Sulfuric Acid → HCID 13105508, compound

Participants

Reaction Conditions

Reaction Steps

0.01 mole (3 g) of [2-(4-methyl-1-piperidinyl)-5-aminophenyl]-phenyl-methanone (product of example 27; Code No. 592) is dissolved in ethanol. The mixture is cooled to 0° C. then 10 ml of sulphuric acid and 0.02 mole (1.4 g) of sodium nitrite are successively added. The mixture is stirred for 1 hour at 0° C. then allowed to return to room temperature (15°-20° C.). 0.65 g of activated copper is then added and the reaction medium is heated to 50° C. for 1 hour. After hydrolysis and neutralization, it is extracted with methylene chloride then washed with water. It is dried then the solvent is evaporated. By recrystallization from ethanol, 1 g (yield=37%) of the expected product is obtained. M.p.=82° C.

Provenance & Evidence