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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1031772Generated: October 25, 2026

Sulfuric Acid → 9-Hydroxy-5-benzo[a]phenoxazone-8-carboxylic acid 12-oxide

https://huagongshe.com/reaction/1031772

Reaction equation

Participants

RoleNameHCIDCharge
ReactantSulfuric AcidHCID 1118—
Reactant2,6-Dihydroxybenzoic AcidHCID 9338—
Reactant(1Z)-2-Hydroxynaphthoquinone 1-oximeHCID 264074—
Product9-Hydroxy-5-benzo[a]phenoxazone-8-carboxylic acid 12-oxideHCID 56634389—

Reaction Steps

2.84 g. 1,3-dihydroxy-4-nitrosonaphthalene, 2.31 g. 2,6-dihydroxybenzoic acid, 1.29 g, pyrolusite and 1.6 ml. concentrated sulphuric acid are reacted analogously to Example 1(a). Yield 2.8 g.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS04954630
Source datasetuspto-grants-1990_09
ORD IDord-fb9a7b54fcd24343979624d0d171f2c0
Source noteuspto-grants-1990_09