中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
6-溴吲唑 | 6-bromo-1H-indazole | 79762-54-2 | C7H5BrN2 | 197.034 |
A mechanically-activated chemoselective Heck coupling for the synthesis of 3-vinylindazoles has been developed with the aid of catalytic amounts of TBAB and NaBr as both dehalogenation restrainer and grinding auxiliary. After tuning of the chemical conditions and mechanical parameters, a series of non-activated 3-bromoindazoles and a broad scope of olefins worked well to give the corresponding coupling products in good to excellent yields. A further application of this protocol was performed in a two-step mechanochemical Heck/Migita cross coupling, which provided a highly efficient route for the synthesis of axitinib.