Preparation of Optically Active Secondary Amines by Thermal Decomposition of (Methylbenzyl)urea Analogs: Absolute Configuration of (+)- and (−)-Mecamylamine. Preliminary Communication
作者:Bernhard Schönenberger、Arnold Brossi、Clifford George、Judith L. Flippen-Anderson
DOI:10.1002/hlca.19860690205
日期:1986.3.19
Thermolysis of the (α-methylbenzyl)urea diastereoisomers 4 and 5 of (±)-mecamylamine ((±)-1) and 6 and 7 of (±)-1-noreseroline O-methyl ether ((±)-3) in refluxing alcohol afforded optically pure amines in high yield, besides optically pure carbamates of (α-methylbenzyl)amine which can be recycled. The absolute configuration of (−)-mecamylamine hydrochloride ((−)-1 · HCl) was determined by X-ray diffraction
(±)-美甲胺((±)-1)的(α-甲基苄基)脲非对映异构体4和5和(±)-1-去甲甾氨酸O-甲基醚((±)-3)的6和7的热解。回流的醇除了可以循环利用的(α-甲基苄基)胺的光学纯氨基甲酸酯外,还以高收率提供了光学纯的胺。通过X射线衍射分析来确定(-)-甲酰胺胺盐酸盐((-)- 1 ·HCl)的绝对构型。