N2-(tert-butoxycarbonyl)-N3-(4-methoxyfumaroyl)-L-2,3-diaminopropanoic acid p-nitrophenyl ester 、
(S)-Amino-[(2R,3S,4R,5R)-5-(2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-3,4-dihydroxy-tetrahydro-furan-2-yl]-acetic acid; hydrochloride 在
N,N-二异丙基乙胺 作用下,
以
二甲基亚砜 为溶剂,
反应 17.0h,
生成 (E)-3-[(S)-2-tert-Butoxycarbonylamino-2-({(S)-carboxy-[(2R,3S,4R,5R)-5-(2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl)-3,4-dihydroxy-tetrahydro-furan-2-yl]-methyl}-carbamoyl)-ethylcarbamoyl]-acrylic acid methyl ester