SULFONIC ESTER DERIVATIVES AND PROCESS FOR THEIR PREPARATION

摘要

PCT No. PCT/JP83/00300 Sec. 371 Date Apr. 30, 1984 Sec. 102(e) Date Apr. 30, 1984 PCT Filed Sep. 6, 1983 PCT Pub. No. WO84/00959 PCT Pub. Date Mar. 15, 1984.A sulfonic acid ester derivative represented by the general formula wherein R1 is a hydrogen atom, alkyl having 1 to 4 carbon atoms or alkoxy having 1 to 4 carbon atoms, A is a group represented by the general formula (wherein R2 and R3 are each alkyl having 1 to 4 carbon atoms) or by the general formula (wherein R4 and R5 are each alkyl having 1 to 4 carbon atoms or, when taken together with the cabon atom to which they are attached, form cycloalkyl having 4 to 6 carbon atoms), and l is an integer of from 1 to 3, and a process for preparing the derivative.