(R)-2-amino-7-(2-bromo-4-fluoro-phenyl)-4-methyl-7,8-dihydro-6H-pyrido[4,3-d]pyrimidine-5-thione 、
(2S,4R)-tert-butyl 2-(aminooxymethyl)-4-(tert-butyldimethylsilyloxy)pyrrolidine-1-carboxylate 在
Acetic acid, mercury(2+) salt (2:1) 作用下,
以
甲苯 为溶剂,
反应 2.0h,
以to afford (2S,4R)-tert-butyl 2-(((Z)—((R)-2-amino-7-(2-bromo-4-fluorophenyl)-4-methyl-7,8-dihydropyrido[4,3-d]pyrimidin-5-(6H)-ylidene)aminooxy)methyl)-4-(tert-butyldimethylsilyloxy)pyrrolidine-1-carboxylate (200 mg, 50%) as off white solid的产率得到(2S,4R)-tert-butyl 2-(((Z)-((R)-2-amino-7-(2-bromo-4-fluorophenyl)-4-methyl-7,8-dihydropyrido[4,3-d]pyrimidin-5-(6H)-ylidene)aminooxy)methyl)-4-(tert-butyldimethylsilyloxy)pyrrolidine-1-carboxylate