Synthesis of oxygen spirocycles by manganic acetate promoted additions to exocyclic enol ether derivatives
作者:John M. Mellor、Shahid Mohammed
DOI:10.1016/0040-4039(91)85053-8
日期:1991.11
Oxidative addition, promoted by manganic acetate, of β-dicarbonyl compounds to enol lactones and related enol derivatives having an exocyclic double bond affords spirocyclic products, and addition to endocyclic enolethers gives fused acetals and ketals.
Synthesis of spirocyclic acetals by manganic acetate promoted additions to exocyclic enol ethers
作者:John M. Mellor、Shahid Mohammed
DOI:10.1016/s0040-4020(01)87231-8
日期:1993.8
Reaction of β-ketoesters and β-dicarbonyl compounds with manganic acetate in acetic acid gives intermediates, which add to exocyclic enolethers to afford a variety of interesting spirocyclic acetals. As the exocyclic enolethers are shown to be readily accessible, the results constitute a useful route based on radical chemistry to the synthesis of unsaturated spiroacetals.