That is, the compound can be produced by reacting an amine represented by the compound (III) wherein R3 and R4 each has the same meaning as in the compound of the formula (I), 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