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

HRID 466794

Reaction equation

[C:1]1(=[O:11])[O:6][C:4](=[O:5])[C:3]2=[CH:7][CH:8]=[CH:9][CH:10]=[C:2]12.[CH2:12]=CC=CC>>[CH3:12][CH:10]1[CH2:9][CH:8]=[CH:7][CH:3]2[C:4]([O:6][C:1](=[O:11])[CH:2]12)=[O:5]

Participants

Reactant 2

HCID 6811Phthalic Anhydride

HCID 15301Penta-1,3-diene

Product 1

HCID 127266034-Methyl-3a,4,5,7a-tetrahydro-2-benzofuran-1,3-dione

Procedure

The Diels-Alder adduct from phthalic anhydride and piperylene is hydrolysed and partially oxidized as in Example 10 and further oxidized as in Example 11. Similar results are obtained.

Workup

customSimilar results
customare obtained

Sources & evidence

ORD record: ord-d1e2e69b7de34c96b145aef6b890475d
Source dataset: uspto-grants-1992_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05157152

Linked notes

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