3-Isoxazolamine, 5-(1,1-dimethylethyl)- → HCID 25204104, compound

Participants

Reaction Conditions

Reaction Steps

To a mixture of 4-iodo-N-thiazol-2-yl-benzenesulfonamide (50 mg, 0.1 mmol, 1.0 equiv), tris(dibenzylideneacetone)dipalladium(0) (5 mg, 0.005 mmol, 0.04 equiv), 9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene (10 mg, 0.0016 mmol, 0.12 equiv) and 3-amino-5-tert-butylisoxazole (23 mg, 0.16 mmol, 1.2 equiv) in 1.8 mL of anhydrous 1,4-dioxane was added sodium tert-butoxide (39 mg, 0.41 mmol, 3.0 equiv). The vial was capped, and the reaction mixture was heated 30 min at 150° C. in the microwave. The crude reaction mixture was filtered through celite then concentrated in vacuo. The residue was taken up in chloroform-methanol, concentrated onto celite, and purified via automated flash chromatography (12 g SiO2, gradient from hexanes to ethyl acetate). The appropriate fractions were collected, concentrated in vacuo, then purified further via reverse phase HPLC. The solvent was removed by lyophilization to afford the product as a white solid (9 mg, 20%).

Provenance & Evidence