(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-[(三甲基甲硅烷基)乙炔基]嘧啶-2-胺 以the product (4S,6S)-4-(5-((2-aminopyrimidin-5-yl)ethynyl)-2-fluorophenyl)-N-(bis(4-methoxyphenyl)(phenyl)methyl)-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine (XVI-52) was obtained after chromatography on silica gel (eluent: heptane-EtOAc; gradient: 0-60% EtOAc) as a light yellow foam (75% yield)的产率得到(4S,6S)-4-(5-((2-aminopyrimidin-5-yl)ethynyl)-2-fluorophenyl)-N-(bis(4-methoxyphenyl)(phenyl)methyl)-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine