7.8 Grams of 4-(7-chloro-4-quinolylamino)-benzenesulphonyl chloride hydrochloride [prepared as in Example 1(b)] were added in portions to a stirred mixture of 3.13 grams of 4-amino-1-n-butyl piperidine and 21.2 grams of sodium carbonate in 50 milliliters of water and 50 milliliters of chloroform. After stirring overnight at room temperature, the chloroform layer was separated, washed with water, dried and evaporated to give a brown solid which was triturated with ether to give 5.0 grams of the title compound as the hemihydrate. Melting point 190°-191°C.
