Succinic anhydride → HCID 69206585, compound

Participants

Reaction Steps

A solution of 4-(6-amino-pyridin-3-yl)-azepane-1-carboxylic acid tert-butyl ester (614 mg, 2.10 mmol) in toluene (10 mL) was refluxed in a Dean-Stark apparatus for 3 h. The heat was removed and when the reflux subsided 6-bromo-8-cyclopentyl-2-methanesulfinyl-5-methyl-8H-pyrido[2,3-d]pyrimidin-7-one (700 mg, 1.89 mmol) was added. This mixture was refluxed for 12 h under N2. Succinic anhydride (500 mg) was added and the reflux continued for 3 h. The reaction mixture was cooled and dissolved in ethyl acetate (100 ml) and the organic layer was washed with water (100 mL total). The organic layer was dried over magnesium sulfate and the solvents evaporated. The crude product was subjected to chromatography on silica gel and eluted with a chloroform/2-propanol gradient to give 4-[6-(6-bromo-8-cyclopentyl-5-methyl-7-oxo-7,8-dihydro-pyrido[2,3-d]pyrimidin-2-ylamino)-pyridin-3-yl]-azepane-1-carboxylic acid tert-butyl ester as a yellow powder (414 mg, 0.82 mmol). MS (APCI+) 500, 600 (M+1, 100).

Provenance & Evidence