Triethylamine → tert-butyl N'-[4-chloro-2-(3,4,5-trifluorophenyl)butyryl]hydrazinecarboxylate

HRID 2235757Notes

Reaction equation

HRID 2235757 reaction equation
[Cl:1][CH2:2][CH2:3][CH:4]([C:8]1[CH:13]=[C:12]([F:14])[C:11]([F:15])=[C:10]([F:16])[CH:9]=1)[C:5](Cl)=[O:6].[C:17]([O:21][C:22]([CH3:25])([CH3:24])[CH3:23])(=[O:20])[NH:18][NH2:19].C(N(CC)CC)C.C(=O)(O)[O-].[Na+]>C1COCC1>[Cl:1][CH2:2][CH2:3][CH:4]([C:8]1[CH:13]=[C:12]([F:14])[C:11]([F:15])=[C:10]([F:16])[CH:9]=1)[C:5]([NH:19][NH:18][C:17]([O:21][C:22]([CH3:25])([CH3:24])[CH3:23])=[O:20])=[O:6]

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 70091tert-Butyl carbazateHCID 516892Sodium BicarbonateHCID 866151464-Chloro-2-(3,4,5-trifluorophenyl)butyryl chloride

Product 1

HCID 66839725tert-butyl N'-[4-chloro-2-(3,4,5-trifluorophenyl)butyryl]hydrazinecarboxylate

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

oxalyl chloride (0.63 mL) and DMF (1 drop) were added to a solution of 4-chloro-2-(3,4,5-trifluorophenyl)butyric acid (1.17 g) in methylene chloride (30 mL) at 0° C., and the reaction solution was stirred at room temperature for one hour. The reaction solution was concentrated under reduced pressure to obtain 4-chloro-2-(3,4,5-trifluorophenyl)butyryl chloride. A solution of 4-chloro-2-(3,4,5-trifluorophenyl)butyryl chloride in THF (5 mL) was added to a solution of tert-butyl carbazate (600 mg) and triethylamine (3.1 mL) in THF (20 mL) at 0° C., and the reaction solution was stirred at room temperature for one hour. The reaction solution was added to a saturated sodium bicarbonate solution, followed by extraction with ethyl acetate. The resulting extract was dried over magnesium sulfate and then concentrated under reduced pressure. The residue was purified by silica gel column chromatography (elution solvent: heptane-ethyl acetate system) to obtain 1.35 g of the title compound. The property value of the compound is as follows.

Workup

  1. extractionfollowed by extraction with ethyl acetate
  2. extractionThe resulting extract
  3. dry with materialwas dried over magnesium sulfate
  4. concentrationconcentrated under reduced pressure
  5. customThe residue was purified by silica gel column chromatography (elution solvent: heptane-ethyl acetate system)

Sources & evidence

ORD record
ord-1f95cf8fd3f749bbb4f5f686d16cea04
Source dataset
uspto-grants-2010_05
Patent number
US07713993B2

Reaction notes

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