4-[(Z)-4-(4-formyl-2-methoxyphenoxy)-2-butenyl]oxy-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58%的产率得到methyl (2S)-1-[4-[3-methoxy-4-[(Z)-4-[2-methoxy-4-[5-[(2S)-2-methoxycarbonylpyrrolidine-1-carbonyl]-6-methyl-2-sulfanylidene-3,4-dihydro-1H-pyrimidin-4-yl]phenoxy]but-2-enoxy]phenyl]-6-methyl-2-sulfanylidene-3,4-dihydro-1H-pyrimidine-5-carbonyl]pyrrolidine-2-carboxylate