p-Toluenesulfonic acid → N-(2,6-difluorophenyl)-2-(ethyloxy)-5-(3-{2-[(2-(ethyloxy)-5-methyl-4-{4-[2-(methylsulfonyl)ethyl]-1-piperazinyl}phenyl)amino]-4-pyrimidinyl}imidazo[1,2-a]pyridin-2-yl)benzamide

HRID 419668Notes

Reaction equation

HRID 419668 reaction equation
Cl[C:2]1[N:7]=[C:6]([C:8]2[N:12]3[CH:13]=[CH:14][CH:15]=[CH:16][C:11]3=[N:10][C:9]=2[C:17]2[CH:18]=[CH:19][C:20]([O:34][CH2:35][CH3:36])=[C:21]([CH:33]=2)[C:22]([NH:24][C:25]2[C:30]([F:31])=[CH:29][CH:28]=[CH:27][C:26]=2[F:32])=[O:23])[CH:5]=[CH:4][N:3]=1.[CH3:37][C:38]1[C:39]([N:48]2[CH2:53][CH2:52][N:51]([CH2:54][CH2:55][S:56]([CH3:59])(=[O:58])=[O:57])[CH2:50][CH2:49]2)=[CH:40][C:41]([O:45][CH2:46][CH3:47])=[C:42]([NH2:44])[CH:43]=1.C1(C)C=CC(S(O)(=O)=O)=CC=1.C[O-].[Na+]>C(O)C(F)(F)F.CO>[F:32][C:26]1[CH:27]=[CH:28][CH:29]=[C:30]([F:31])[C:25]=1[NH:24][C:22](=[O:23])[C:21]1[CH:33]=[C:17]([C:9]2[N:10]=[C:11]3[CH:16]=[CH:15][CH:14]=[CH:13][N:12]3[C:8]=2[C:6]2[CH:5]=[CH:4][N:3]=[C:2]([NH:44][C:42]3[CH:43]=[C:38]([CH3:37])[C:39]([N:48]4[CH2:53][CH2:52][N:51]([CH2:54][CH2:55][S:56]([CH3:59])(=[O:58])=[O:57])[CH2:50][CH2:49]4)=[CH:40][C:41]=3[O:45][CH2:46][CH3:47])[N:7]=2)[CH:18]=[CH:19][C:20]=1[O:34][CH2:35][CH3:36]

Participants

7

Reactant 4

HCID 6101p-Toluenesulfonic acidHCID 10942334Sodium MethoxideHCID 594527225-Methyl-2-(ethyloxy)-4-{4-[2-(methylsulfonyl)ethyl]-1-piperazinyl}anilineHCID 594529415-[3-(2-chloro-4-pyrimidinyl)imidazo[1,2-a]pyridin-2-yl]-N-(2,6-difluorophenyl)-2-(ethyloxy)benzamide

Product 1

HCID 59452648N-(2,6-difluorophenyl)-2-(ethyloxy)-5-(3-{2-[(2-(ethyloxy)-5-methyl-4-{4-[2-(methylsulfonyl)ethyl]-1-piperazinyl}phenyl)amino]-4-pyrimidinyl}imidazo[1,2-a]pyridin-2-yl)benzamideYield 54.4%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 64092,2,2-TrifluoroethanolSolvent

Conditions

Temperature
80 °C

Procedure

To 5-[3-(2-chloro-4-pyrimidinyl)imidazo[1,2-a]pyridin-2-yl]-N-(2,6-difluorophenyl)-2-(ethyloxy)benzamide (Intermediate Example 6) (2.9 g, 5.7 mmol) and (5-methyl-2-(ethyloxy)-4-{4-[2-(methylsulfonyl)ethyl]-1-piperazinyl}phenyl)amine (2.0 g, 5.7 mmol) in trifluoroethanol (100 mL) was added p-toluene sulfonic acid (2.2 g, 11 mmol), and the vial was sealed and heated to 80° C. overnight. The reaction was then cooled to rt and excess 0.5 M NaOMe in MeOH was added. The solution was transferred to a roundbottom flask and silica was added. The solvent was removed on a rotovap and the product purified on a 120 g ISCO column. Desired fractions were combined and rotovaped down. The resulting foam was dissolved in DCM and ether was added to provide the title compound 2.5 g, 3.1 mmol, 54% yield) as a yellow solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 9.71 (s, 1H), 9.33 (d, J=6.7 Hz, 1H), 8.32 (s, 1H), 8.23 (d, J=5.4 Hz, 1H), 8.02 (s, 1H), 7.73-7.70 (m, 1H), 7.67 (d, J=9.0 Hz, 1H), 7.53 (s, 1H), 7.43-7.31 (m, 2H), 7.23 (d, J=8.6 Hz, 1H), 7.16 (t, J=8.0 Hz, 2H), 6.92 (t, J=6.6 Hz, 1H), 6.71 (s, 1H), 6.56 (d, J=5.1 Hz, 1H), 4.23 (q, J=7.2 Hz, 2H), 4.04 (q, J=7.0 Hz, 2H), 3.33-3.25 (m, 2H), 3.03 (s, 3H), 2.84-2.78 (m, 4H), 2.74 (t, J=6.6 Hz, 2H), 2.63-2.46 (m, 4H), 2.11 (s, 3H), 1.40 (t, J=6.8 Hz, 3H), 1.23 (t, J=7.0 Hz, 3H). MS (ESI) m/z=811 [M+H]+.

Workup

  1. customthe vial was sealed
  2. temperatureThe reaction was then cooled to rt
  3. customThe solution was transferred to a roundbottom flask
  4. additionsilica was added
  5. customThe solvent was removed on a rotovap
  6. customthe product purified on a 120 g ISCO column
  7. dissolutionThe resulting foam was dissolved in DCM
  8. additionether was added

Sources & evidence

ORD record
ord-90b0d9cdd12543edb35bd83c366cf099
Source dataset
uspto-grants-2012_01
Patent number
US08093239B2

Reaction notes

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