반응 #1711967

반응 방정식

3-bromo-5-methoxy-1-(2,2,6-trifluoro-1,3-benzodioxol-5-yl)pyridazin-4(1H)-one

1-phenyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole

K2CO3

→

title compound

수율 60.2%

5-Methoxy-3-(1-phenyl-1H-pyrazol-5-yl)-1-(2,2,6-trifluoro-1,3-benzodioxol-5-yl)pyridazin-4(1H)-one

수율 60.2%

용매

NaHCO3

toluene

water

반응 조건

후처리

1. 1
   온도was heated
2. 2
   온도to reflux for 18 h under Ar
3. 3
   추출extracted with AcOEt
4. 4
   건조dried over Na2SO4
5. 5
   여과filtered
6. 6
   농축concentrated in vacuo
7. 7
   기타purified by column chromatography on basic silica gel (hexane/AcOEt=50/50 to 0/100)
8. 8
   기타recrystallized with AcOEt/hexane

실험 절차

A mixture of 3-bromo-5-methoxy-1-(2,2,6-trifluoro-1,3-benzodioxol-5-yl)pyridazin-4(1H)-one (145 mg, 0.383 mmol), 1-phenyl-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (155 mg, 0.575 mmol), K2CO3 (106 mg, 0.766 mmol) and PdCl2{P(t-Bu)2(Ph-p-NMe2)}2 (13.6 mg, 0.0192 mmol) in toluene (1.9 mL) and water (0.19 mL) was heated to reflux for 18 h under Ar. The mixture was diluted with NaHCO3 aqueous solution, extracted with AcOEt, dried over Na2SO4, filtered, concentrated in vacuo and purified by column chromatography on basic silica gel (hexane/AcOEt=50/50 to 0/100) and recrystallized with AcOEt/hexane to yield the title compound (102 mg, 60% yield) as a pale yellow solid: mp 200-202° C. 1H NMR (DMSO-d6, 300 MHz): δ ppm 3.76 (3H, s), 6.97 (1H, d, J=1.9 Hz), 7.27-7.47 (6H, m), 7.79 (1H, d, J=1.9 Hz), 7.86 (1H, d, J=9.4 Hz), 8.48 (1H, d, J=1.9 Hz). Anal. Calcd for C21H13F3N4O4: C, 57.02; H, 2.96; N, 12.67.

출처