(S)-3-amino-3-(3-nitrophenyl)pentanoic acid methyl ester 、
N-BOC-N'-甲基硫脲 以the product [(S)-4-ethyl-1-methyl-4-(3-nitro-phenyl)-6-oxo-1,4,5,6-tetrahydro-pyrimidin-2-yl]-carbamic acid tert-butyl ester (372 mg) was obtained as white solid的产率得到[(S)-4-ethyl-1-methyl-4-(3-nitrophenyl)-6-oxo-1,4,5,6-tetrahydro-pyrimidin-2-yl]carbamic acid tert-butyl ester