Diisopropylethylamine → 1-(3,4-Methylenedioxyphenyl)-2-(5-bromopyrimidin-2-yl)-2,3,4,9-tetrahydro-1H-beta-carboline

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Reaction Conditions

Reaction Steps

To the solution of 1-(3,4-methylenedioxyphenyl)-2,3,4,9-tetrahydro-1H-β-carboline (4.38 g, 15.0 mmol) (prepared according to the process as disclosed in WO97/43287, Intermediate 7, page 24) and 2-chloro-5-bromopyrimidine (2.90 g, 15.0 mmol) (prepared as in Example 51) in dry degassed DMF (30 ml) was added N,N-diisopropylethylamine (4.2 ml, 30 mmol). The mixture was heated at 120-130° C. overnight. The mixture was then cooled and diluted with ethyl acetate. The solution was washed with 0.5 N citric acid, water and brine, then dried over Na2SO4 and concentrated in vacuo. Purification by flash column (silical gel, hexane:ethyl acetate=6:1, v/v, followed by hexane:ethyl acetate=4:1, v/v) yielded the product as a white solid.

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