Synthesis and comparison of some cardiovascular properties of the stereoisomers of labetalol
作者:Elijah H. Gold、Wei Chang、Marvin Cohen、Thomas Baum、Stewart Ehrreich、Gordon Johnson、Nicholas Prioli、Edmund J. Sybertz
DOI:10.1021/jm00353a017
日期:1982.11
A useful method for the separation of labetalol into its two racemic diastereomers, as well as a stereoselective synthesis of its four stereoisomers, is described. The absolute stereochemistry of each isomer was determined by analysis of the DC spectra and confirmed by X-ray analysis. The alpha- and beta 1-adrenergic blocking properties, as well as the relative antihypertensive activities, have been
描述了将拉贝洛尔分离成其两个外消旋非对映异构体以及其四个立体异构体的立体选择性合成的有用方法。通过DC光谱分析确定每种异构体的绝对立体化学,并通过X射线分析确认。已经在大鼠中测量了α-和β1-肾上腺素阻断特性以及相对的降压活性。R,R异构体2a(SCH 19927),实际上具有拉贝洛尔引起的所有β1阻断活性,几乎没有α阻断活性。相反,S,R异构体3a具有大部分的alpha阻滞活性。在四种异构体中,只有2a具有与拉贝洛尔相当的降压效能。这些发现,