1,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine) → HCID 57551215, compound

Participants

Reaction Conditions

Reaction Steps

To a mixture of 4-iodo-N-thiazol-2-yl-benzenesulfonamide (100 mg, 0.3 mmol, 1.0 equiv), tris(dibenzylideneacetone)dipalladium(0) (10 mg, 0.01 mmol, 0.04 equiv), 9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene (19 mg, 0.033 mmol, 0.12 equiv) and 2,5-di-tert-butyl-2H-pyrazole-3-ylamine (70 mg, 0.36 mmol, 1.2 equiv) in 4.0 mL of anhydrous 1,4-dioxane was added sodium tert-butoxide (100 mg, 0.90 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 dissolved in 0.5 mL of 1:1 dimethyl sulfoxide-acetonitrile then purified further via reverse phase HPLC. The appropriate fractions were lyophilized from water-acetonitrile to afford the product as an off-white solid (32 mg, 20%).

Provenance & Evidence