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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1881537Generated: November 2, 2026

Thionyl Chloride → 5-Methoxycarbonyl-2-thiophenecarboxylic acid hydrazide

https://huagongshe.com/reaction/1881537

Reaction equation

Participants

RoleNameHCIDCharge
ReactantThionyl ChlorideHCID 24386—
ReactantHydrazine hydrate (1:1)HCID 24654—
Reactant5-(Methoxycarbonyl)thiophene-2-carboxylic acidHCID 818352—
Product5-Methoxycarbonyl-2-thiophenecarboxylic acid hydrazideHCID 1487196172%

Reaction Steps

The known procedure disclosed in the literature (J. Heterocyclic Chem., 28, 17, (1991).) was followed using 5-methoxycarbonyl-2-thiophenecarboxylic acid synthesized in Reference Synthetic Example 38, thionyl chloride and hydrazine monohydrate to give 144 mg of the desired product as a white solid (yield 72%).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS08318796B2
Source datasetuspto-grants-2012_11
ORD IDord-ec363db9da67441186960927654e0274
Source noteuspto-grants-2012_11