Back
HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 429525Generated: October 25, 2026

Phthalic Anhydride → N-Hydroxyphthalimide

https://huagongshe.com/reaction/429525

Reaction equation

Participants

RoleNameHCIDCharge
ReactantPhthalic AnhydrideHCID 6811—
ReactantHydroxylammonium phosphate (3:1)HCID 10176537—
SolventWaterHCID 962—
ProductN-HydroxyphthalimideHCID 10665—

Reaction Conditions

Temperature130 °C

Reaction Steps

1.48 g (10.0 mmol) of phthalic anhydride and 0.723 g (3.67 mmol) of hydroxylammonium phosphate were pulverized, mixed and, following the addition of 2 ml of water, heated at a bath temperature of 130° C. for about 1½ hours. The cooled lemon-yellow reaction mixture was diluted with water, and the solid was filtered off with suction, washed with water and dried at 50° C. The yield was 1.39 g (86%).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06316639B1
Source datasetuspto-grants-2001_11
ORD IDord-ffb4abcd931e499bb3815317beb34444
Source noteuspto-grants-2001_11