公开(公告)号：DE1923702A1

公开(公告)日：1970-11-19

申请号：DE1923702

申请日：1969-05-09

Applicant: HOECHST AG

Inventor： HELMUT MENGLER DR ,  ROESCH GUENTER ,  ERICH SCHINZEL DR ,  OTTO SMERZ DR

IPC: C07D231/06 ,  D06L3/12 ,  D06L4/65

Abstract: 2-pyrazoline cpds. used as optical brighteners. Cpds. of formula:- (where R and R' are opt. subst. aryl, pref. phenyl, particularly p- chlorophenyl and X is vinyl or -CH2-CH2-Y, and Y is residue of hydrogen-active group) are obtained by condensing dibenzal cpds. of formula R-CH=CH-CO-CH=CH-R' at 60-130 degrees C with 4-hydrazino-phenyl-beta-hydroxyethylsulphone, opt. converting styryl pyrazolines obtained to mineral acid ester, opt. converting these to vinylsulphone cpds. and opt. adding to them hydrogen-active cpds. of formula H-Y.