[EN] NOVEL PROCESS FOR THE PREPARATION OF 2H-CHROMENES<br/>[FR] NOUVEAU PROCEDE DE PREPARATION DE 2H-CHROMENES
申请人:ARPIDA AG
公开号:WO2005014586A1
公开(公告)日:2005-02-17
The invention concerns a novel process for the preparation of 2H-chromenes of formula I and formula 5 and valuable intermediates of formulae 3 and 4 of this process.
本发明涉及一种新的方法,用于制备公式I和公式5的2H-香豆素,以及此方法的公式3和公式4的有价值的中间体。