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公开(公告)号：ES2215780T3
公开(公告)日：2004-10-16
申请号：ES00987303
申请日：2000-11-27
Applicant: BASF AG
Inventor： GITZ ROLAND , GITZ NORBERT , KEIL MICHAEL , WOLF BERND , STEINMETZ ADRIAN , STAMM ARMIN
Abstract: A process for preparing o-chloromethylbenzoyl chlorides of the formula I,in which R to R can be identical or different and are hydrogen, C1-C4-alkyl, halogen or trifluoromethyl, by reacting benzo-fused lactones of the formula II,in which R to R are as defined above, with thionyl chloride, which comprises carrying out the reaction in the presence of catalytic amounts of boric acid, boric anhydride, borate, boronic acid or boronic acid esters and catalytic amounts of a quaternary ammonium salt is described.
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