(4S,6S)-N-(bis(4-methoxyphenyl)(phenyl)methyl)-4-(2-fluoro-5-iodophenyl)-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine 、
5-methoxy-2-((trimethylsilyl)ethynyl)pyrimidine 以the product (4S,6S)—N-(bis(4-methoxyphenyl)(phenyl)methyl)-4-(2-fluoro-5-((5-methoxypyrimidin-2-yl)ethynyl)phenyl)-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine (XVI-5) was obtained after chromatography on silica gel (eluent: heptane-EtOAc; gradient: 0-50% EtOAc) as a light yellow foam (72% yield)的产率得到(4S,6S)-N-(bis(4-methoxyphenyl)(phenyl)methyl)-4-(2-fluoro-5-((5-methoxypyrimidin-2-yl)ethynyl)phenyl)-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine