Morpholine → (rac)-4-[4-Cyano-2-(methylsulfanyl)phenyl]-6-methyl-2-oxo-1-[3-(trifluoromethyl)phenyl]-1,2,3,4-tetrahydropyrimidine-5-carboxylic acid

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Reaction Steps

Allyl (rac)-4-[4-cyano-2-(methylsulfanyl)phenyl]-6-methyl-2-oxo-1-[3-(trifluoromethyl)phenyl]-1,2,3,4-tetrahydropyrimidine-5-carboxylate (750 mg, 1.54 mmol; Example 39) was dissolved in THF (10 ml), and morpholine (201 mg, 2.308 mmol) was added. The reaction solution was saturated with argon (argon was bubbled through the solution for 30 min). Tetrakis(triphenylphosphine)palladium(0) (7.47 mg, 0.006 mmol) was then added, and the mixture was stirred at RT overnight. Since, by HPLC control, only little conversion could be observed, more tetrakis(triphenylphosphine)palladium(0) (7.47 mg, 0.006 mmol) was added, and the mixture was stirred at RT for a further 3 h. The contents of the flask was then filtered through kieselguhr, and the residue was washed with THF. The filtrate was concentrated under reduced pressure and the residue was recrystallized from diethyl ether (15 ml). The crystals were filtered off with suction and dried under high vacuum. This gave 663 mg (96% of theory) of the target compound.

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