 6a, γ-lectone 7a and 7b prepared from the oxygenation products. The asymmetric synthesis of (+)-7a was also achieved.
关于1的哺乳动物代谢物的立体化学分析,研究了利用单加氧酶的简单模型系统Fe(MeCN)2+6-H2O2-Ac2O在MeCN中对甲基戊二酸酯(2)的非酶氧合反应。甲基戊二酸酯(2)的这种氧合反应得到了反式异构体4a和顺式异构体4b的92:8混合物,以及对应于1的哺乳动物代谢物的5a和5b。通过光谱分析由氧合产物制备的相应β-内酯6a、γ-内酯7a和7b,阐明了4a、5a和5b的立体化学。也实现了(+)-7a的不对称合成。