Preparation and Reactions of 4-, 5-, and 6-Methoxy Substituted 3-Lithioindoles and 3-Indolylzinc Derivatives
作者:Mercedes Amat、Fátima Seffar、Núria Llor、Joan Bosch
DOI:10.1055/s-2001-10812
日期:——
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。