1-乙酰哌嗪 、 (8R)-6-[3,5-bis(trifluoromethyl)benzyl]-8-methyl-2-methylsulfonyl-4-(2-methylphenyl)-6,7,8,9-tetrahydro-5H-pyrimido[4,5-b][1,5]oxazocin-5-one 以
四氢呋喃 、
甲醇 为溶剂,
以84%的产率得到(8R)-2-(4-acetyl-1-piperazinyl)-6-[3,5-bis(trifluoromethyl)benzyl]-8-methyl-4-(2-methylphenyl)-6,7,8,9-tetrahydro-5H-pyrimido[4,5-b][1,5]oxazocin-5-one