申请人:American Cyanamid Company
公开号:US04087611A1
公开(公告)日:1978-05-02
A process for the manufacture of 1-(2-alkoxyethyl)-4-phenyl-4-imidazolin-2-ones, 1-(2-alkoxyethyl)-4-phenyl-2-imidazolidones, 1-(2-alkoxyethyl)-4-phenyl-imidazolidine-2-thiones, certain of the corresponding 1-(2-hydroxyethyl) derivatives, and their 3-acylated derivatives, and certain related compounds which are all useful as intermediates in a new process for the manufacture of the anthelmintic levamisole, (-)-2,3,5,6-tetrahydro-6-phenylimidazo-[2,1-b]thiazole, and its derivatives through conventional resolution procedures. The new process also permits the direct manufacture of optically active 1-(2-alkoxyethyl)-4-phenyl-2-imidazolidone and their 3-acylated derivatives, optically active 1-(2-alkoxyethyl)-4-phenylimidazolidine-2-thiones, and levamisole, the levorotatory isomer of tetramisole, using catalytic amounts of a chiral reducing agent, with the elimination of conventional resolution procedures.
一种用于制造1-(2-烷氧基乙基)-4-苯基-4-咪唑啉-2-酮,1-(2-烷氧基乙基)-4-苯基-2-咪唑烷酮,1-(2-烷氧基乙基)-4-苯基咪唑烷-2-硫酮,相应的某些1-(2-羟乙基)衍生物以及它们的3-酰化衍生物的制造工艺,以及某些相关化合物,这些化合物都可作为新工艺制造抗蠕虫药左旋咪唑唑,(-)-2,3,5,6-四氢-6-苯基咪唑[2,1-b]噻唑醇及其衍生物的中间体。新工艺还允许直接制造光学活性的1-(2-烷氧基乙基)-4-苯基-2-咪唑烷酮及其3-酰化衍生物,光学活性的1-(2-烷氧基乙基)-4-苯基咪唑烷-2-硫酮和左旋咪唑唑,即四氢咪唑唑的左旋异构体,使用催化量的手性还原剂,消除传统的分离程序。