(2R,4R)-5-(tert-Butyl-diphenyl-silanyloxy)-4-methyl-2-sulfamoyloxy-pentanoic acid ethyl ester 在
dirhodium tetraacetate 、
碘苯二乙酸 、
magnesium oxide 作用下,
以
二氯甲烷 为溶剂,
以80%的产率得到(4S,6R)-4-(tert-Butyl-diphenyl-silanyloxymethyl)-4-methyl-2,2-dioxo-2λ
6-[1,2,3]oxathiazinane-6-carboxylic acid ethyl ester