Synthesis and Radical Cyclization of 2-(β-Haloacyl)-1,2-dihydroisoquinolines by Means of Tin Hydride. One-Pot Synthesis of Benzo[<i>f</i>]indolizidine Systems from Isoquinolines
作者:Ryohei Yamaguchi、Takashi Hamasaki、Kiitiro Utimoto
DOI:10.1246/cl.1988.913
日期:1988.6.5
Reactions of isoquinolines activated by 2-halopropionyl chlorides with tributyltin hydride afford selectively 2-(2-halopropionyl)-1,2-dihydroisoquinolines in good yields, the radical cyclizations of which furnish benzo[f]indolizidine systems. The above two reactions can be consecutively achieved in one-pot. Furthermore, the present procedures are extended to synthesis of 12,12a-dihydroisoindolo[2,
由 2-卤代丙酰氯活化的异喹啉与氢化三丁基锡的反应以良好的产率选择性地提供 2-(2-卤代丙酰基)-1,2-二氢异喹啉,其自由基环化提供苯并[f] 吲哚里西啶系统。以上两个反应可以在一锅法中连续完成。此外,本程序扩展到 12,12a-二氢异吲哚并 [2,3-b]isoquinolin-5(7H)-one 的合成。