abstract |
1,191,801. Sulphonic acids. AGFA-GEVAERT A.G. 1 April, 1968 [30 March, 1967], No. 15503/68. Heading C2C. [Also in Divisions C4 and G2] Butanesultone is added to p-nitrophenol in boiling aqueous NaOH, and the reaction mixture treated with NaCl to yield 4-nitrophenyl-#- sulphobutyl ether which is then hydrogenated to 4 - aminophenyl - # - sulphobutyl ether. |