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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1636983Generated: November 1, 2026

Phthalide → Phthalic Anhydride

https://huagongshe.com/reaction/1636983

Reaction equation

Participants

RoleNameHCIDCharge
ReactantPhthalideHCID 6885—
ReactantN-HydroxyphthalimideHCID 10665—
SolventBenzonitrileHCID 7505—
ProductPhthalic AnhydrideHCID 681146%

Reaction Conditions

Temperature100 °C

Reaction Steps

A mixture of 2 mmole of phthalide, 2 mole % of N-hydroxyphthalimide relative to phthalide, and 5 ml of benzonitrile was stirred for 12 hours at 100° C. under an oxygen atmosphere. The products in the reaction mixture were analyzed by gas chromarography, and, as a result, phthalic anhydride (yield 46%) was formed.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06037477
Source datasetuspto-grants-2000_03
ORD IDord-7cdb84eb4f64450f99b227b50ca39e12
Source noteuspto-grants-2000_03