Sodium Hydroxide → HCID 12542619, compound

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Reaction Steps

A solution of 8.0 g of 1-methyl-4-(α-phenyl-2-tolyl)-4-piperidinol, Example 1, in 100 ml of 97% formic acid is refluxed with stirring for 16 hours. The solution is poured into 300 ml of water, made strongly basic with a 50% sodium hydroxide solution and the basic mixture extracted thrice with 100 ml of portions of chloroform. The combined chloroform extracts are dried and the chloroform removed leaving an oil. The oil is dissolved in 20 ml of dimethylsulfoxide. The solution is diluted with 250 ml of water leaving a cream colored solid which is recrystallized from dimethylsulfoxide to give colorless crystals, mp 55°-57° C. of 1-methyl-4-(α-phenyl-2-tolyl)-1,2,3,6-tetrahydropyridine.

Provenance & Evidence