Trifluoroacetic acid → HCID 22556557, compound

HRID 242646Notes

Reaction equation

HRID 242646 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-30875f5c61294a36992f096164e20906
Source dataset
uspto-grants-2014_02
Patent number
US08653096B2

Reaction notes

Loading…