(R)-hexahydroimidazo[1,5-a]pyrazin-3(2H)-one 、 (S)-7-(2-chloropyrimidin-5-yl)-4-phenyl-3,4-dihydro-1H-benzo[4,5]imidazo[2,1-c][1,4]oxazine 在
N,N-二异丙基乙胺 作用下,
以44%的产率得到(S)-7-(5-((S)-4-phenyl-3,4-dihydro-1H-benzo[4,5]imidazo[2,1-c][1,4]oxazin-7-yl)pyrimidin-2-yl)hexahydroimidazo[1,5-a]pyrazin-3(2H)-one