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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 506791Generated: November 2, 2026

Phosphorus oxychloride → 4-Chloro-5-fluoro-1H-pyrrolo(2,3-b)pyridine

https://huagongshe.com/reaction/506791

Reaction equation

Participants

RoleNameHCIDCharge
ReactantPhosphorus oxychlorideHCID 24813—
ReactantHCID 178526273HCID 178526273—
Product4-Chloro-5-fluoro-1H-pyrrolo(2,3-b)pyridineHCID 49761611—

Reaction Steps

4-Chloro-5-fluoro-1H-pyrrolo[2,3-b]pyridine can be obtained as in example 4 stage 4(b) but starting from 1.7 g of 5-fluoro-1H-pyrrolo[2,3-b]pyridine 7-oxide in 10 cm3 of phosphorus oxychloride. In this way, 1.3 g of 4-chloro-5-fluoro-1H-pyrrolo[2,3-b]pyridine is obtained as a solid with the following characteristics:

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07786114B2
Source datasetuspto-grants-2010_08
ORD IDord-bba8f1fc49fe4e189565ea6513710e81
Source noteuspto-grants-2010_08