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A novel electrocatalyzed method for the preparation of dibenzosiloles was developed through intramolecular C−H/Si−H dehydrogenative coupling strategy starting from biarylhydrosilanes. Both electro‐donating and electro‐withdrawing substitution groups were tolerated for this transformation, and the desired dibenzosilole products could be obtained in moderate to excellent yields. A sila‐Friedel‐Crafts reaction mechanism was proposed on the basis of previous literature and our controlled experiments.

An efficient asymmetric approach to access functionalized pyrido-and pyrrolo[1,2-c][1,3]oxazin-1-ones has been developed through a nucleophilic addition−cyclization process of N,O-acetal with ynamides. A number of substituted ynamides 8a−8o and 3silyloxypyrrolidine or piperidine N,O-acetals 6a, 7 were amenable to this transformation, and the desired products 9a−9o, 10a−10m were obtained with excellent regioselectivities and outstanding diastereoselectivities. Moreover, chiral ynamides 14a−14f could also experience this addition−cyclization process to afford products 15a− 15f in excellent yields. Article pubs.acs.org/joc

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