N,N,N',N'-Tetramethylazodicarboxamide → HCID 42635829, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of (5-methyl-3-phenyl-isoxazol-4-yl)-methanol (100 mg, 0.53 mmol) in THF (6 mL) was added 2-hydroxyquinoxaline (77 mg, 0.53 mmol) and tributyl phosphine (206 μL, 0.79 mmol) at ambient temperature under an argon atmosphere. After cooling to 0° C., N,N,N′,N′-tetramethylazodicarboxamide (137 mg, 0.79 mmol) was added. The resulting orange solution was stirred for 16 h at ambient temperature followed by 2.5 h at 50° C. Then triphenylphosphine (208 mg, 0.79 mmol), 2-hydroxyquinoxaline (77 mg, 0.53 mmol) and diethyl azodicarboxylate (127 μL, 0.79 mmol) were added and the reaction mixture was stirred for 4 h at 50° C. The reaction mixture was then evaporated. Purification by chromatography (SiO2, heptane:ethyl acetate=95:5 to 0:100) afforded the title compound (67 mg, 40%) as a white solid. MS: m/e=318.2 [M+H]+.

Provenance & Evidence