prov:value
| - Chem., 40, 2017 (1997)), with an sulfonyl chloride (II) wherein R1 and R2 each has the same meaning as in the compound of the formula (I), in the presence of a base such as sodium amide, lithium amide, sodium hydride, potassium carbonate, potassium tert-butoxide, triethylamine, ethyldiisopropylamine, pyridine or DBU in a solvent such as dioxane, THF, acetone, DMF, DMSO, chloroform, pyridine or a m
|