Stereoselectivein-vitro aromatic-ring oxygenations of chiral 1,4-benzodiazepin-2-ones
作者:Dragutin Kolbah、Nikola Bla?evi?、Mohammad Hannoun、Franjo Kajfe?、Tomislav Kova?、Slobodan Rendi?、Vitomir ?unji?
DOI:10.1002/hlca.19770600134
日期:1977.1.26
Biological N(1)-demethylation and C(3)-hydroxylation of two enantiomeric 1,4-benzodiazepin-2-ones 1 and 2 (cf. scheme 2) were found to be nonstereoselective. Aromatic-ring hydroxylation, however, took place in the (S)-series only, leading to 3′- and 4′-hydroxylated, N(1)-demethylated, metabolites (54 and 56, cf. scheme 5: these structures were unambiguously confirmed by comparing their UV., CD., and
生物N(1)和-demethylation C(3)的两种对映体的1,4-苯并二氮杂-2-酮羟基化1和2(参见方案2)被发现是nonstereoselective。但是,芳香环羟基化仅在(S)系列中发生,导致3'-和4'-羟基化,N(1)-去甲基化的代谢产物(54和56,参见方案5:这些结构是通过比较它们的UV,CD和质谱图与真实样品的光谱图明确地确认)。从理论上讲,可以通过包括NIH位移在内的机理将几种化合物设想为1和2的芳香族A环中的羟基化产物。方案3)是合成的,但尚未从体外孵育混合物中分离出这些化合物。