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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1353679Generated: October 27, 2026

Water → ethyl 3-(4-fluorophenyl)-1H-indazole-5-carboxylate

https://huagongshe.com/reaction/1353679

Reaction equation

Participants

RoleNameHCIDCharge
ReactantWaterHCID 962—
ReactantPyridineHCID 1049—
ReactantAmmonium HydroxideHCID 14923—
Reactant1-acetyl-3-(4-fluorophenyl)-1H-indazole-5-carbonyl chlorideHCID 22480227—
SolventEthanolHCID 702—
Productethyl 3-(4-fluorophenyl)-1H-indazole-5-carboxylateHCID 22479944100%

Reaction Steps

To a solution of 1-acetyl-3-(4-fluorophenyl)-1H-indazole-5-carbonyl chloride (100 mg, 0.33 mmol) in ethanol (40 mL) was added pyridine (0.5 mL). The reaction was stirred overnight at room temperature when saturated ammonium hydroxide (1 mL) was added. The reaction was stirred overnight when water (150 mL) was added and the solution filtered. The solid was dried to recover the product (100 mg, 100% yield). 1H NMR (DMSO-d6) δ 13.6 (s, 1H), 8.62 (s, 1H), 8.03–7.9 (m, 3H), 7.70 (d, 1H), 7.61 (d, 1H), 7.42 (t, 2H); ES-MS (m/z) 285 [M+1]+.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS07220771B2
Source datasetuspto-grants-2007_05
ORD IDord-6d2c8f7fe01d468bb11ea954ee77f18c
Source noteuspto-grants-2007_05