5,6-dideoxy-1,2-O-isopropylidene-3-O-methyl-alpha-D-xylo-hex-5-enofuranose 、
dithiocarbonic acid S-(3,3-dimethoxy-2-oxo-propyl) ester O-ethyl ester 在
过氧化双月桂酰 作用下,
以
1,2-二氯乙烷 为溶剂,
以78%的产率得到S-((R)-5,5-dimethoxy-1-((3aR,5S,6R,6aR)-6-methoxy-2,2-dimethyltetrahydrofuro[2,3-d][1,3]dioxol-5-yl)-4-oxopentyl) O-ethyl carbonodithioate