Imidazole → HCID 178455363, compound

Participants

Reaction Conditions

Reaction Steps

A suspension of 3-(2-chlorophenyl)-7-(trans-4-hydroxycyclohexylamino)-3,4-dihydropyrimido[4,5-d]pyrimidin-2(1H)-one (1.86 g, 5 mmol) (prepared as described in Example 73) was combined with tert-butyldimethylsilyl chloride (1.05 g, 7 mmol) and imidazole (0.75 g, 11 mmol) in dimethylformamide (35 mL). The reaction mixture was heated at 50° C. for 24 hours, cooled to room temperature and added to water, stirred for 30 minutes, filtered and dried to give 1.88 g of 3-(2-chlorophenyl)-7-(trans-4-tert-butyl-dimethylsilyloxycyclohexylamino)-3,4-dihydropyrimido[4,5-d]pyrimidin-2(1H)-one, m.p.289-294° C.

Provenance & Evidence