(S)-4-Methyl-5-oxo-pentanoic acid methyl ester 、
3-戊酮 、 alkaline earth salt of/the/ methylsulfuric acid 在
N,N-二异丙基乙胺 作用下,
生成
(4S,5R,6S)-5-Hydroxy-4,6-dimethyl-7-oxo-nonanoic acid methyl ester 、
(4S,5R,6R)-5-Hydroxy-4,6-dimethyl-7-oxo-nonanoic acid methyl ester 、
(4S,5S,6R)-5-Hydroxy-4,6-dimethyl-7-oxo-nonanoic acid methyl ester