Trifluoroacetic acid → HCID 22556557, compound

HRID 457170Notes

Reaction equation

HRID 457170 reaction equation
C(OC([N:8]1[CH2:13][CH2:12][CH:11]([NH:14][C:15](=[O:24])[CH2:16][C:17]2[CH:22]=[CH:21][C:20]([Cl:23])=[CH:19][CH:18]=2)[CH2:10][CH2:9]1)=O)(C)(C)C.FC(F)(F)C(O)=O>ClCCl>[Cl:23][C:20]1[CH:21]=[CH:22][C:17]([CH2:16][C:15]([NH:14][CH:11]2[CH2:12][CH2:13][NH:8][CH2:9][CH2:10]2)=[O:24])=[CH:18][CH:19]=1

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 470691701,1-Dimethylethyl 4-[[2-(4-chlorophenyl)acetyl]amino]-1-piperidinecarboxylate

Product 1

HCID 22556557HCID 22556557, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A solution of 4-[2-(4-chloro-phenyl)-acetylamino]-piperidine-1-carboxylic acid tert-butyl ester (0.55 g, 1.54 mmol) in dichloromethane (8.0 mL) cooled at 0° C. was treated with trifluoroacetic acid (20%) and warmed to room temperature and stirred for 2 h. The reaction mixture was concentrated in vacuo, diluted with ethyl acetate and free based with 10% aqueous sodium bicarbonate. The combined organic layers were dried over sodium sulfate and concentrated in vacuo. The crude product was purified on silica using gradient elution from ethyl acetate/methanol (2%) to ethyl acetate/methanol (20%). 1H-NMR (CDCL3) δ: 1.15–1.25 (2H, m), 1.80–1.90 (2H, m), 2.60–2.75 (2H, m), 2.90–3.10 (2H, m), 3.5 (2H, s), 3.85 (1H, m), 5.20 (1H, d), 7.15–7.35 (4H, m). ESI-MS m/z: 253 (M+1), UV retention time: 0.87 min.

Workup

  1. concentrationThe reaction mixture was concentrated in vacuo
  2. additiondiluted with ethyl acetate
  3. dry with materialThe combined organic layers were dried over sodium sulfate
  4. concentrationconcentrated in vacuo
  5. customThe crude product was purified on silica using gradient elution from ethyl acetate/methanol (2%) to ethyl acetate/methanol (20%)

Sources & evidence

ORD record
ord-f4cd2ab6317d4c27924c52d4c59f04a9
Source dataset
uspto-grants-2007_03
Patent number
US07186729B2

Reaction notes

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