Pentylhydrazine → 1H-Pyrazole-4-carbonitrile, 5-amino-1-pentyl-

HRID 236670Notes

Reaction equation

HRID 236670 reaction equation
C(O[CH:4]=[C:5]([C:8]#[N:9])[C:6]#[N:7])C.[CH2:10]([NH:15][NH2:16])[CH2:11][CH2:12][CH2:13][CH3:14]>C(O)C>[NH2:9][C:8]1[N:15]([CH2:10][CH2:11][CH2:12][CH2:13][CH3:14])[N:16]=[CH:4][C:5]=1[C:6]#[N:7]

Participants

4

Reactant 2

HCID 14247PentylhydrazineHCID 671522-(Ethoxymethylene)propanedinitrile

Product 1

HCID 109210821H-Pyrazole-4-carbonitrile, 5-amino-1-pentyl-Yield 88%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent2×

Procedure

A warm solution of 6.02 g (49.3 mM) ethoxymethylenemalononitrile in 20 ml of ethanol was added via a cannula to a stirred solution of 6.04 g (59.1 mM)n- pentylhydrazine in 20 ml of ethanol at 50° C. The reaction mixture was then heated to reflux for 30 minutes, then cooled in a refrigerator for 18 hours. The off-white crystalline precipitate was filtered to yield 7.73 g (88%) of the title compound, mp=143°-144° C.; tlc, Rf =0.5, silica gel, methanol:chloroform (1:19).

Workup

  1. temperatureThe reaction mixture was then heated
  2. temperatureto reflux for 30 minutes
  3. temperaturecooled in a refrigerator for 18 hours
  4. filtrationThe off-white crystalline precipitate was filtered

Sources & evidence

ORD record
ord-2dea189ba1b34f9d835ff3b18bd367b6
Source dataset
uspto-grants-1987_02
Patent number
US04645838

Reaction notes

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