methyl 1H-pyrrole-3-carboxylate → Methyl 5-(3,4-Dichlorophenylthio)pyrrole-3-carboxylate
Reaction equation
[NH:1]1[CH:5]=[CH:4][C:3]([C:6]([O:8][CH3:9])=[O:7])=[CH:2]1.[Cl:10][C:11]1[CH:12]=[C:13]([S:18]Cl)[CH:14]=[CH:15][C:16]=1[Cl:17]>>[Cl:10][C:11]1[CH:12]=[C:13]([S:18][C:5]2[NH:1][CH:2]=[C:3]([C:6]([O:8][CH3:9])=[O:7])[CH:4]=2)[CH:14]=[CH:15][C:16]=1[Cl:17]Participants
3
Procedure
By the procedure of Example 23, methyl pyrrole-3-carboxylate (2.5 g., 20 mmoles) was reacted with 3,4-dichlorobenzenesulfenyl chloride (4.24 g., 20 mmoles) to yield crude product (6.3 g., oil). The crude was chromatographed on 250 g. of silica gel, with 125 ml. fractions of the ethyl acetate-1/hexane-5/5% acetic acid eluant collected. Fractions 2 to 6 were combined and evaporated to dryness to afford purified methyl 5-(3,4-dichlorophenylthio)pyrrole-3-carboxylate (2.76 g., m.p. 93°-96° C.).
Sources & evidence
- ORD record
- ord-e6a16edaa1234635bcc2cc5a3928e6d3
- Source dataset
- uspto-grants-1982_09
- Patent number
- US04351843
Reaction notes
Loading…