Tris(hydroxymethyl)aminomethane → HCID 11221703, compound

Participants

Reaction Steps

A suspension of Polystyrene bound carbodiimide (570 mg, 0.73 mmol) and 4,4-Difluoro-2-[([1,4]oxazepane-4-carbonyl)-amino]-heptanoic acid (135 mg) in DCM (10 mL) stirred for 10 min. HOBT (60 mg) added, stirred for 10 min. A suspension of amino acetonitrile hydrochloride (34 mg) and triethyl amine (52 μL) in DCM (5 mL) added and stirred overnight at room temperature. PS-Trisamine (493 mg) added and stirred at room temperature for 2 h 30 min. After filtration, filtrate diluted with DCM, washed with water, evaporated under reduced pressure and purified by column chromatography eluting with ethyl acetate heptane mixture to give Perhydro-1,4-oxazepine-4-carboxylic acid [(S)-1-(cyanomethyl-carbamoyl)-3,3-difluoro-hexyl]-amide as a solid.

Provenance & Evidence