Citric Acid → HCID 77014286, compound

HRID 874552Notes

Reaction equation

HRID 874552 reaction equation
[OH:1][N:2]1C2C=CC=CC=2N=N1.Cl.C(N=C=NCCCN(C)C)C.[CH2:23]([O:27][C:28]1[CH:33]=[CH:32][C:31]([S:34]([CH2:37][NH:38][CH2:39][CH:40]([N:44]2[CH2:49][CH2:48][N:47]([S:50]([CH3:53])(=[O:52])=[O:51])[CH2:46][CH2:45]2)[C:41](O)=[O:42])(=[O:36])=[O:35])=[CH:30][CH:29]=1)[C:24]#[C:25][CH3:26].C(O)(=O)CC(CC(O)=O)(C(O)=O)O>CN(C)C=O>[CH2:23]([O:27][C:28]1[CH:33]=[CH:32][C:31]([S:34]([CH2:37][NH:38][CH2:39][CH:40]([N:44]2[CH2:45][CH2:46][N:47]([S:50]([CH3:53])(=[O:51])=[O:52])[CH2:48][CH2:49]2)[C:41]([NH:2][OH:1])=[O:42])(=[O:36])=[O:35])=[CH:30][CH:29]=1)[C:24]#[C:25][CH3:26]

Participants

6

Reactant 4

HCID 311Citric AcidHCID 757711-HydroxybenzotriazoleHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 71115303HCID 71115303, compound

Product 1

HCID 77014286HCID 77014286, compoundYield 51.2%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

63 mg (0.5 mmol) of 1-hydroxybenzotriazole and then 88 mg (0.5 mmol) of 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride are added to a solution of 200 mg (0.4 mmol) of 3-[(4-but-2-ynyloxybenzenesulfonyl)methylamino]-2-(4-methanesulfonylpiperazin-1-yl)propanoic acid in 6 ml of dimethylformamide. The reaction medium is stirred for 10 min at ambient temperature and then 68 mg (0.5 mmol) of O-tert-butyldimethysilylhydroxylamine are added. The reaction medium is then stirred at ambient temperature for 24 h, hydrolyzed by adding 2 ml of a 5% aqueous citric acid solution, and stirred for a further 30 minutes. After extraction with ethyl acetate, the organic phase is washed with water, dried over magnesium sulfate, filtered and concentrated. The crude residue is purified by chromatography on silica gel, elution being carried out with a 95/5 dichloromethane/methanol mixture. 100 mg (50%) of 3-[(4-but-2-ynyloxybenzenesulfonyl) methylamino]-N-hydroxy-2-(4-methanesulfonylpiperazin-1-yl)propionamide are obtained in the form of a white solid with a melting point of 86° C.

Workup

  1. stirringThe reaction medium is then stirred at ambient temperature for 24 h
  2. stirringstirred for a further 30 minutes
  3. extractionAfter extraction with ethyl acetate
  4. washthe organic phase is washed with water
  5. dry with materialdried over magnesium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customThe crude residue is purified by chromatography on silica gel, elution

Sources & evidence

ORD record
ord-65540e80af924fb6a4fe9bbb7d7a6995
Source dataset
uspto-grants-2015_03
Patent number
US08980897B2

Reaction notes

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