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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 2234668Generated: October 30, 2026

Hydrochloric Acid → 5-bromo-3-(2-ethyl-2H-pyrazol-3-yl)-1H-pyrrolo[2,3-b]pyridine

https://huagongshe.com/reaction/2234668

Reaction equation

Participants

RoleNameHCIDCharge
ReactantHydrochloric AcidHCID 313—
Reactant5-bromo-3-[1-(2-ethyl-2H-pyrazol-3-yl)-2-methoxy-vinyl]-pyridin-2-ylamineHCID 68691856—
SolventEthanolHCID 702—
Product5-bromo-3-(2-ethyl-2H-pyrazol-3-yl)-1H-pyrrolo[2,3-b]pyridineHCID 13596202159.1%

Reaction Conditions

Temperature100 °C

Reaction Steps

5-Bromo-3-[1-(2-ethyl-2H-pyrazol-3-yl)-2-methoxy-vinyl]-pyridin-2-ylamine (602 mg, 1.86 mmol), ethyl alcohol (30 ml), and concentration hydrochloric acid (30 ml) were combined and stirred at 100° C. for 18 hours. The reaction was quenched with sodium bicarbonate solution and the product was filtered off. The filtered product was dried under high vacuum to give 320 mg (59%) of 5-bromo-3-(2-ethyl-2H-pyrazol-3-yl)-1H-pyrrolo[2,3-b]pyridine. MS: m/z 291.3+293.3 (M+H+).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07709645B2
Source datasetuspto-grants-2010_05
ORD IDord-37ccabf124d047b9a6be206184050a1c
Source noteuspto-grants-2010_05