| 摘要 |
The invention concerns a process for preparing phthalides of general formula (I) in which R<1>, R<2>, R<3> and R<4>, independently of each, other mean hydrogen, C1-C4 alkyl or C1-C4 alkoxy, by the catalytic hydrogenation of phthalic acid anhydrides of general formula (II), in which the groups R<1>, R<2>, R<3> and R<4> have the above meanings, in a solvent, the phthalide (I), which is produced as a reaction product during the catalytic hydrogenation process, being used as solvent.
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| 申请人 |
BASF AG, 67063 LUDWIGSHAFEN, DE |
发明人 |
MASSONNE, KLEMENS, DR., 67368 WESTHEIM, DE;BECKER, RAINER, DR., 67098 BAD DUERKHEIM, DE;REIF, WOLFGANG, DR., 67227 FRANKENTHAL, DE;NEUHAUSER, HORST, DR., 67373 DUDENHOFEN, DE;GIESELER, ANDREAS, DR., 67098 BAD DUERKHEIM, DE;MUNDINGER, KLAUS, DR., 67117 LIMBURGERHOF, DE |
