卤化吡啶具有区域选择性的锂化反应与2 ,6-二甲氧基-3-溴-4-二苯基膦基吡啶的合成(英文)

Regioselective Ortho-Lithiation of Halopyridines and Synthesis of 3-Bromo-2,6-dimethoxy-4-diphenylphosphinopridine

在卤化吡啶的锂化反应的区域选择性研究基础上 ,以 2 ,6 二甲氧基吡啶为原料 ,经溴化反应、邻位锂化反应和亲电取代反应制备了 2 ,6 二甲氧基 3 溴 4 二苯基膦基吡啶 ,最终收率可达 5 7.9%。

Regioselective ortho-Lithiation of halopyridines was studied. Then 3-bromo-2,6-dimethoxy-4-diphenylphosphinopridine was synthesized using 2,6-dimethoxypydine as a raw material through bromation, ortho-lithiation and electrophilic substitution. The whole yield may reach 57.9%.