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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1824320Generated: October 31, 2026

Ammonium Hydroxide → 1-Fluoro-4-hydroxycarbazole

https://huagongshe.com/reaction/1824320

Reaction equation

Participants

RoleNameHCIDCharge
ReactantAmmonium HydroxideHCID 14923—
ReactantPyridinium chlorideHCID 10176127—
Reactant1-Fluoro-4-methoxycarbazoleHCID 22147796—
Product1-Fluoro-4-hydroxycarbazoleHCID 22147820114.5%

Reaction Steps

A mixture of 1-fluoro-4-methoxycarbazole (438 mg, 2.04 mmol) and pyridine hydrochloride (3 g) was placed into an oil bath that was preheated to 220° C. After 20 minutes, the reaction was poured onto a mixture of ice and concentrated ammonium hydroxide. The product was extracted into ethyl acetate and the extract was dried over magnesium sulfate, filtered, and concentrated in vacuo. The residue was azeotroped with toluene to give 470 mg of the title compound.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07041684B2
Source datasetuspto-grants-2006_05
ORD IDord-b810c40afb01477aa492cd5f8a18a47f
Source noteuspto-grants-2006_05