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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1155481Generated: October 25, 2026

4-Methylphthalic anhydride → Isoprene

https://huagongshe.com/reaction/1155481

Reaction equation

Participants

RoleNameHCIDCharge
Reactant4-Methylphthalic anhydrideHCID 88069—
ReactantSulfurHCID 5362487—
ReactantTetrahydro-4-methylphthalic anhydrideHCID 12726604—
ProductIsopreneHCID 6557—
ProductMaleic AnhydrideHCID 7923—

Reaction Steps

4-Methylphthalic anhydride is also able to be prepared by dehydrogenation, with sulfur, of tetrahydro-4-methylphthalic anhydride obtained from the reaction between isoprene and maleic anhydride: ##STR4##

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS04302396
Source datasetuspto-grants-1981_11
ORD IDord-a68eb8af74494a68a8c98191dc52d72b
Source noteuspto-grants-1981_11