(4S,6S)-N-(bis(4-methoxyphenyl)(phenyl)methyl)-4-(5-bromo-2-fluorophenyl)-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine 、
3-氰基吡啶-5-硼酸频哪醇酯 以the product 5-(3-((4S,6S)-2-(bis(4-methoxyphenyl)(phenyl)methylamino)-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-4-yl)-4-fluorophenyl)nicotinonitrile (XIII-2) was obtained after chromatography on silica-NH2 gel (eluent: heptane-EtOAc; gradient: 0-20% EtOAc) as a white solid (81% yield)的产率得到5-(3-((4S,6S)-2-(bis(4-methoxyphenyl)(phenyl)methylamino)-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-4-yl)-4-fluorophenyl)nicotinonitrile