Methyl iodide → 2-Chloro-9-cyclopentyl-7,7-dichloro-5-methyl-5,7,8,9-tetrahydro-pyrimido[4,5-b][1,4]diazepin-6-one

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Reaction Steps

To a solution of 0.60 g (0.0018 mole) of 2-chloro-9-cyclopentyl-7,7-dichloro-5,7,8,9-tetrahydro-pyrimido[4,5-b][1,4]diazepin-6-one (VI-298) in 12 mL of dimethylformamide was added 0.88 g (0.0027 mole) of cesium carbonate, followed by 0.34 mL (0.0054 mole) of iodomethane. After stirring four hours, the mixture was filtered and then concentrated under reduced pressure. Ice water was added to the residue and the resulting solid was collected by filtration, washed with water and dried under vacuum to give 0.47 g of 2-chloro-9-cyclopentyl-7,7-dichloro-5-methyl-5,7,8,9-tetrahydro-pyrimido[4,5-b][1,4]diazepin-6-one (VII-298) as a white solid.

Provenance & Evidence