Реакция #75425

Уравнение реакции

methyl chloroformate

(R)-1,2,3,4-tetrahydro-1-methoxy-2-oxo-3-quinolinamine

sodium bicarbonate

→

title compound

Выход 99.0%

Methyl (R)-N-(1,2,3,4-tetrahydro-1-methoxy-2-oxo-3-quinolinyl)carbamate

Выход 99.0%

Растворители

chloroform

chloroform

water

pentane

Условия реакции

Обработка

1. 1
   Другоеthe layers were separated
2. 2
   ЭкстракцияThe aqueous layer was extracted with diethylether
3. 3
   Промывкаthe combined organic extracts were washed with brine
4. 4
   Сушкаdried (MgSO4)
5. 5
   ДругоеThe solvent was removed under vacuum
6. 6
   Другоеto leave an amber oil
7. 7
   ДругоеPurification by flash chromatography (230-400 mesh silica gel, 35-40% ethyl acetate in hexane)

Методика

A solution of methyl chloroformate (42.8 g, 0.453 mol) in chloroform (50 ml) was added to a mixture of (R)-1,2,3,4-tetrahydro-1-methoxy-2-oxo-3-quinolinamine 1 (M. Kawase, T. Kitamura, Y. Kikugawa, J. Org. Chem., 54, 1989 3394-3403)(0.15 mol) and sodium bicarbonate (50.4 g, 0.600 mol) in chloroform (250 ml) and water (100 ml) over a period of 10 minutes at 0° C. The mixture was stirred overnight at room temperature, diluted with pentane, and the layers were separated. The aqueous layer was extracted with diethylether, and the combined organic extracts were washed with brine and dried (MgSO4). The solvent was removed under vacuum to leave an amber oil. Purification by flash chromatography (230-400 mesh silica gel, 35-40% ethyl acetate in hexane) gave the title compound as a light yellow oil (37.0 g, 99%).

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