Generation of<i>N</i>-(<i>tert</i>-Butoxycarbonyl)indole-2,3-quinodimethane and Its [4+2]-Type Cycloaddition
作者:Fuyuhiko Inagaki、Masaya Mizutani、Norikazu Kuroda、Chisato Mukai
DOI:10.1021/jo901325d
日期:2009.8.21
The two conditions for the preparation of the reactive N-(tert-butoxycarbonyl)indolo-2,3-quinodimethane intermediate were developed by the reaction of the N-(tert-butoxycarbonyl)-2-(1-ethoxycarbonyloxymethylallenyl)aniline with K2CO3 or Pd2(dba)3 in refluxing toluene. The resulting N-(tert-butoxycarbonyl)indolo-2,3-quinodimethane was captured by several alkenyl and alkynyl dienophiles to provide the
通过使N-(叔丁氧基羰基)-2-(1-乙氧基羰氧基甲基甲基烯基)苯胺与K 2反应,开发了制备反应性N-(叔丁氧基羰基)吲哚-2,3-喹二甲烷中间体的两个条件。回流甲苯中的CO 3或Pd 2(dba)3。所得的N-(叔丁氧基羰基)吲哚-2,3-喹二甲烷被数个烯基和炔基二亲二烯体捕获,以提供相应的四氢-和二氢咔唑衍生物。