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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1184873Generated: November 1, 2026

Thionyl Chloride → Thieno[2,3-b]pyrazine-6-carbonyl chloride

https://huagongshe.com/reaction/1184873

Reaction equation

Participants

RoleNameHCIDCharge
ReactantThionyl ChlorideHCID 24386—
ReactantThieno[2,3-b]pyrazine-6-carboxylic acidHCID 7164578—
ProductThieno[2,3-b]pyrazine-6-carbonyl chlorideHCID 86680174100%

Reaction Steps

A solution of thieno[2,3-b]pyrazine-6-carboxylic acid (400 mg, 2.220 mmol) in thionyl chloride (1.6 mL, 22.20 mmol) was heated to 80° C. for 2 h. Concentrated to dryness and coevaporated with toluene to give thieno[2,3-b]pyrazine-6-carbonyl chloride 63 (441 mg, 100%).

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS08669256B2
Source datasetuspto-grants-2014_03
ORD IDord-9f22d6a82e7842899db951deb787e8c2
Source noteuspto-grants-2014_03