A new strategy for the construction of polycycles bearing a nitrogen atom on the ring fusion
作者:Reynald Deléens、Arnaud Gautier、Serge R Piettre
DOI:10.1016/s0040-4039(02)00946-2
日期:2002.7
Nitroethylenes bearing either a phenylthio or a selenoether group in β-position are efficient synthetic equivalents of nitroacetylene. A [4+2] cycloaddition/carbenoid-mediated elimination of PhS(e)CH3/[4+2] cycloaddition sequence of reactions is shown to produce formal biscycloadducts or nitroacetylene in high yields. The cycloaddition reactions are activated by high-pressure and proceed with high
Regioselective preparation of cyclohexadienes or aromatic nitro compounds by Diels-Alder reactions of .beta.-sulfonylnitroolefins or .beta.-sulfinylnitroethylene