Triethylamine → HCID 66738262, compound

HRID 1641808Notes

Reaction equation

HRID 1641808 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[CH:19]=[CH:18][C:17]([NH2:20])=[CH:16][C:15]=2[C:21]#[N:22])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[C:23]1([C:29]2[O:30][C:31]([C:37]([F:40])([F:39])[F:38])=[C:32]([C:34](O)=[O:35])[N:33]=2)[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1.C(N(CC)CC)C.Cl.CN(C)CCCN=C=NCC>C(Cl)Cl>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[CH:19]=[CH:18][C:17]([NH:20][C:34]([C:32]3[N:33]=[C:29]([C:23]4[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=4)[O:30][C:31]=3[C:37]([F:39])([F:40])[F:38])=[O:35])=[CH:16][C:15]=2[C:21]#[N:22])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride2×HCID 27764382-Phenyl-5-(trifluoromethyl)-oxazole-4-carboxylic acidHCID 22227872tert-Butyl 4-(4-amino-2-cyanophenyl)piperazine-1-carboxylate

Product 1

HCID 66738262HCID 66738262, compoundYield 25%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

Crude 4-(4-amino-2-cyano-phenyl)-piperazine-1-carboxylic acid tert-butyl ester from above was dissolved in methylene chloride (10 mL) and to the resulting solution was added 2-phenyl-5-trifluoromethyl-oxazole-4-carboxylic acid (454 mg), triethylamine (247 μL) and 1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride (EDCI, 337 mg). The reaction mixture was stirred at room temperature for 3 hr. Another portion of 1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride (0.5 eq) was added. The reaction mixture was stirred at 50° C. for 3 hr and at room temperature for 3.5 days. The reaction mixture was partitioned between ethyl acetate and water. The organic layer was dried over sodium sulfate, filtered and evaporated. Purification by flash chromatography afforded 4-{2-cyano-4-[(2-phenyl-5-trifluoromethyl-oxazole-4-carbonyl)-amino]-phenyl}-piperazine-1-carboxylic acid tert-butyl ester (240 mg, 25% yield) as a yellow solid. LCMS calcd for C27H26F3N5O4 (m/e) 541, obsd 542 (M+H).

Workup

  1. stirringThe reaction mixture was stirred at 50° C. for 3 hr and at room temperature for 3.5 days
  2. customThe reaction mixture was partitioned between ethyl acetate and water
  3. dry with materialThe organic layer was dried over sodium sulfate
  4. filtrationfiltered
  5. customevaporated
  6. customPurification by flash chromatography

Sources & evidence

ORD record
ord-1249d16193bb4aacbb10b65ab2ebb935
Source dataset
uspto-grants-2012_02
Patent number
US08115011B2

Reaction notes

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