Cesium carbonate → HCID 58201660, compound

Participants

Reaction Steps

A mixture of but-2-ynoic acid (2-iodo-phenyl)-amide (2.85 g, 10 mmol) and cesium carbonate (4.89 g, 15 mmol) in DMF (20 ml) was stirred for 10 minutes. 3-bromomethyl-benzoic acid methyl ester (2.52 g, 11 mmol) was added. Then the mixture was stirred for 12 hours at room temperature. After removal of solids, the filtrate was treated with water and extracted with ether. The organic layer was dried over sodium sulfate and concentrated to give the residue which was purified by flash chromatography, eluting with ethyl acetate/hexane=1:4 to afford the product 3-{[(2-iodo-phenyl)-(1-oxo-but-2-ynyl)-amino]-methyl}-benzoic acid methyl ester as yellow solid (3.03, 70%). MS calcd. for C19H16INO3 433.3, obsd. (ESI+) [(M+H)+] 434.1.

Provenance & Evidence