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Photocatalytic Cycloaddition Reaction of Triarylphosphines with Alkynes Forming Cyclic Phosphonium Salts
preprintsubmitted on 27.05.2021, 04:43 and posted on 28.05.2021, 04:54 by Yusuke Masuda, Daichi Ikeshita, Masahiro Murakami
Herein reported is a photocatalytic cycloaddition reaction of triarylphosphines with alkynes. Phosphonium salts of unique bicyclic structures are synthesized through a radical pathway under mild reaction conditions. The phosphonium salts are subjected to the Wittig olefination reaction to afford structurally interesting phosphine oxides.