Nitrogen → N-{4-[(E)-2-(2-cyclohexyl-4-oxo-1,3,8-triaza-spiro[4.5]dec-1-ene-8-sulfonyl)-vinyl]-3,5-dimethyl-phenyl}-acetamide

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-cyclohexyl-8-ethenesulfonyl-1,3,8-triaza-spiro[4.5]dec-1-en-4-one (100.0 mg, 0.307 mmol), N-(4-bromo-3,5-dimethyl-phenyl)-acetamide (112. mg, 0.461 mmol), palladium(II) acetate (10 mg, 0.0461 mmol), tris(o-tolyl)phosphine (28 mg, 0.0922 mmol), triethylamine (0.128 ml, 0.922 mmol) and DMA (1.5 ml) was added to a sealed test tube in an N2 atmosphere. This mixture was heated with stirring at 130° C. for 13.5 hours. Palladium(II) acetate (10 mg, 0.0461 mmol), tris(o-tolyl)phosphine (28 mg, 0.0922 mmol) and triethylamine (0.128 ml, 0.922 mmol) were further added to the reaction mixture at room temperature in an N2 atmosphere, and the mixture was heated with stirring at 130° C. for 14 hours. The reaction mixture was cooled and water was then added. The aqueous layer was extracted with ethyl acetate (×3). The organic layers were combined and sequentially washed with water (×2) and saturated brine, and then dried over sodium sulfate and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (CH2Cl2-MeOH) to give N-{4-[(E)-2-(2-cyclohexyl-4-oxo-1,3,8-triaza-spiro[4.5]dec-1-ene-8-sulfonyl)-vinyl]-3,5-dimethyl-phenyl}-acetamide (61.4 mg, 41%).

Provenance & Evidence