HCID 21537926, compound → HCID 178422220, compound

Participants

Reaction Steps

Into a flask equiped with a magnetic stirring bar is charged 5.0 grams of the 5-methyl-3-(4-pyridyl)-3,3a,4,5-tetrahydro-2H-naphtho[1,2-c]pyrazole prepared as in example 3, 25 grams of activiated manganese dioxide and 150 ml of dry benzene. The mixture is stirred for about 12 hours at room temperature, after which the manganese salts are filtered off and the solvent removed in vacuo. The solid is crystallized from ethanol to yield 4,5-dihydro-2-methyl-3-(4-pyridyl)-2H-naphtho.[1,2-c]pyrazole.

Provenance & Evidence