Synthesis of π-Extended Siloles Using Intramolecular Chain Hydrosilylation

This paper is dedicated to Professor Marian Mikolajczyk on the occasion of his 80^th birthday.

Abstract

Intramolecular chain hydrosilylation afforded benzo- and naphtho-fused siloles in 20–81% yields from the corresponding hydrosilanes in the presence of a small amount of trityl tetrakis(pentafluorophenyl)borate as an initiator. This hydrosilylation can be applied for the synthesis of disiloles such as 1,5-disila-1,5-dihydro-s-indacene and naphthodisiloles.

Key words

silole - silyl cation - chain hydrosilylation - cyclization - metal-free

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