Synthesis of silyl indenes by ruthenium-catalyzed aldehyde- and acylsilane-enabled C–H alkylation/cyclization†
Guofu
Zhong 
*bc
and
Jian
Zhang
*b
*bc
and
Jian
Zhang
*b
Abstract
A ruthenium-catalyzed C–H alkylation/cyclization sequence is presented to prepare silyl indenes with atom and step-economy. This domino reaction is triggered by acyl silane-directed C–H activation, and an aldehyde controlled the following enol cyclization/condensation other than β-H elimination. The protocol tolerates a broad substitution pattern, and the further synthetic elaboration of silyl indenes allows access to a diverse range of interesting indene and indanone derivatives.
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