5-[4-(6,6-Dimethyl-5,6,7,8-tetrahydroquinazolin-4-yl)-2,3,4,5-tetrahydro-1,4-benzoxazepin-7-yl]-3-nitropyridin-2-amine → 5-[4-(6,6-Dimethyl-5,6,7,8-tetrahydroquinazolin-4-yl)-2,3,4,5-tetrahydro-1,4-benzoxazepin-7-yl]pyridine-2,3-diamine

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Reaction Steps

A mixture of 5-[4-(6,6-dimethyl-5,6,7,8-tetrahydroquinazolin-4-yl)-2,3,4,5-tetrahydro-1,4-benzoxazepin-7-yl]-3-nitropyridine-2-amine (0.5 g, 1.37 mmol) and palladium on carbon (0.5 g, 50% water) in methanol (50 mL) was hydrogenated in a Parr apparatus at 40 psi for 90 min. The mixture was filtered through celite and concentrated. Column chromatography of the residue on silica (dichloromethane/methanol 9:1) provided 5-[4-(6,6-dimethyl-5,6,7,8-tetrahydroquinazolin-4-yl)-2,3,4,5-tetrahydro-1,4-benzoxazepin-7-yl]pyridine-2,3-diamine (174 mg, 30% yield over 2 steps) as a brown solid. MS (EI) for C24H28N6O: 417 (MH+).

Provenance & Evidence