B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>‑Catalyzed Synthesis of Benzofused-Siloles
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The dehydrosilylation of 2-(SiR2H)-biphenyls catalyzed by B(C6F5)3 and a weak base forms silafluorenes with H2 as the only byproduct. Attempts to extend this approach to synthesize siloles derived from 2,2′-bithiophenes and N-Me-2-Ph-indole resulted in competing reactivity, including protodesilylation. B(C6F5)3 also catalyzed the one-pot, two-step formation of silaindenes from aryl-alkynes by alkyne trans-hydrosilylation, followed by an intramolecular Sila-Friedel–Crafts reaction facilitated by a weak base.
创建时间：
2016-02-16
