(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