4,4'-(propane-1,3-diyl-bis-oxy)-bis-(3-methoxybenzaldehyde) 、
1-(3-oxobutyryl)pyrrolidine-2-carboxylic acid methyl ester 、
硫脲 在
cerium(III) chloride heptahydrate 作用下,
以
乙腈 为溶剂,
以65%的产率得到methyl (2S)-1-[4-[3-methoxy-4-[3-[2-methoxy-4-[5-[(2S)-2-methoxycarbonylpyrrolidine-1-carbonyl]-6-methyl-2-sulfanylidene-3,4-dihydro-1H-pyrimidin-4-yl]phenoxy]propoxy]phenyl]-6-methyl-2-sulfanylidene-3,4-dihydro-1H-pyrimidine-5-carbonyl]pyrrolidine-2-carboxylate