1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → HCID 178522231, compound

HRID 132037Notes

Reaction equation

HRID 132037 reaction equation
[N+:1]([C:4]1[C:5]([C:9]([OH:11])=O)=[N:6][NH:7][CH:8]=1)([O-:3])=[O:2].[NH2:12][C@H:13]1[CH2:18][CH2:17][C@H:16]([OH:19])[CH2:15][CH2:14]1.CCN=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1>CN(C=O)C.C(Cl)Cl>[OH:19][CH:16]1[CH2:17][CH2:18][CH:13]([NH:12][C:9]([C:5]2[C:4]([N+:1]([O-:3])=[O:2])=[CH:8][NH:7][N:6]=2)=[O:11])[CH2:14][CH2:15]1

Participants

7

Reactant 4

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 178511715HCID 178511715, compoundHCID 178524956HCID 178524956, compound

Product 1

HCID 178522231HCID 178522231, compoundYield 24.2%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Procedure

A mixture of 4-nitro-3-pyrazolecarboxylic acid (4.98 g, 31.7 mmol), trans 4-aminocyclohexanol (3.65 g, 31.7 mmol), EDAC (6.68 g, 34.8 mmol) and HOBt (4.7 g, 34.8 mmol) in DMF (120 ml) was stirred at ambient temperature for 16 hours. The mixture was reduced in vacuo, the residue taken up in CH2Cl2 and washed successively with 5% citric acid, saturated aqueous sodium bicarbonate, water and brine. The product was found to be mainly in the citric acid wash, which was basified and extracted with EtOAc. The organic layer was dried over MgSO4, filtered and evaporated to give a white solid, which was triturated with CHCl3 to give 1.95 g of 4-nitro-1H-pyrazole-3-carboxylic acid 4-hydroxy-cyclohexylamide. (LC/MS: Rt 1.62, [M+H]+255).

Workup

  1. washwashed successively with 5% citric acid, saturated aqueous sodium bicarbonate, water and brine
  2. washwash
  3. extractionextracted with EtOAc
  4. dry with materialThe organic layer was dried over MgSO4
  5. filtrationfiltered
  6. customevaporated
  7. customto give a white solid, which
  8. customwas triturated with CHCl3

Sources & evidence

ORD record
ord-2114409b590543adb894eeed43e9e00e
Source dataset
uspto-grants-2008_06
Patent number
US07385059B2

Reaction notes

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