Advanced Synthesis & Catalysis

Visible Light Photoredox Catalyzed Cascade Cyclizations of α??Bromochalcones or α??Bromocinnamates with Heteroarenes

S Paria, O Reiser

Index: Paria, Suva; Reiser, Oliver Advanced Synthesis and Catalysis, 2014 , vol. 356, # 2-3 p. 557 - 562

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Citation Number: 16

Abstract

Abstract: Vinyl radicals were generated from α-bromochalcones or α-bromocinnamate ethyl ester under visible light photoredox catalyzed conditions via an oxidative quenching cycle of the iridium complex [Ir {dFACHTUNGTRENNUNG (CF3) ppy} 2ACHTUNGTRENNUNG (dtbbpy)] PF6 and subjected to cascade cyclizations with heteroarenes entailing two consecutive CÀC bond formations and three CÀH activations. The process is amenable to ...