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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1860250Generated: November 3, 2026

Pyrrole-2-carboxaldehyde → HCID 9921396, compound

https://huagongshe.com/reaction/1860250

Reaction equation

Participants

RoleNameHCIDCharge
ReactantPyrrole-2-carboxaldehydeHCID 13854—
ReactantHCID 18626983HCID 18626983—
SolventIsopropanolHCID 3776—
SolventPiperidineHCID 8082—
ProductHCID 9921396HCID 992139634%

Reaction Conditions

Temperature75 °C

Reaction Steps

5,6-Dihydro-5-oxo-4H-thieno[2,3-b]pyrrole-2-carboxamide (30 mg, 0.17 mmol) was dissolved in a solution of 1% piperidine in 2-propanol (2 ml). Pyrrole-2-carboxaldehyde (16 mg, 0.18 mmol) was added in one portion and the mixture heated at 75° C. for 1 hour. The reaction mixture was poured into an ice/water mixture (10 ml) and the precipitated solid was collected by filtration and washed with water to give 15 mg of (Z)-5,6-dihydro-5-oxo-4-[(1H-pyrrol-2-yl)methylene]-4H-thieno[2,3-b]pyrrole-2-carboxamide as a yellow/brown solid.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06528653B2
Source datasetuspto-grants-2003_03
ORD IDord-8b5fb51f5d0f406c9f50f0e68870f86a
Source noteuspto-grants-2003_03