申请人:Torcan Chemical Ltd.
公开号:US04760182A1
公开(公告)日:1988-07-26
Phenol ethers such as 1-[4-[2-(cyclopropylmethoxy)ethyl]phenoxy]-3-[(1-methylethyl)amino]-2-prop anol, otherwise known as betaxolol, of formula: ##STR1## are prepared from p-hydroxyphenethyl alcohol by first reacting at the phenolic group, with epichlorohydrin followed by isopropylamine, to prepare the required secondary amine-hydroxy side chain. Protection of the alcoholic group is not required during these steps. Then the secondary amine-alcohol group is protected by reaction with a suitable aldehyde such as benzaldehyde to form an oxazolidine ring protectant while the alcohol chain is elaborated. The oxazolidine ring protectant is removed by simple acid hydrolysis.
苯酚醚类化合物,如1-[4-[2-(环丙基甲氧基)乙基]苯氧基]-3-[(1-甲基乙基)氨基]-2-丙醇,也称为贝他索洛,其化学式为:##STR1## 由对羟基苯乙醇首先与环氧氯丙烷反应,随后与异丙胺反应制备所需的二级胺-羟基侧链。在这些步骤中不需要保护醇基。然后,通过与适当的醛(如苯甲醛)反应,保护二级胺-醇基团形成噁唑烷环保护剂,同时扩展醇链。通过简单的酸水解去除噁唑烷环保护剂。