6,7,8-tetrahydronaphthyl analogues have been synthesized via vinylation of cyclic ketones, subsequent lactonisation and thermally induced, inverse electron demand hetero Diels-Alderreaction. The diversity of the obtained products derives from the multiplicity of cyclic ketones and from the variety of dienophiles of the Diels-Alderreaction.
Inverse electron demand diels-alder reaction of 3-carbomethoxy-2-pyrones with 1,1-dimethoxyethylene: a simple and mild method of aryl annulation
作者:Dale L. Boger、Michael D. Mullican
DOI:10.1016/s0040-4039(00)85651-8
日期:1982.1
A simple process for aryl annulation based on the inverse electron demand Diels-Alder reaction of 5,6-substituted-3-carbomethoxy-2-pyrones with 1,1-dimethoxyethylene is described.
transformation reaction using dimethylsulfoxonium methylide, a novel reaction was identified by which 5,6,7,8-tetrahydrocoumarin with the electron-withdrawing group at C3 was led to the spirobicyclo[3.1.0]hexane-cyclohexane derivative. Moreover, by establishing the scope of this reaction, it was confirmed that it is possible to apply this reaction to not only ring-fused α-pyrone derivatives but also a
Inverse electron demand Diels-Alder reactions of 3-carbomethoxy-2-pyrones. Controlled introduction of oxygenated aromatics: benzene, phenol, catechol, resorcinol, and pyrogallol annulation. Regiospecific total synthesis of sendaverine and a preparation of 6,7-benzomorphans
作者:Dale L. Boger、Michael D. Mullican
DOI:10.1021/jo00195a033
日期:1984.10
Thermal reactions of cyclopropenone ketals. Key mechanistic features and scope of the cycloaddition reactions of delocalized singlet vinylcarbenes: three-carbon 1,1-/1,3-dipoles