公开(公告)号：BR9608495A

公开(公告)日：1999-07-06

申请号：BR9608495

申请日：1996-05-24

Applicant: BASF AG

Inventor： HOLDERBAUM MARTIN ,  BECKER KARL ,  AUMUELLER ALEXANDER ,  WITZEL TOM ,  VOIT GUIDO

IPC: C07C253/30 ,  C07C255/41

Abstract: PCT No. PCT/EP96/02238 Sec. 371 Date Dec. 1, 1997 Sec. 102(e) Date Dec. 1, 1997 PCT Filed May 24, 1996 PCT Pub. No. WO96/38409 PCT Pub. Date Dec. 5, 1996A process for preparing 2-cyano-3,3-diarylacrylic esters of the general formula I where R1 and R2 are hydrogen, C1-C12-alkyl groups, C-C12-alkoxy groups or di(C1-C4-alkyl)amino groups and R3 is a C4-C18-alkyl group which can be interrupted by ether-functional oxygen atoms, by reacting a benzophenone imine of the general formula II with a cyanoacetic ester of the general formula III wherein the reaction is carried out at from 20 to 60 DEG C. and, during this, the liberated ammonia is continuously removed from the reaction mixture with the aid of a stream of gas or by reducing the pressure to from 900 to 100 mbar.