公开(公告)号：DE2133159A1

公开(公告)日：1973-01-18

申请号：DE2133159

申请日：1971-07-03

Applicant: HOECHST AG

Inventor： HORN ANTON DR ,  ROESCH GUENTER ,  SCHNABEL GUENTER DR

IPC: C07C51/60 ,  C07C243/38 ,  C07D249/08 ,  C07D55/06

公开(公告)号：DE2238628A1

公开(公告)日：1973-03-29

申请号：DE2238628

申请日：1972-08-05

Applicant: HOECHST AG

Inventor： SAHM WILFRIED DR ,  HORN ANTON DR

IPC: C09K3/00 ,  C07C45/70 ,  C07C45/71 ,  C07C47/575 ,  C07C49/84 ,  C07C205/35 ,  C07D263/56 ,  C07D263/60 ,  C07D307/77 ,  C07D307/79 ,  C07D307/81 ,  C07D307/92 ,  C07D307/93 ,  C07D413/04 ,  C07D5/40

Abstract: Benzofuranes are obtained by intramolecular condensation of aromatic oxo compounds having an oxymethylene group in ortho position. The condensation is effected with strongly alkaline agents in solution or in an alkali metal hydroxide melt. The products are useful as scintilators and optical brighteners.