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Rhodium-Catalyzed Borylative Cyclization of 2-Alkynylaryl Isocyanates with Bis(pinacolato)diboron

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journal contribution
posted on 01.05.2008, 00:00 by Tomoya Miura, Yusuke Takahashi, Masahiro Murakami
2-Alkynylaryl isocyanates reacted with bis(pinacolato)diboron in the presence of a cationic rhodium(I) catalyst to produce borylated 3-alkylideneoxindoles stereoselectively. The carbon−boron linkage formed was further transformed via reactions such as a cross-coupling and a halogenation reaction.