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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 728385Generated: October 30, 2026

Phthalic Anhydride → 4-Methyl-3a,4,5,7a-tetrahydro-2-benzofuran-1,3-dione

https://huagongshe.com/reaction/728385

Reaction equation

Participants

RoleNameHCIDCharge
ReactantPhthalic AnhydrideHCID 6811—
ReactantPenta-1,3-dieneHCID 15301—
Product4-Methyl-3a,4,5,7a-tetrahydro-2-benzofuran-1,3-dioneHCID 12726603—

Reaction Steps

The Diels-Alder adduct from phthalic anhydride and piperylene is hydrolyzed and partially oxidized as in Example 1 and further oxidized as in Examples 1 and 2. Similar results are obtained.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS05047582
Source datasetuspto-grants-1991_09
ORD IDord-7c36a738355c442d9acd8b82c3bdcf53
Source noteuspto-grants-1991_09