反应详情

A solution of 6-methyl-1,2,3,4-tetrahydroquinoline (3.0 g) and ethyl acetoacetate (2.8 g) in xylene (7.0 ml) containing 2 drops of dry pyridine was refluxed for 12 hours. The solution was then allowed to cool to room temperature, washed in turn with 2N hydrochloric acid (2× 20 ml) and water (2 × 20 ml), dried over anhydrous magnesium sulphate and evaporated under reduced pressure at 100° to dryness, yielding 1-acetoacetyl-6-methyl-1,2,3,4-tetrahydroquinoline (1.7 g) as a crude solid, to be used directly in the next stage.

1. temperaturewas refluxed for 12 hours
2. washwashed in turn with 2N hydrochloric acid (2× 20 ml) and water (2 × 20 ml)
3. dry with materialdried over anhydrous magnesium sulphate
4. customevaporated under reduced pressure at 100° to dryness