Analogs of propranolol. Synthesis of 3-alkylamino-1-(3-benzo[<i>b</i>]thienyloxy)-2-propanols
作者:Santiago Conde、Carlos Corral、Jaime Lissavetzky
DOI:10.1002/jhet.5570170518
日期:1980.7
The synthesis by two alternative routes of 1-(3-benzo[b]thienyloxy)-3-isopropylamino-2-propanol hydrochloride (1a HCl), a thiophenic isoster of Propranolol, and related compounds, is reported. The protecting and enolizing properties of the 2-methoxycarbonyl group on benzo[b]thiophene-3-one, along with its facile removal, are utilized in the first route. In the second one, conversion of 3-bromobenzo[b]thiophene
据报道通过1-(3-苯并[ b ]噻吩氧基)-3-异丙基氨基-2-丙醇盐酸盐(1a HCl),普萘洛尔的噻吩异构体和相关化合物的两种替代路线进行合成。在第一途径中,利用苯并[ b ]噻吩-3-酮上的2-甲氧基羰基的保护和烯醇化以及其容易除去。在第二个步骤中,关键步骤是将3-溴苯并[ b ]噻吩转化为1-(3-苯并[ b ]噻吩氧基)-2,3-邻-异亚丙基丙烷。另一方面,1-(3-苯并[ b ]呋喃基氧基)-2,3- o的水解为了获得普萘洛尔(17a)的呋喃异构体,将-异亚丙基丙烷转化成相应的二醇是不成功的。