Studies on the origin of dihydrofurans from .alpha.-diazocarbonyl compounds. Concerted 1,3-dipolar cycloaddition vs. nonsynchronous coupling in the copper chelate catalyzed reactions of .alpha.-diazodicarbonyl compounds with electron-rich olefins
Synthesis of fused acetal derivatives by manganic acetate promoted additions to endocyclic enol ethers
作者:John M. Mellor、Shahid Mohammed
DOI:10.1016/s0040-4020(01)87230-6
日期:1993.8
Reaction of manganic acetate in acetic acid with β-diketones and β-ketoesters leads to generation of intermediates, which add efficiently to endocyclic unsaturated enolethers to afford fused acetals.
Tetrabutylammonium Peroxydisulfate in Organic Synthesis; IX: A Convenient Approach to the Synthesis of Fused Acetal Derivatives by Tetrabutylammonium Peroxydisulfate-Mediated Oxidative Cycloaddition of 1,3-Dicarbonyl Compounds to Cyclic Enol Ethers
作者:Fen-Er Chen、Han Fu、Ge Meng、Yu Cheng、Ye-Li Hu
DOI:10.1055/s-2000-6312
日期:——
A number of fused acetal derivatives were prepared in 82-90% yield by tetrabutylammonium peroxydisulfate-mediated oxidative cycloaddition of 1,3-diketones or 1,3-diketoesters to cyclic enol ethers in the presence of a base such as potassium acetate in acetonitrile.
Synthesis of fused acetals by ceric ammonium nitrate mediated cycloaddition of 1,3-dicarbonyl compounds to cyclic enol ethers
作者:Subhas Chandra Roy、Pijus Kumar Mandal
DOI:10.1016/0040-4020(96)00728-4
日期:1996.9
Treatment of β-diketones and β-ketoesters with ceric ammonium nitrate and sodium hydrogen carbonate in acetonitrile leads to the formation of intermediates which add efficiently to cyclic enol ethers to furnish fused acetals in good yields.
Studies on the origin of dihydrofurans from .alpha.-diazocarbonyl compounds. Concerted 1,3-dipolar cycloaddition vs. nonsynchronous coupling in the copper chelate catalyzed reactions of .alpha.-diazodicarbonyl compounds with electron-rich olefins
作者:Miguel E. Alonso、Angelina Morales、A. Wladimir Chitty