1,2-Dichloroethane → HCID 178473388, compound

HRID 1908641Notes

Reaction equation

HRID 1908641 reaction equation
[C:1]1([N:7]2[C:11](=[O:12])[CH:10]=[C:9]([C:13]([OH:15])=O)[NH:8]2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[CH2:16]([O:18][C:19]([N:21]1[CH2:26][CH2:25][N:24]([C:27](=[O:39])[C@@H:28]([NH2:38])[CH2:29][CH2:30][C:31]([O:33][C:34]([CH3:37])([CH3:36])[CH3:35])=[O:32])[CH2:23][CH2:22]1)=[O:20])[CH3:17].C(Cl)CCl>CN(C=O)C.C(OCC)(=O)C>[CH2:16]([O:18][C:19]([N:21]1[CH2:22][CH2:23][N:24]([C:27](=[O:39])[C@@H:28]([NH:38][C:13]([C:9]2[CH:10]=[C:11]([OH:12])[N:7]([C:1]3[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=3)[N:8]=2)=[O:15])[CH2:29][CH2:30][C:31]([O:33][C:34]([CH3:36])([CH3:35])[CH3:37])=[O:32])[CH2:25][CH2:26]1)=[O:20])[CH3:17]

Participants

6

Reactant 3

HCID 111,2-DichloroethaneHCID 91673915-oxo-1-phenyl-2,5-dihydro-1H-pyrazole-3-carboxylic acidHCID 66651766ethyl 4-[(2S)-2-amino-5-tert-butoxy-5-oxopentanoyl]piperazine-1-carboxylate

Product 1

HCID 178473388HCID 178473388, compound

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of 7.2 g 1-phenyl-3-carboxy-5-pyrazolone and 12.1 g 4-((S)-2-amino-4-tert-butoxycarbonyl-butyryl)-piperazine-1-carboxylic acid ethyl ester (prepared as described earlier) in 100 ml DMF 5.4 g HOBT and 6.7 g EDC were added and the reaction mixture was stirred for 12 h at RT. Then the reaction mixture was diluted with ethyl acetate and subsequently extracted with aqueous LiCl (4% w/w), 0.1 M HCl and aqueous NaHCO3. The organic layer was dried over MgSO4 and the solvent was removed under reduced pressure. The crude product thus obtained was used in the subsequent reaction.

Workup

  1. extractionsubsequently extracted with aqueous LiCl (4% w/w), 0.1 M HCl and aqueous NaHCO3
  2. dry with materialThe organic layer was dried over MgSO4
  3. customthe solvent was removed under reduced pressure

Sources & evidence

ORD record
ord-1ebfa03ddefc4ec6857baeb95504b997
Source dataset
uspto-grants-2013_12
Patent number
US08598179B2

Reaction notes

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