An efficient, highly regio-and stereoselective protocol for the synthesis of tetrasubstituted olefins was developed to take place by a palladium(0)-catalyzed triple domino process. It involves the formation of three new CÀC bonds through double carbopalladation and CÀH activation across 2-bromoaryl alkynyl biaryls/heteroaryls with norbornene. This method is practically simple with broad substrate scope and tolerates a wide range of substituents. The products bearing 9Hpyrrolo[1,2-a]indole motifs reveal intriguing solid state fluorescence properties and thus form a new class of aggregation induced emission (AIE) fluorophores.
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