锂硼氢 、
(R)-1-[2-(3-methoxycarbonyl-propylsulfanyl)-ethyl]-6-oxo-piperidine-2-carboxylic acid ethyl ester 在
盐酸 、
碳酸氢钠 、 silica gel 、
二氯甲烷 、
methanol-dichloromethane 、 desired product 、
4-[2-((R)-2-hydroxymethyl-6-oxo-piperidin-1-yl)-ethylsulfanyl]-butyric acid methyl ester 、
(R)-1-[2-(4-hydroxybutylsulfanyl)-ethyl]-6-oxo-piperidine-2-carboxylic acid ethyl ester 作用下,
以
二氯甲烷 为溶剂,
反应 4.5h,
以afforded 33 mg (˜23%) of an inseparable mixture of desired product 4-[2-((R)-2-hydroxymethyl-6-oxo-piperidin-1-yl)-ethylsulfanyl]-butyric acid methyl ester and undesired product (R)-1-[2-(4-hydroxybutylsulfanyl)-ethyl]-6-oxo-piperidine-2-carboxylic acid ethyl ester的产率得到4-[2-((R)-2-hydroxymethyl-6-oxo-piperidin-1-yl)-ethylsulfanyl]-butyric acid methyl ester