Cyclopentanone → 6-[(3-Cyclopentyl-2,3,4,5-tetrahydro-1H-3-benzazepin-7-yl)oxy]-N-methyl-3-pyridinecarboxamide

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Reaction Steps

N-Methyl-6-(2,3,4,5-tetrahydro-1H-3-benzazepin-7-yloxy)-3-pyridinecarboxamide (D40) (150 mg, 0.5 mmol) was dissolved in 2.5% acetic acid in methanol (5 ml) and treated dropwise with cyclopentanone (0.09 ml, 1 mmol). The mixture was stirred for 30 minutes and then (polystyrylmethyl)trimethylammonium cyanoborohydride (2.04 mmol/g, 490 mg, 0.1 mmol) was added. The reaction mixture was stirred at room temperature for 14 hours, applied to a SCX cartridge (Varian bond-elute, 10 g) and washed with methanol and then a mixture of 0.880 ammonia/methanol. The combined basic fractions were concentrated in vacuo and the resulting residue purified by column chromatography eluting with a mixture of 0.880 ammonia:methanol:dichloromethane (0.25:2.25:97.5) to afford the title compound (E223). MS (ES+) m/e 366 [M+H]+.

Provenance & Evidence