申请人:National Starch and Chemical Investment
Holding Corporation
公开号:EP0257309A2
公开(公告)日:1988-03-02
A multi-step process for the preparation of ethynylbenzaldehydes from bromo- or iodobenzaldehydes is disclosed. The arylhalogen is replaced with a protected ethynyl compound which is subsequently cleaved by base to form the arylacetylene. The aldehydic functionality is preserved by formation of a corresponding Schiff's base or acetal, and its subsequent regeneration by treatment with aqueous acid.
本发明公开了一种从溴或碘苯甲醛制备乙炔基苯甲醛的多步骤工艺。芳基卤素被受保护的乙炔化合物取代,随后乙炔化合物被碱裂解形成芳基乙炔。通过形成相应的希夫碱或缩醛来保留醛官能团,然后再通过水酸处理使其再生。