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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 264779Generated: October 26, 2026

Hippuric Acid → Azlactone

https://huagongshe.com/reaction/264779

Reaction equation

Participants

RoleNameHCIDCharge
ReactantHippuric AcidHCID 464—
ReactantAcetic AnhydrideHCID 7918—
SolventTolueneHCID 1140—
ProductAzlactoneHCID 65073—

Reaction Conditions

Temperature90 °C

Reaction Steps

23.3 gm (0.13 mol) of hippuric acid, 93.05 gm of acetic anhydride, and 50 ml of toluene were charged into a 500 ml eggplant-type flask, and heated on an oil bath at a temperature of 90° C. for 10 minutes to dissolution, followed by immediate quenching the resultant solution. The produced liquid was kept at -20° C. on a dry ice-methanol bath.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS05646291
Source datasetuspto-grants-1997_07
ORD IDord-2db5e132f46d465d95caebbd575099ab
Source noteuspto-grants-1997_07