Chemical and stereochemical aspects of propranolol metabolism. Diastereomeric 1-(1-hydroxy-2-propylamino)-3-(1-naphthoxy)-2-propanols produced by rat liver microsomal .omega.-hydroxylation
作者:H. Umesha Shetty、Wendel L. Nelson
DOI:10.1021/jm00160a034
日期:1986.10
standard, established formation of both diastereoisomers of 2 as metabolites of 1. These diastereoisomers were formed in unequal amounts when 1, its hexadeuterated analogue 8 or heptadeuterated analogue 9, were incubated in the presence of the rat liver microsomal fraction. Authentic (2R,2"S)-2, obtained from the amide formed from (2S)-3-(1-naphthoxy)-2-hydroxypropionic acid [(2S)-5] and (2S)-alaninol
建立了心得安(1)的N-异丙基末端羟基化(ω-羟基化)的新代谢途径。建立了以1-(1-羟基-2-丙基氨基)-3-(1-萘氧基)-2-丙醇(2)的非对映异构体的合成混合物为标准的选定的离子监测GC-MS分析方法形成两个非对映异构体2作为1的代谢物。当在大鼠肝微粒体存在下孵育1,其六氘代类似物8或七氘代类似物9时,这些非对映异构体的形成量不等。通过乙硼烷还原,从由(2S)-3-(1-萘氧基)-2-羟基丙酸[(2S)-5]和(2S)-丙氨醇形成的酰胺中获得真实的(2R,2“ S)-2,有助于检查此过程的立体化学方面。通过在大鼠肝脏微粒体组分存在下孵育1和假外消旋普萘洛尔[等摩尔(2R)-普萘洛尔-3,3-d2和(2S)-普萘洛尔-d0]的对映异构体,我们确定形成了非对映异构体产物(2S,2″ S)-2的阶数大约等于大于(2R,2″ S)-2的(2R,2″ R)-2的(2S,2″ R)-2。(2S