公开(公告)号：BR7309875D0

公开(公告)日：1974-08-29

申请号：BR987573

申请日：1973-12-17

Applicant: HOECHST AG

Inventor： SAHM W

IPC: C07D307/78 ,  B01J10/00 ,  C07D307/77 ,  C07D307/79 ,  C07D307/80 ,  C07D307/87 ,  C07D307/92 ,  C07D407/02 ,  C07D409/06 ,  C07D413/04 ,  C09B57/00 ,  D06L3/12 ,  C07D85/44 ,  C07D5/40

Abstract: Novel azomethines are obtained when reacting a tertiary amine with an aromatic aldehyde or ketone having in orthoposition an activated methoxy group. These azomethines are capable of ring closure to yield a benzofurane and said tertiary amine. The benzofuranes are optical brighteners tranquilizers or intermediates for optical brighteners, fluorescent dyestuffs, scintiallators, sensibilizers for electrophotographic coatings.