(R)-4-isobutyl-2-oxo-3-piperidin-4-yl-imidazolidine-1-carboxylic acid methyl ester 、
[4-(5-formyl-6-methyl-pyridin-2-ylsulfanyl)-phenoxy]-acetic acid tert-buryl ester 、
三乙酰氧基硼氢化钠 以
二氯甲烷 为溶剂,
以to afford (R)-3-{1-[6-(4-tert-butoxycarbonylmethoxy-phenylsulfanyl)-2-methyl-pyridin-3-ylmethyl]-piperidin-4-yl}-4-isobutyl-2-oxo-imidazolidine-1-carboxylic acid methyl ester (89.4 mg, 84%)的产率得到(R)-3-{1-[6-(4-tert-butoxycarbonylmethoxy-phenylsulfanyl)-2-methyl-pyridin-3-ylmethyl]-piperidin-4-yl}-4-isobutyl-2-oxo-imidazolidine-1-carboxylic acid methyl ester