The preparation of 4-, 5-, and 6-methoxy substituted 3-lithio-1-(trialkylsilyl)indoles 4b-d by metalation of the corresponding 3-bromoindoles, and their reactions with iodomethane, DMF, ethylene oxide and aziridines are reported. Transmetalation of 3-lithioindoles 4b-d with ZnCl2 afforded 3-indolylzinc chlorides 11b-d, which underwent Pd(0)-catalyzed cross-coupling reactions with 2-halopyridines to give 4-, 5-, and 6-methoxy substituted 3-(2-pyridyl)indoles.
报道了通过对相应的3-bromoindoles进行
金属化反应制备4-, 5-和6-甲氧基取代的3-
锂基-1-(三烷基
硅基)
吲哚4b-d,并与
碘甲烷、
DMF、
环氧乙烷和氮化环烷进行反应。3-
锂基
吲哚4b-d与ZnCl2的转
金属化反应生成3-
吲哚基
锌氯化物11b-d,这些化合物经过Pd(0)催化的交叉偶联反应与2-卤
吡啶反应,生成4-, 5-和6-甲氧基取代的3-(2-
吡啶基)
吲哚。