反应 #156824

反应方程式

triphenyl phosphite

Methyl 6-((2-methoxy-2-oxoethyl)(methyl)amino)-5-nitronicotinate

hydrogen

→

title compound

收率 68.8%

Methyl 4-methyl-2-oxo-1,2,3,4-tetrahydropyrido[2,3-b]pyrazine-7-carboxylate

收率 68.8%

溶剂

dichloromethane

dichloromethane

反应条件

后处理

1. 1
   温度was then refluxed for 30 min
2. 2
   过滤The hot solution was filtered through a pad of celite
3. 3
   洗涤washed with hot dichloromethane (3×20 mL)
4. 4
   浓缩The filtrate was concentrated in vacuo

实验过程

Methyl 6-((2-methoxy-2-oxoethyl)(methyl)amino)-5-nitronicotinate (2.7 g, 9.53 mmol) was dissolved in dichloromethane (10 mL). To the yellow solution was added ammonium metavanadate (30.0 mg, 0.256 mmol), triphenyl phosphite (aprox 30 ul, 0.097 mmol), and Pt/C (300 mg, 5% w/w). The reaction mixture was pressurized with hydrogen gas (110 psi) and stirred at room temperature for 16 h. The reaction was then depressurized and diluted with dichloromethane (100 mL) which was then refluxed for 30 min. The hot solution was filtered through a pad of celite and washed with hot dichloromethane (3×20 mL). The filtrate was concentrated in vacuo to yield the title compound (1.45 g, 68%) as a white solid. [M+H] calc'd for C10H11N3O3, 222; found, 222.

来源