Fremgangsmåde til fremstilling af phthalider

Fremgangsmåde til fremstilling af phthalider

PCT No. PCT/EP97/03137 Sec. 371 Date Dec. 16, 1998 Sec. 102(e) Date Dec. 16, 1998 PCT Filed Jun. 17, 1997 PCT Pub. No. WO98/01437 PCT Pub. Date Jan. 15, 1998The disclosure is a process for preparing a phthalide of the general formula I where R1, R2, R3 and R4 are each independently of the others hyd...

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Hauptverfasser: BECKER, RAINER, NEUHAUSER, HORST, REIF, WOLFGANG, MASSONNE, KLEMENS, GIESELER, ANDREAS, MUNDINGER, KLAUS
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CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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creator BECKER, RAINER
NEUHAUSER, HORST
REIF, WOLFGANG
MASSONNE, KLEMENS
GIESELER, ANDREAS
MUNDINGER, KLAUS
description PCT No. PCT/EP97/03137 Sec. 371 Date Dec. 16, 1998 Sec. 102(e) Date Dec. 16, 1998 PCT Filed Jun. 17, 1997 PCT Pub. No. WO98/01437 PCT Pub. Date Jan. 15, 1998The disclosure is a process for preparing a phthalide of the general formula I where R1, R2, R3 and R4 are each independently of the others hydrogen, C1-C4-alkyl or C1-C4-alkoxy, by catalytic hydrogenation of a phthalic anhydride of the general formula II where R1, R2, R3 and R4 are each as defined above, in a solvent, which comprises using said phthalide I, the reaction product of the catalytic hydrogenation, as solvent.
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HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
title Fremgangsmåde til fremstilling af phthalider
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