Syntheses of quinolines, dihydro- and tetrahydroquinolines via ortho-quinone methide imine intermediate
作者:Jennifer M. Wiebe、Alain S. Caillé、Laird Trimble、Cheuk K. Lau
DOI:10.1016/0040-4020(96)00685-0
日期:1996.9
secondary anilines via N-alkylanilinochlorophenylboranes has been developed. Pyrolysis of the resulting ortho-aminobenzyl alcohols generated the corresponding ortho-quinone methide imines, which can participate in an electrocyclic reaction to yield 2-substituted-1,2-dihydroquinolines. The resulting dihydroquinolines can be converted readily to a variety of 2-substituted quinolines. Intramolecular trapping
已经开发了经由N-烷基苯胺基氯苯基硼烷对仲苯胺进行邻位特异性羟烷基化的一般方法。所得的邻氨基苄基醇的热解产生了相应的邻甲基苯醌亚甲基亚胺,其可以参与电环反应以产生2-取代的1,2-二氢喹啉。所得的二氢喹啉可以容易地转化为各种2-取代的喹啉。经由[2 + 4]环加成反应用烯烃将邻醌甲基亚胺亚胺分子内捕获导致各种多环四氢喹啉的合成。