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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 1860254Generated: November 2, 2026

Pyrrole-2-carboxaldehyde → HCID 9964774, compound

https://huagongshe.com/reaction/1860254

Reaction equation

Participants

RoleNameHCIDCharge
ReactantPyrrole-2-carboxaldehydeHCID 13854—
ReactantHCID 18626995HCID 18626995—
SolventIsopropanolHCID 3776—
SolventPiperidineHCID 8082—
ProductHCID 9964774HCID 996477420.7%

Reaction Conditions

Temperature75 °C

Reaction Steps

5,6-Dihydro-5-oxo-4H-thieno[2,3-b]pyrrole-2-carbonitrile (32 mg, 0.2 mmol) was dissolved in a solution of 1% piperidine in 2-propanol (1 ml). Pyrrole-2-carboxaldehyde (37 mg, 0.39 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 (6 ml) and the precipitated solid was collected by filtration and washed with water to give 10 mg of (Z)-5,6-dihydro-5-oxo-4-[(1H-pyrrol-2-yl)methylene]-4H-thieno[2,3-b]pyrrole-2-carbonitrile as a yellow solid. MS(ES): m/e 242 [M+H].

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS06528653B2
Source datasetuspto-grants-2003_03
ORD IDord-1fe29018f99442c4a16aa98c359122df
Source noteuspto-grants-2003_03