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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 2072407Generated: October 26, 2026

3-Amino-4,7-dichloroindazole-2-carboxylic acid ethyl ester → 3-Amino-4,7-dichloroindazole

https://huagongshe.com/reaction/2072407

Reaction equation

Participants

RoleNameHCIDCharge
Reactant3-Amino-4,7-dichloroindazole-2-carboxylic acid ethyl esterHCID 54162482—
SolventDiethyl PyrocarbonateHCID 3051—
Product3-Amino-4,7-dichloroindazoleHCID 21409234—

Reaction Steps

Analogously to Example 1, 0.15 mol of 3-amino-4,7-dichloroindazole in 100 ml of pyrocarbonic acid diethyl ester gives 3-amino-4,7-dichloroindazole-2-carboxylic acid ethyl ester (melting point: 143°-145° C; 69% of theory) in 5 hours at 50° C.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS04051252
Source datasetuspto-grants-1977_09
ORD IDord-d7da52d7cb0e4911871ed5166e35468b
Source noteuspto-grants-1977_09