N-[3-[3-amino-6-(difluoromethylidene)-5-ethyl-2H-1,4-oxazin-5-yl]-4-fluorophenyl]-5-methoxypyrazine-2-carboxamide 在
palladium 10% on activated carbon 、
氢气 作用下,
以
甲醇 为溶剂,
以11%的产率得到cis-rac-N-{3-[5-amino-2-(difluoromethyl)-3-ethyl-3,6-dihydro-2H-1,4-oxazin-3-yl]-4-fluorophenyl}-5-methoxypyrazine-2-carboxamide