Alkoxyvinyl thionium ions in intramolecular 4+ 3 cycloaddition reactions

…, VR Fletcher, RJ Claassen

文献索引：Harmata, Michael; Fletcher, Vernon R.; Claassen, R. J. Journal of the American Chemical Society, 1991 , vol. 113, # 26 p. 9861 - 9862

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被引用次数: 44

摘要

We recently reported new methodology for the intramolecular 4+ 3 cycloaddition reaction based on the paradigm defining the" chameleon" nature of the sulfone functional group.'-3 Thus, treatment of a solution of sulfone 1 in CH2CI2 with TiC1, gave cycloadduct 2 as a single isomer in good yield (eq l).'Unfortunately, the generality of this process is limited by the reluctance of alkoxyallylic sulfones with less alkyl substitution to undergo the reaction., ...