Palladium(II)-Catalyzed
Tandem Oxidative Acetoxylation/<i>ortho</i> C–H Activation/Carbocyclization
of Arylallenes
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Abstract
Herein
we report an example of tandem oxidative acetoxylation/carbocyclization
of arylallenes <b>1</b> using Pd(OAc)<sub>2</sub>. The catalytic
protocol is highly selective and provides access to new C–C
and C–O bonds leading to a carbocyclization. The reaction proceeds
via C–H activation by Pd. Mechanistic investigations show that
the C–H activation is not the rate-limiting step and indicate
that the reaction proceeds via acetoxylation of the allene
