Pyrrole-2-carboxaldehyde → HCID 86584526, compound

HRID 1860256Notes

Reaction equation

HRID 1860256 reaction equation
[O:1]=[C:2]1[NH:6][C:5]2[S:7][C:8]([C:10]([O:12][CH3:13])=[O:11])=[CH:9][C:4]=2[CH2:3]1.[NH:14]1[CH:18]=[CH:17][CH:16]=[C:15]1[CH:19]=O>N1CCCCC1.CC(O)C>[O:1]=[C:2]1[NH:6][C:5]2[S:7][C:8]([C:10]([O:12][CH3:13])=[O:11])=[CH:9][C:4]=2/[C:3]/1=[CH:19]/[C:15]1[NH:14][CH:18]=[CH:17][CH:16]=1

Participants

5

Reactant 2

HCID 13854Pyrrole-2-carboxaldehydeHCID 18627003HCID 18627003, compound

Product 1

HCID 86584526HCID 86584526, compoundYield 18.2%

Reagents, catalysts & solvents 2

HCID 3776IsopropanolSolventHCID 8082PiperidineSolvent

Conditions

Temperature
75 °C

Procedure

Methyl 5,6-dihydro-5-oxo-4H-thieno[2,3-b]pyrrole-2-carboxylate (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 methyl (Z)-5,6-dihydro-5-oxo-4-[(1H-pyrrol-2-yl)methylene]-4H-thieno[2,3-b]pyrrole-2-carboxylate as a yellow solid. MS(ES): m/e 275 [M+H].

Workup

  1. filtrationthe precipitated solid was collected by filtration
  2. washwashed with water

Sources & evidence

ORD record
ord-5f8f047589c84ce28761b24dcc4a0de9
Source dataset
uspto-grants-2003_03
Patent number
US06528653B2

Reaction notes

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