2-(Tri-n-butylstannyl)oxazole → 2-methyl-1-{[2-methyl-3-(trifluoromethyl)phenyl]methyl}-6-(4-morpholinyl)-4-(1,3-oxazol-2-yl)-1H-benzimidazole

HRID 539221Notes

Reaction equation

HRID 539221 reaction equation
Br[C:2]1[C:10]2[N:9]=[C:8]([CH3:11])[N:7]([CH2:12][C:13]3[CH:18]=[CH:17][CH:16]=[C:15]([C:19]([F:22])([F:21])[F:20])[C:14]=3[CH3:23])[C:6]=2[CH:5]=[C:4]([N:24]2[CH2:29][CH2:28][O:27][CH2:26][CH2:25]2)[CH:3]=1.C([Sn](CCCC)(CCCC)[C:35]1[O:36][CH:37]=[CH:38][N:39]=1)CCC>O1CCCC1.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[CH3:11][C:8]1[N:7]([CH2:12][C:13]2[CH:18]=[CH:17][CH:16]=[C:15]([C:19]([F:22])([F:20])[F:21])[C:14]=2[CH3:23])[C:6]2[CH:5]=[C:4]([N:24]3[CH2:29][CH2:28][O:27][CH2:26][CH2:25]3)[CH:3]=[C:2]([C:35]3[O:36][CH:37]=[CH:38][N:39]=3)[C:10]=2[N:9]=1

Participants

5

Reactant 2

HCID 154861832-(Tri-n-butylstannyl)oxazoleHCID 569605424-(7-bromo-2-methyl-3-(2-methyl-3-(trifluoromethyl)benzyl)-3H-benzo[d]imidazol-5-yl)morpholine

Product 1

HCID 569605432-methyl-1-{[2-methyl-3-(trifluoromethyl)phenyl]methyl}-6-(4-morpholinyl)-4-(1,3-oxazol-2-yl)-1H-benzimidazole

Reagents, catalysts & solvents 2

HCID 178418476HCID 178418476, compoundCatalystHCID 8028TetrahydrofuranSolvent

Procedure

A mixture of 4-bromo-2-methyl-1-{[2-methyl-3-(trifluoromethyl)phenyl]methyl}-6-(4-morpholinyl)-1H-benzimidazole (150 mg, 0.320 mmol), prepared as described in Example 63, 2-(tributylstannanyl)-1,3-oxazole (195 mg, 0.545 mmol) and Pd(Ph3P)2Cl2 (11.27 mg, 0.016 mmol) in Tetrahydrofuran (THF) (5 mL) was stirred at reflux temperature for 19 h. Conversion to the desired product is observed by LC/MS analysis, but the majority of the mixture is still SM. The reaction mixture was transferred in a microwavable vial and irradiated in a microwave reactor at 120° C. for 90 min. The reaction mixture was diluted with EtOAc and CHCl3, washed with aq sat sol NH4Cl, brine, dried over Na2SO4 and the solvent was evaporated under reduced pressure. The residue was purified on a silica gel column (ISCO, 0-70% EtOAc in Hexanes—no product peak observed—then 0-10% MeOH in CH2Cl2) to give desired product (94.8 mg, 0.204 mmol, 63.5% yield) as a yellow powder. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 7.87 (s, 1H), 7.71 (d, J=2.27 Hz, 1H), 7.58 (d, J=7.83 Hz, 1H), 7.37 (s, 1H), 7.11 (t, J=7.83 Hz, 1H), 6.66 (d, J=2.27 Hz, 1H), 6.47 (d, J=7.83 Hz, 1H), 5.31 (s, 2H), 3.81-3.92 (m, 4H), 3.11-3.24 (m, 4H), 2.58 (s, 3H), 2.56 (s, 3H). MS (ES+) m/e 457.1 [M+H]+

Workup

  1. customprepared
  2. temperatureat reflux temperature for 19 h

Sources & evidence

ORD record
ord-58803239ea934d48b286f1a1468fb333
Source dataset
uspto-grants-2014_10
Patent number
US08865912B2

Reaction notes

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