(R)-2-amino-7-(2-bromo-4-fluoro-phenyl)-4-methyl-7,8-dihydro-6H-pyrido[4,3-d]pyrimidine-5-thione 、
(R)-O-((1,4-dioxan-2-yl)methyl)hydroxylamine 在
Acetic acid, mercury(2+) salt (2:1) crude mixture 、
甲醇 、
乙腈 、
水 作用下,
以
甲苯 为溶剂,
反应 1.0h,
以to afford (R,Z)-2-amino-7-(2-bromo-4-fluorophenyl)-4-methyl-7,8-dihydropyrido[4,3-d]pyrimidin-5(6H)-one O—((R)-1,4-dioxan-2-yl)methyl oxime (39A, 0.0405 g, 36.7% yield)的产率得到(R,Z)-2-amino-7-(2-bromo-4-fluorophenyl)-4-methyl-7,8-dihydropyrido[4,3-d]pyrimidin-5(6H)-one O-((R)-l,4-dioxan-2-yl)methyloxime