Unprecedented oxidative addition of α-halo acyl halides to 6,6-dialkoxyfulvene

Abstract
In contrast to the [2 + 2] cycloaddition of fulvenes and ketenes, fulveneketene acetal, 2-cyclopentadienylidene-1,3-dioxolane, reacts with α-halo acyl halides to give various C-1 substituted fulvenes that constitute an important class of intermediates for organic synthesis.

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