(R)-2-amino-7-(2-bromo-4-fluoro-phenyl)-4-methyl-7,8-dihydro-6H-pyrido[4,3-d]pyrimidine-5-thione 、
(R)-o-((2,2-二甲基-1,3-二氧杂烷-4-基)甲基)羟胺 在
crude mixture 、 AcCN H2O 、
三氟乙酸 作用下,
以
1,4-二氧六环 为溶剂,
反应 12.0h,
以to afford the product (R,Z)-2-amino-7-(2-bromo-4-fluorophenyl)-4-methyl-7,8-dihydropyrido[4,3-d]pyrimidin-5(6H)-one O—((R)-2,2-dimethyl-1,3-dioxolan-4-yl)methyl oxime (32A)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)-2,2-dimethyl-1,3-dioxolan-4-yl)methyloxime