N-diallylamino)bromopyridine. Whereas cyclization proceeds as expected to give 1-allyl-3-methyl-4-azaindoline and 1-allyl-3-methyl-6-azaindoline following protonation of the 3-CH2Li group of the azaindoline, the isomeric 3-methyl-5-azaindoline and 3-methyl-7-azaindoline are generated as 3-methyl-N-allyl anions prior to quench with MeOH.
已开发出一种操作方便的一锅三步程序,可通过分子内碳氢键合反应获得3-取代的4-,5-,6-和
7-氮杂吲哚(2,3-二氢-1H-
吡咯并
吡啶)。衍生自适当的(N,N-
二烯丙基氨基)
溴吡啶的芳基
锂。环化按预期进行,得到了氮杂
吲哚的3-
CH2Li基的质子化后的1-烯丙基-3-甲基-
4-氮杂吲哚啉和1-烯丙基-3-甲基-
6-氮杂吲哚啉,异构体3-甲基-5-在用MeOH淬灭之前,将氮杂二氢
吲哚和3-甲基-7-氮杂二氢
吲哚生成为3-甲基-N-烯丙基阴离子。