Propargyl bromide → Propargyl 2-chloro-4-trifluoromethyl-5-thiazolecarboxylate

HRID 1903681Notes

Reaction equation

HRID 1903681 reaction equation
[Cl:1][C:2]1[S:3][C:4]([C:11]([OH:13])=[O:12])=[C:5]([C:7]([F:10])([F:9])[F:8])[N:6]=1.[CH2:14](Br)[C:15]#[CH:16].C(NC(C)C)(C)C>C(Cl)Cl>[Cl:1][C:2]1[S:3][C:4]([C:11]([O:13][CH2:16][C:15]#[CH:14])=[O:12])=[C:5]([C:7]([F:8])([F:10])[F:9])[N:6]=1

Participants

5

Reactant 3

HCID 7842Propargyl bromideHCID 7912DiisopropylamineHCID 132827432-Chloro-4-(trifluoromethyl)-1,3-thiazole-5-carboxylic acid

Product 1

HCID 13670344Propargyl 2-chloro-4-trifluoromethyl-5-thiazolecarboxylate

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A mixture of 4.63 g (0.02 mole) of 2-chloro-4-trifluoromethyl-5-thiazolecarboxylic acid, 2.42 g (0.02 mole) of propargyl bromide, 2.59 g (0.02 mole) of diisopropylamine, and 50 ml. of methylene chloride was stirred for 16 hours. The methylene chloride solution was washed successively with diluted hydrochloric acid and saturated sodium bicarbonate, dried (MgSO4) and concentrated under reduced pressure. The residue was Kugelrohr distilled to give propargyl 2-chloro-4-trifluoromethyl-5-thiazolecarboxylate as a colorless liquid.

Workup

  1. washThe methylene chloride solution was washed successively with diluted hydrochloric acid and saturated sodium bicarbonate
  2. dry with materialdried (MgSO4)
  3. concentrationconcentrated under reduced pressure
  4. distillationdistilled

Sources & evidence

ORD record
ord-e080420f98a44d219a38df5b6962ff45
Source dataset
uspto-grants-1984_03
Patent number
US04437876

Reaction notes

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