反应 #1256706

反应方程式

3

4-(4-methoxy-2,6-dimethyl-phenyl)-3,5-dimethyl-pyridin-1-ol

sodium hypophosphite hydrate

→

title compound

收率 97.9%

4-(4-methoxy-2,6-dimethyl-phenyl)-3,5-dimethyl-pyridine

收率 97.9%

溶剂

acetic acid

反应条件

后处理

1. 1
   过滤filtered
2. 2
   浓缩concentrated in vacuo
3. 3
   workup.DISSOLUTIONThe resulting light-yellow oil was dissolved in chloroform (250 mL)
4. 4
   洗涤washed successively with saturated NaHCO3 (aq.), water, and brine
5. 5
   其他The organic layer was then separated
6. 6
   干燥dried over MgSO4
7. 7
   过滤filtered
8. 8
   浓缩concentrated in vacuo
9. 9
   其他The resulting pale-yellow solid was purified by flash chromatography on silica gel eluting with 1:1 hexane

实验过程

To a mixture of 3 (6.55 g, 25.5 mmol) and palladium (10 wt. % on activated carbon; 3.05 g, 2.8 mmol) in acetic acid (150 mL) was added sodium hypophosphite hydrate (6.7 g, 63 mmol) in a single portion at 80° C. The reaction mixture was stirred at 80° C. under N2 for 12 h, then filtered and concentrated in vacuo. The resulting light-yellow oil was dissolved in chloroform (250 mL) and washed successively with saturated NaHCO3 (aq.), water, and brine. The organic layer was then separated, dried over MgSO4, filtered, and concentrated in vacuo. The resulting pale-yellow solid was purified by flash chromatography on silica gel eluting with 1:1 hexane: ethyl acetate, to give 6.01 g (97.9%) of the title compound as colorless solid: mp 87-88° C.; 1H NMR (400 MHz, CD2Cl2): δ 8.334 (s, 2H), 6.707 (s, 2H), 3.804 (s, 3H), 1.892 (s, 6H), 1.851 (s, 6H); 13C NMR (100 MHz, CD2Cl2): δ 159.330, 148.939, 148.420, 136.373, 131.905, 129.958, 113.489, 55.556, 20.188, 16.831; MS (APCI): m/z 242.2 [(M+H)+, 100]; Anal. Calcd. For C16H19NO: C, 79.63; H, 7.94; N, 5.80. Found: C, 79.39; H, 7.94; N, 5.75.

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