Abstract
On heating 5, 5-dimethyl-1, 3-cyclohexanedione with a reagent, triethyl ammoniumformate, given by 5HCOOH·2N (C2H5) 3, methylation at its 2-position was induced. Thisreaction appears refered to as a methylation of active methylene compound as is previouslyrealized in 5-methylation of barbituric acids. Route of the reaction was revealedand found to involve some characteristic intermediate reduction steps induced by formicacid, that is, hydrogenation of carbon-carbon double bond and reductive fission of carboncarbonsingle bond of intermediate compounds.
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