Facile two-step synthesis of 3-substituted indazoles using diazo(trimethylsilyl)methylmagnesium bromide
作者:Yoshiyuki Hari、Ryosuke Sone、Toyohiko Aoyama
DOI:10.1039/b907796k
日期:——
Diazo(trimethylsilyl)methylmagnesium bromide readily reacted with various ketones and aldehydes to give the corresponding 2-diazo-(2-trimethylsilyl)ethanols. These were efficiently converted to indazoles bearing hydroxymethyl units at the 3-position by intermolecular [3 + 2] cycloaddition with benzynes.
重氮(三甲基硅基)甲基溴化镁很容易与各种酮和醛发生反应,生成相应的 2-重氮(2-三甲基硅基)乙醇。通过分子间[3 + 2]环加成与苄基化合物的反应,这些物质被有效地转化为在 3 位上含有羟甲基单元的吲唑。