Cl[C:2](Cl)([O:10][C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1)[O:3][C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1.[CH3:18][S:19]([NH2:22])(=[O:21])=[O:20]>CCOC(C)=O>[CH3:18][S:19]([N:22]=[C:2]([O:10][C:11]1[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1)[O:3][C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1)(=[O:21])=[O:20]Dichlorodiphenoxymethane (2 g, 7.46 mmol) and methylsulfonamide (1.56 g, 16.41 mmol) were dissolved in EtOAc (15 ml) and heated to reflux for 12 hours. The mixture was allowed to cool and was concentrated under vacuum. Purification of the crude mixture by flash chromatography (20% EtOAc/hexanes) afforded diphenyl methylsulfonylcarbonimidate (0.75 g, 2.59 mmol, 35%).
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