(4S,6S)-4-(5-bromo-3-chlorothiophen-2-yl)-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine 、
[5-(丙炔-1-基)吡啶-3-基]硼酸 以the title compound was obtained after chromatography on silica gel (eluent: heptane-EtOAc; gradient: 0-65% EtOAc) as a light brown foam (19% yield)的产率得到(4S,6S)-4-(3-chloro-5-(5-(prop-1-ynyl)pyridin-3-yl)thiophen-2-yl)-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine