Triethylamine → 1-(1-{4-[(2-Phenyl-5-trifluoromethyl-oxazole-4-carbonyl)-amino]-phenyl}-piperidine-4-carbonyl)-piperidine-4-carboxylic acid ethyl ester

HRID 1691944Notes

Reaction equation

HRID 1691944 reaction equation
[C:1]1([C:7]2[O:8][C:9]([C:30]([F:33])([F:32])[F:31])=[C:10]([C:12]([NH:14][C:15]3[CH:20]=[CH:19][C:18]([N:21]4[CH2:26][CH2:25][CH:24]([C:27](O)=[O:28])[CH2:23][CH2:22]4)=[CH:17][CH:16]=3)=[O:13])[N:11]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[CH2:34]([O:36][C:37]([CH:39]1[CH2:44][CH2:43][NH:42][CH2:41][CH2:40]1)=[O:38])[CH3:35].C1CN([P+](Br)(N2CCCC2)N2CCCC2)CC1.F[P-](F)(F)(F)(F)F.C(N(CC)CC)C>CN(C=O)C>[CH2:34]([O:36][C:37]([CH:39]1[CH2:44][CH2:43][N:42]([C:27]([CH:24]2[CH2:25][CH2:26][N:21]([C:18]3[CH:17]=[CH:16][C:15]([NH:14][C:12]([C:10]4[N:11]=[C:7]([C:1]5[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=5)[O:8][C:9]=4[C:30]([F:32])([F:31])[F:33])=[O:13])=[CH:20][CH:19]=3)[CH2:22][CH2:23]2)=[O:28])[CH2:41][CH2:40]1)=[O:38])[CH3:35]

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 70770Ethyl 4-piperidinecarboxylateHCID 2733179PyBroPHCID 576521231-{4-[(2-Phenyl-5-trifluoromethyl-oxazole-4-carbonyl)-amino]-phenyl}-piperidine-4-carboxylic acid

Product 1

HCID 251200681-(1-{4-[(2-Phenyl-5-trifluoromethyl-oxazole-4-carbonyl)-amino]-phenyl}-piperidine-4-carbonyl)-piperidine-4-carboxylic acid ethyl ester

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of 1-{4-[(2-phenyl-5-trifluoromethyl-oxazole-4-carbonyl)-amino]-phenyl}-piperidine-4-carboxylic acid (229.5 mg, 0.5 mmol) in DMF (4 mL) was added piperidine-4-carboxylic acid ethyl ester (79 mg, 0.5 mmol), PyBrop (233.1 mg, 0.5 mmol) and triethylamine (0.1 mL). The mixture was stirred overnight and solvents were evaporated. The residue was extracted with ethyl acetate and water. After the evaporation of solvents, the residue was purified through flash column chromatography using ethyl acetate and hexanes. The desired fraction was evaporated and triturated with ether and petroleum ether (2:1) to give a yellow solid as 1-(1-{4-[(2-phenyl-5-trifluoromethyl-oxazole-4-carbonyl)-amino]-phenyl}-piperidine-4-carbonyl)-piperidine-4-carboxylic acid ethyl ester. LC-MS showed a single peak with a retention time of 3.54 min. LRMS calcd for C31H33F3N4O5 (M+H) 599.24, obsd 599.3

Workup

  1. customsolvents were evaporated
  2. extractionThe residue was extracted with ethyl acetate and water
  3. customAfter the evaporation of solvents
  4. customthe residue was purified through flash column chromatography
  5. customThe desired fraction was evaporated
  6. customtriturated with ether and petroleum ether (2:1)

Sources & evidence

ORD record
ord-0843b60479d64c8a81bc665350a16cb7
Source dataset
uspto-grants-2012_04
Patent number
US08153644B2

Reaction notes

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