中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
3-溴-5-硝基吲唑 | 3-bromo-5-nitro-1H-indazole | 67400-25-3 | C7H4BrN3O2 | 242.032 |
1-甲基-5-硝基-1H-吲唑 | 1-methyl-5-nitro-1H-indazole | 5228-49-9 | C8H7N3O2 | 177.162 |
5-硝基吲唑 | 5-nitroindazole | 5401-94-5 | C7H5N3O2 | 163.136 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | Methyl-(1-methyl-5-nitro-1H-indazol-3-yl)-amine | 77894-75-8 | C9H10N4O2 | 206.204 |
—— | N,N,1-trimethyl-5-nitro-1H-indazol-3-amine | 77894-76-9 | C10H12N4O2 | 220.231 |
—— | 1-methyl-5-nitro-3-phenyl-1H-indazole | 728035-42-5 | C14H11N3O2 | 253.26 |
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.