(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 、
6-methoxy-2-pyridineboronic acid N-phenyldiethanolamine ester 在
31H 作用下,
以the step of 31H to 31J, to afford (R,Z)-2-amino-7-(4-fluoro-2-(6-methoxypyridin-2-yl)phenyl)-4-methyl-7,8-dihydropyrido[4,3-d]pyrimidin-5(6H)-one O-((R)-1,4-dioxan-2-yl)methyl oxime (40, 37.3% yield)的产率得到