(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 、
6-氯吡嗪-2-硼酸频那醇酯 以the product (4S,6S)—N-(bis(4-methoxyphenyl)(phenyl)methyl)-4-(5-(6-chloropyrazin-2-yl)-2-fluorophenyl)-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine (XIII-5) was obtained after chromatography on silica-NH2 gel (eluent: heptane-EtOAc; gradient: 0-25% EtOAc) as a white foam (21% yield)的产率得到(4S,6S)-N-(bis(4-methoxyphenyl)(phenyl)methyl)-4-(5-(6-chloropyrazin-2-yl)-2-fluorophenyl)-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine