| 摘要 |
1351489 Bisstyrylbenzene derivatives BADISCHE ANILIN- & SODA-FABRIK AG 11 Aug 1971 [12 Aug 1970] 37678/71 Heading C2C [Also in Division D1] The invention comprises optical brighteners of the formula where X is H, Cl, CH 3 ; OCH 3 or OC 2 H 5 , Y is H, Cl, OH 3 , OCH 3 or OC 2 H 5 , X and Y not being both H at the same time, Z is H, Cl, CH 3 or OCH 3 , R and R<SP>1</SP> are carbalkoxy, carbamoyl, substituted carbamoyl, CONHNH 2 or CONHN(CH 3 ) 2 or in the free acid form of the optical brightener are COOH or CONHNH(CH 2 ) n SO 3 H where n is 0-4. The compounds areprepared by reacting a compound of the formula with either (a) a compound of the formula or a mixture thereof or (b) a compound of the formula followed in case (b) by the introduction of a different radical R or R<SP>1</SP> in place of the COOCH 3 or COOO 2 H 5 radical. |
