In the first method, a compound of the formula (II); ##STR8## is reacted with a sulfamoyl chloride of the formula CISO2 NR1 R2, where R1 and R2 are as defined above, in the presence of a base such as potassium t-butoxide, sodium hydride, triethylamine, or pyridine at a temperature of about -60??? to about 25??? C. in an aprotic solvent such as toluene, ethyl acetate, tetrahydrofuran, acetonitrile