Abstract
The reaction of alkenyldiazo compounds with styrene derivatives in the presence of [Au(IPr)(MeCN)][SbF6] provided cyclopentene derivatives resulting from a formal [3+2] cycloaddition reaction as major products. This reaction outcome stands in marked contrast to that previously observed for other olefinic derivatives. From a mechanistic point of view, this process would involve the initial generation of a highly electrophilic alkenylgold carbene intermediate, which would be subsequently involved in a stepwise carbocationic process.
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