Reaction of Arylaliphatic 2-Methylene-1,5-diketones with Phenylhydrazine.-2-Methylene-1,5-diketones react with phenylhydrazine in DMF at room temp. to provide N-phenylaminotetrahydropyridine derivatives (cf. (III) , (V)). In some cases, minor amounts of N-phenylpyrazoles are obtained additionally. Mechanistic suggestions are discussed. -(BAGRINA, N. P.; PAVEL', G. V.; VYSOTSKII, V. I.; TILICHENKO, M. N.; Zh.

No abstract

No abstract

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Reactions of 2-Methylene-1,5-diphenyl-1,5-pentanediones with CH Acids.-In the reaction of title methylenediphenylpentanediones (I) and (XI) with various malonate-derived CH-acids, a wide variety of reaction products is obtained depending on the substitution pattern of both educts. Thus, with the 3,4-unsubstituted pentanedione (I) a cyclization proceeds subsequently after the initial adduct formation, but involvement of the nitrile or carbonyl functionalities of CH-acids generates a different product in every case. In the case of fully substituted pentanediones (XI), cyclization proceeds only with acetoacetate (VI), while with the other CH-acids the initial Michael adduct is isolated. -(BAGRINA, N. P.; PAVEL, G. V.; TILICHENKO, M. N.; VYSOTSKII, V. I.; Russ.