Efficient general method for sulfamoylation of a hydroxyl group

The application of N,N-dimethylacetamide or 1-methyl-2-pyrrolidone as solvent clearly accelerated the sulfamoylation reaction of a hydroxyl group compared with the solvents used so far. The target sulfamates were obtained in the highest yield without a base. It became clear that 2 equiv. of sulfamoyl chloride to the starting material was sufficient to complete the reaction. It was confirmed that this condition could be applied to extensive hydroxyl groups.