تفاعل #11473

معادلة التفاعل

N-{2-[(3-amino-5,6-dimethyl-2-phenoxypyridin-4-yl)amino]-1,1-dimethylethyl}acetamide

triethylamine

ethoxyacetyl chloride

→

N-{2-[2-(ethoxymethyl)-6,7-dimethyl-4-phenoxy-1H-imidazo[4,5-c]pyridin-1-yl]-1,1-dimethylethyl}acetamide

المردود 45.6%

المذيبات

CH2Cl2

ظروف التفاعل

المعالجة

1. 1
   تركيزthe reaction mixture was concentrated under reduced pressure
2. 2
   workup.ADDITIONtreated with 3 mL of triethylamine
3. 3
   درجة الحرارةThe solution was heated
4. 4
   درجة الحرارةto reflux for 4 d
5. 5
   تركيزThe reaction mixture was then concentrated
6. 6
   workup.DISSOLUTIONredissolved in 50 mL of xylenes
7. 7
   workup.ADDITIONtreated with pyridinium hydrochloride (0.5 g)
8. 8
   درجة الحرارةthe mixture was heated
9. 9
   درجة الحرارةto reflux for 4 d
10. 10
    تركيزThe reaction mixture was concentrated
11. 11
    غسيلwashed with saturated NaHCO3 solution, H2O (2×) and brine
12. 12
    تجفيفThe organic portion was dried over Na2SO4
13. 13
    تركيزconcentrated
14. 14
    أخرىThe resulting syrup was purified by column chromatography (SiO2, 80% EtOAc/hexanes)

الإجراء التجريبي

A solution of N-{2-[(3-amino-5,6-dimethyl-2-phenoxypyridin-4-yl)amino]-1,1-dimethylethyl}acetamide (1.80 g, 5.23 mmol) in 50 mL of CH2Cl2 was cooled to 0° C., under N2, and treated with triethylamine (728 μL, 5.23 mmol) and ethoxyacetyl chloride (574 μL, 5.23 mmol). After stirring overnight, the reaction mixture was concentrated under reduced pressure. The resulting syrup was taken up in 50 mL of EtOH and treated with 3 mL of triethylamine. The solution was heated to reflux for 4 d. The reaction mixture was then concentrated and redissolved in 50 mL of xylenes and treated with pyridinium hydrochloride (0.5 g) and the mixture was heated to reflux for 4 d. The reaction mixture was concentrated and taken up in 100 mL of EtOAc and washed with saturated NaHCO3 solution, H2O (2×) and brine. The organic portion was dried over Na2SO4 and concentrated. The resulting syrup was purified by column chromatography (SiO2, 80% EtOAc/hexanes) to give N-{2-[2-(ethoxymethyl)-6,7-dimethyl-4-phenoxy-1H-imidazo[4,5-c]pyridin-1-yl]-1,1-dimethylethyl}acetamide (980 mg) as a mustard colored foam.

المصدر