N-Ethyl cyclohexylamine → N-ethyl-N-cyclohexyl-4-[1-(2-methoxycyclohexyl)-1,2,3,4-tetrazol-5-yl]thio-butyramide

HRID 1719585Notes

Reaction equation

HRID 1719585 reaction equation
[CH3:1][O:2][CH:3]1[CH2:8][CH2:7][CH2:6][CH2:5][CH:4]1[N:9]1[C:13]([CH2:14][CH2:15][CH2:16][C:17](O)=[S:18])=[N:12][N:11]=[N:10]1.[CH2:20]1[CH2:30][CH2:29][N:28]2[C:23](=NC[CH2:26][CH2:27]2)[CH2:22][CH2:21]1.ClC(OCC(C)C)=O.C(NC1CCCCC1)C>O1CCCC1>[CH2:27]([N:28]([CH:23]1[CH2:22][CH2:21][CH2:20][CH2:30][CH2:29]1)[C:17](=[S:18])[CH2:16][CH2:15][CH2:14][C:13]1[N:9]([CH:4]2[CH2:5][CH2:6][CH2:7][CH2:8][CH:3]2[O:2][CH3:1])[N:10]=[N:11][N:12]=1)[CH3:26]

Participants

6

Reactant 4

HCID 21609N-Ethyl cyclohexylamineHCID 62365Isobutyl chloroformateHCID 811841,8-Diazabicyclo(5.4.0)undec-7-eneHCID 178489576HCID 178489576, compound

Product 1

HCID 21295432N-ethyl-N-cyclohexyl-4-[1-(2-methoxycyclohexyl)-1,2,3,4-tetrazol-5-yl]thio-butyramideYield 45%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

4-[1-(2-Methoxycyclohexyl)-1,2,3,4-tetrazol-5-yl]thio-butyric acid (45 mmole) is dissolved in tetrahydrofuran (50 ml), and thereto is added DBU (50 mmole). To the mixture is added dropwise with stirring isobutyl chloroformate (50 mmole) under ice-cooling, and the mixture is stirred at room temperature for 30 minutes. To the mixture is added dropwise N-ethyl-cyclohexylamine (54 mmole), and the mixture is further stirred at room temperature for 2 hours. The solvent is distilled off under reduced pressure, and the residue is extracted with chloroform. The chloroform layer is washed with 5% aqueous hydrochloric acid, an aqueous saturated sodium hydrogen carbonate solution and an aqueous saturated sodium chloride solution and then dried over anhydrous sodium sulfate. After distilling off chloroform, the resulting residue is subjected to column chromatography (Wakogel C-200, eluting solvent, benzene:chloroform=4:1, V/V) to isolate N-ethyl-N-cyclohexyl-4-[1-(2-methoxycyclohexyl)-1,2,3,4-tetrazol-5-yl]thio-butyramide (yield: 45%).

Workup

  1. temperaturecooling
  2. stirringthe mixture is further stirred at room temperature for 2 hours
  3. distillationThe solvent is distilled off under reduced pressure
  4. extractionthe residue is extracted with chloroform
  5. washThe chloroform layer is washed with 5% aqueous hydrochloric acid
  6. dry with materialan aqueous saturated sodium hydrogen carbonate solution and an aqueous saturated sodium chloride solution and then dried over anhydrous sodium sulfate
  7. distillationAfter distilling off chloroform
  8. washthe resulting residue is subjected to column chromatography (Wakogel C-200, eluting solvent, benzene:chloroform=4:1, V/V)

Sources & evidence

ORD record
ord-be63faf05751482f90281b0c4962dbfb
Source dataset
uspto-grants-1985_09
Patent number
US04540703

Reaction notes

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