| 摘要 |
1,127,721. Diphenylamine derivatives. J. R. GEIGY A.G. 20 Jan., 1967 [21 Jan., 1966], No. 3183/67. Heading C2C. [Also in Division C4] 5 - Methyl - 2 - aminobenzene - 1 - carboxylic acid is reacted with 1,2-dinitro-4-chlorobenzene, in the presence of K 2 CO 3 , 2-nitro-5-chlorodiphenylamine - 41 - methyl - 2<SP>1 </SP>- carboxylic acid precipitates from the solution as the potassium salt. The free acid is obtained by acidification. 2 - Nitro - 5 - n - butylmercapto - diphenylamine - 2<SP>1</SP> - carboxylic acid is produced by the condensation of 3-chloro-4-nitro-1-n-butylmercaptobenzene with 2-aminobenzene-1-carboxylic acid in the presence of K 2 CO 3 . 2 - Nitro - 5 - n - butylmercapto - diphenylamine - 6 - carboxylic acid is produced by the condensation of 2-nitro-5-chloro-diphenylamine- 6-carboxylic acid with n-butylmercaptan in the presence of K 2 CO 3 . |
