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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 638355Generated: October 30, 2026

3a,4,7,7a-Tetrahydro-5-methyl-1,3-isobenzofurandione → 4-Methylphthalic anhydride

https://huagongshe.com/reaction/638355

Reaction equation

Participants

RoleNameHCIDCharge
Reactant3a,4,7,7a-Tetrahydro-5-methyl-1,3-isobenzofurandioneHCID 98496—
ReactantSulfurHCID 5362487—
CatalystZinc OxideHCID 3007857—
Product4-Methylphthalic anhydrideHCID 88069—

Reaction Steps

reacting the 4-methyl-1,2,3,6-tetrahydrophthalic anhydride with sulfur in the presence of zinc oxide and 2-mercaptobenzothizole as a catalyst to form 4-methylphthalic anhydride and a thio derivative;

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS04560772
Source datasetuspto-grants-1985_12
ORD IDord-cc26ff2eb4654056b73188bbfb839f2a
Source noteuspto-grants-1985_12