Triethylamine → HCID 18376783, compound

HRID 844167Notes

Reaction equation

HRID 844167 reaction equation
[CH3:1][O:2][C:3]([C:5]1[S:6][CH:7]=[C:8]([CH2:11][OH:12])[C:9]=1[Cl:10])=[O:4].C(N(CC)CC)C.[CH3:20][S:21](Cl)(=[O:23])=[O:22]>C(Cl)Cl>[CH3:1][O:2][C:3]([C:5]1[S:6][CH:7]=[C:8]([CH2:11][O:12][S:21]([CH3:20])(=[O:23])=[O:22])[C:9]=1[Cl:10])=[O:4]

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 31297Methanesulfonyl chlorideHCID 18376992HCID 18376992, compound

Product 1

HCID 18376783HCID 18376783, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of 2-methoxycarbonyl-3-chloro-4-hydroxymethylthiophene (6 g, 29 mmol) in methylene chloride (100 mL) were added triethylamine (8.1 mL, 58 mmol) and methanesulfonyl chloride (2.5 mL, 32 mmol) at ambient temperature. After stirring for 6 hours, the reaction mixture was concentrated to afford 2-methoxycarbonyl-3-chloro-4-(methylsulfonyloxy)methylthiophene. The crude product was dissolved in DMF (150 mL) and excess potassium cyanide was added to the solution. The reaction mixture was stirred at ambient temperature for 16 hours, then poured into water, and extracted with methylene chloride. The combined extracts were dried over Na2SO4, filtered, and concentrated in vacuo to afford 2-methoxycarbonyl-3-chloro-4-cyanomethylthiophene.

Workup

  1. concentrationthe reaction mixture was concentrated

Sources & evidence

ORD record
ord-d74c642fb48e4235b79040a2381a6790
Source dataset
uspto-grants-2002_04
Patent number
US06380221B1

Reaction notes

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