An efficient synthesis of (R)-(+)- and (S)-(-)-propranolol from resolved 5-idomethyloxazo-lidin-2-ones
作者:Giuliana Cardillo、Mario Orena、Sergio Sandri、Claudia Tomasini
DOI:10.1016/s0040-4020(01)81657-4
日期:——
5S,R)-3-(1'-phenyleth-l'-yl)-5-iodomethyloxazolidin-2-ones, , have been synthesized and easily resolved by silica gel chromatography. Each pure diastereomer has been then converted to (S)-(-)-propranolol and (R)-(+)-propranolol , respectively. An empirical correlation of configuration and 1H NMR chemical shift for alternate diastereomers has been devised and has proved to be applicable in assigning
(1'S *,5S,R)-3-(1'-苯基乙-1'-基)-5- iodomethyloxazolidin -2-酮,,已被合成,并通过硅胶色谱法容易地得到解决。然后将每种纯的非对映异构体分别转化为(S)-(-)-普萘洛尔和(R)-(+)-普萘洛尔。已经设计了与非对映异构体的构型和1 H NMR化学位移的经验相关性,并已证明可用于分配5-取代的3-(1'-苯基乙基-1'-基)草氮杂环丁烷-2-酮的构型。