تفاعل #72837

معادلة التفاعل

4-bromo-2-methyl-1-{[2-methyl-3-(trifluoromethyl)phenyl]methyl}-6-(4-morpholinyl)-1H-benzimidazole

Water

trimethylboroxine

potassium carbonate

water

→

desired compound

المردود 42.5%

2,4-dimethyl-1-{[2-methyl-3-(trifluoromethyl)phenyl]methyl}-6-(4-morpholinyl)-1H-benzimidazole

المردود 42.5%

المذيبات

1,4-Dioxane

ظروف التفاعل

المعالجة

1. 1
   أخرىprepared
2. 2
   أخرىwas irradiated at 120° C. in a microwave synthesizer for 40 min
3. 3
   درجة الحرارةcooled
4. 4
   استخلاصThe mixture was extracted with ethyl acetate
5. 5
   غسيلThe extracts were washed with brine
6. 6
   تجفيفdried (Na2SO4)
7. 7
   أخرىevaporated under reduced pressure
8. 8
   أخرىThe residue was purified by RP-HPLC (25-45% AcCN in water plus 0.1% TFA)

الإجراء التجريبي

A mixture of 4-bromo-2-methyl-1-{[2-methyl-3-(trifluoromethyl)phenyl]methyl}-6-(4-morpholinyl)-1H-benzimidazole, prepared as described in Example 62 (200 mg, 0.427 mmol), trimethylboroxine (0.239 mL, 1.708 mmol), Pd(Ph3P)4 (49.4 mg, 0.043 mmol) and potassium carbonate (118 mg, 0.854 mmol) in 1,4-Dioxane (2.5 mL)/Water (0.25 mL) was irradiated at 120° C. in a microwave synthesizer for 40 min, then cooled and poured into water. The mixture was extracted with ethyl acetate. The extracts were washed with brine, dried (Na2SO4) and evaporated under reduced pressure. The residue was purified by RP-HPLC (25-45% AcCN in water plus 0.1% TFA) to give the desired compound (77 mg, 0.181 mmol, 42.5% yield) as a white solid (contains 3-5% of the 4-H compound). 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 7.58 (d, J=8.08 Hz, 1H), 7.12 (t, J=7.83 Hz, 1H), 6.80 (d, J=1.01 Hz, 1H), 6.51 (d, J=7.83 Hz, 1H), 6.40 (d, J=1.77 Hz, 1H), 5.26 (s, 2H), 3.78-3.91 (m, 4H), 3.01-3.15 (m, 4H), 2.67 (s, 3H), 2.56 (s, 3H), 2.50 (s, 3H). MS (ES+) m/e 404.1 [M+H]+. (NOTE: The reaction was repeated using PdCl2(dppf) as catalyst. Less (to negligible) reduction was observed).

المصدر