134255-41-7Relevant academic research and scientific papers
Reactions of Methoxynaphthalenes with Active Methylene Compounds in the Presence of Manganese(III) Acetate
Tsunoda, Katsunori,Yamane, Mitsuyoshi,Nishino, Hiroshi,Kurosawa, Kazu
, p. 851 - 856 (1991)
The reaction of methoxynaphthalenes with malonamide in the presence of manganese(III) acetate gives 2-acetoxy-2-(1-naphthyl)propanediamides and 2-hydroxy-2-(1-naphthyl)propanediamides.It was found that the propanediamidation reaction did occur when naphthalenes have electron-donating substituents, such as a methoxyl group.The reactions of methoxynaphthalenes with ethyl 3-oxobutanoate, 2-cyanoacetamide, and malononitrile in the presence of manganese(III) acetate also yielded the corresponding substituted naphthalenes, ethyl 2-(acetoxymethyl)naphthofuran-1-carboxylates, and/or a 4-methylene-1(4H)-naphthalenone.The reaction mechanisms are discussed.
Manganese(III)-Mediated Carbon-Carbon Bond Formation in the Reaction of Xanthenes with Active Methylene Compounds
Nishino, Hiroshi,Kamachi, Hironori,Baba, Harumi,Kurosawa, Kazu
, p. 3551 - 3557 (2007/10/02)
Oxidation of xanthenes with manganese(III) acetate in the presence of active methylene compounds such as 1,3-dicarbonyl compounds, malononitrile derivatives, acetone, and nitromethane selectively gives 9-substituted xanthene derivatives in good yields.A similar oxidation of thioxanthene also yields 2-(9-thioxanthenyl)-1,3-dicarbonyl compounds in 57-91 percent yields.The obtained 2-(9-xanthenyl)-1,3-dicarbonyl compounds are readily converted to 2-(9-xanthenylidene)-1,3-dicarbonyl derivatives using manganese(III) complexes or 2,3-dichloro-5,6-dicyano-1,4-benzoquinone.The mechanisms for the formation of 9-substituted xanthenes are discussed on the basis of the reaction intermediates, the electron-donating substituent effect on the xanthene ring system, effect of additives, and comparison with a reaction of radical-trapping reagents.
