Methylhydrazine → Ethyl 2-(methylhydrazono)propanoate

HRID 15955

Reaction equation

HRID 15955 reaction equation
[C:1]([O:6][CH2:7][CH3:8])(=[O:5])[C:2]([CH3:4])=O.[O-]S([O-])(=O)=O.[Mg+2].[CH3:15][NH:16][NH2:17]>C(Cl)(Cl)Cl>[CH3:15][NH:16][N:17]=[C:2]([CH3:4])[C:1]([O:6][CH2:7][CH3:8])=[O:5]

Participants

5

Reactant 3

HCID 6061MethylhydrazineHCID 12041Ethyl pyruvateHCID 24083Sulfuric acid magnesium salt (1:1)

Product 1

HCID 73828661Ethyl 2-(methylhydrazono)propanoateYield 94%

Reagents, catalysts & solvents 1

HCID 6212ChloroformSolvent2×

Procedure

To a suspension of ethyl pyruvate (37.8 mL, 338 mmol) and MgSO4 (40.8 g, 339 mmol) in CHCl3 (500 mL) was added a solution of methylhydrazine (18.0 mL, 332 mmol) in CHCl3 (100 mL) at 0° C. The reaction mixture was warmed to room temperature. After stirring for 24 hours at room temperature, the reaction mixture was filtered. The filtrate was concentrated under reduced pressure to give 44 g (94%) of the desired product that was used directly without further purification.

Workup

  1. filtrationthe reaction mixture was filtered
  2. concentrationThe filtrate was concentrated under reduced pressure

Sources & evidence

ORD record
ord-5f3420f9dbf54f8ba647f6529ca0f879
Source dataset
uspto-grants-2010_06
Patent number
US07732616B2

Linked notes

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