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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 2227770Generated: October 29, 2026

Ammonium Hydroxide → 1-Fluoro-4-hydroxycarbazole

https://huagongshe.com/reaction/2227770

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 numberUS06413991B1
Source datasetuspto-grants-2002_07
ORD IDord-6bde517873784081ae1836b84b2838a7
Source noteuspto-grants-2002_07