Cesium carbonate → HCID 68796911, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 2.0 g of the compound of Example 2 in 30 ml of toluene, 22.35 g of tert-butyl hydrazine carboxylate, 1.43 g of cesium carbonate, 400 mg of tris(dibenzylideneacetone)dipalladium (0), and 740 mg of 1,1′-bis(diphenylphosphine)ferrocene were added, and the mixture was stirred at 100° C. for 4 hours. After cooling the reaction solution, insoluble matter was filtered, and EtOAc and 10% citric acid aqueous solution were added to the filtrate to extract it. The organic layer was washed with water and brine, and dried over anhydrous sodium sulfate anhydride. After evaporation of the solvent, the residue was purified by silica gel column chromatography (hexane-EtOAc (2:1)) to obtain 1.0 g of tert-butyl 1-(4-{[(5Z)-4,4-difluoro-5-(2-methyl-2-oxoethylidene)-2,3,4,5-tetrahydro-1H-1-benzazepin-1-yl]carbonyl}-3-methylphenyl)hydrazine carboxylate.

Provenance & Evidence