Acetic Anhydride → N-acetyl-N-[5-methyl-6-(4-pyrrolidin-1-yl-piperidine-1-carbonyl)-3-(3-trifluoromethyl-phenyl)-pyridin-2-yl]-acetamide

HRID 1517079Notes

Reaction equation

HRID 1517079 reaction equation
[NH2:1][C:2]1[N:7]=[C:6]([C:8]([N:10]2[CH2:15][CH2:14][CH:13]([N:16]3[CH2:20][CH2:19][CH2:18][CH2:17]3)[CH2:12][CH2:11]2)=[O:9])[C:5]([CH3:21])=[CH:4][C:3]=1[C:22]1[CH:27]=[CH:26][CH:25]=[C:24]([C:28]([F:31])([F:30])[F:29])[CH:23]=1.CCN([CH2:37][CH3:38])CC.[C:39](OC(=O)C)(=[O:41])[CH3:40].C(=O)([O-])[O-:47].[Na+].[Na+]>CC(C)=O>[CH3:21][C:5]1[CH:4]=[C:3]([C:22]2[CH:27]=[CH:26][CH:25]=[C:24]([C:28]([F:31])([F:30])[F:29])[CH:23]=2)[C:2]([NH:1][C:39](=[O:41])[CH3:40])=[N:7][C:6]=1[C:8]([N:10]1[CH2:15][CH2:14][CH:13]([N:16]2[CH2:17][CH2:18][CH2:19][CH2:20]2)[CH2:12][CH2:11]1)=[O:9].[C:39]([N:1]([C:2]1[C:3]([C:22]2[CH:27]=[CH:26][CH:25]=[C:24]([C:28]([F:31])([F:30])[F:29])[CH:23]=2)=[CH:4][C:5]([CH3:21])=[C:6]([C:8]([N:10]2[CH2:15][CH2:14][CH:13]([N:16]3[CH2:17][CH2:18][CH2:19][CH2:20]3)[CH2:12][CH2:11]2)=[O:9])[N:7]=1)[C:37](=[O:47])[CH3:38])(=[O:41])[CH3:40]

Participants

7

Reactant 4

HCID 7918Acetic AnhydrideHCID 8471TriethylamineHCID 10340Sodium CarbonateHCID 44547360[6-Amino-3-methyl-5-(3-trifluoromethyl-phenyl)-pyridin-2-yl]-(4-pyrrolidin-1-yl-piperidin-1-yl)-methanone

Product 2

HCID 57441146N-[5-methyl-6-(4-pyrrolidin-1-yl-piperidine-1-carbonyl)-3-(3-trifluoromethyl-phenyl)-pyridin-2-yl]-acetamideHCID 58016733N-acetyl-N-[5-methyl-6-(4-pyrrolidin-1-yl-piperidine-1-carbonyl)-3-(3-trifluoromethyl-phenyl)-pyridin-2-yl]-acetamideYield 37%

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

A solution of 0.22 g (0.5 mmol) of [6-amino-3-methyl-5-(3-trifluoromethyl-phenyl)-pyridin-2-yl]-(4-pyrrolidin-1-yl-piperidin-1-yl)-methanone (example 7) in 5 ml of acetone was treated with 0.35 ml=0.26 g (2.5 mmol) of Et3N, followed by 0.19 ml=0.21 g (2.0 mmol) of acetic anhydride and the reaction mixture was subsequently heated up to reflux. After 22 hours, it was poured into crashed ice, the pH was adjusted to 8-9 with sodium carbonate solution and it was extracted twice with EtOAc; the organic phases were washed with water, dried over magnesium sulfate, filtered and evaporated. The residue was purified by flash column chromatography (CH2Cl2/MeOH 1:0 to 3:2) to give 0.12 g (51%) the N-[5-methyl-6-(4-pyrrolidin-1-yl-piperidine-1-carbonyl)-3-(3-trifluoromethyl-phenyl)-pyridin-2-yl]-acetamide as light yellow solid [MS: 475.2 (MH+)] and 0.098 g (37%) of N-acetyl-N-[5-methyl-6-(4-pyrrolidin-1-yl-piperidine-1-carbonyl)-3-(3-trifluoromethyl-phenyl)-pyridin-2-yl]-acetamide as yellow solid. MS: 517.2 (MH+).

Workup

  1. temperaturethe reaction mixture was subsequently heated up
  2. temperatureto reflux
  3. additionit was poured
  4. extractionwas extracted twice with EtOAc
  5. washthe organic phases were washed with water
  6. dry with materialdried over magnesium sulfate
  7. filtrationfiltered
  8. customevaporated
  9. customThe residue was purified by flash column chromatography (CH2Cl2/MeOH 1:0 to 3:2)

Sources & evidence

ORD record
ord-f81965d9ded34299a3923957732c3859
Source dataset
uspto-grants-2012_07
Patent number
US08227613B2

Reaction notes

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