title: Rhodium-catalyzed annulation reactions of 2-cyanophenylboronic acid with alkynes and strained alkenes.
abstract: [reaction: see text]. A new [3 + 2] annulation reaction was developed in which 2-cyanophenylboronic acid reacted as a three-carbon component with alkynes or alkenes to afford substituted indenones or indanones. The use of an alkynoate even produced benzotropone, a formal [3 + 2 + 2] adduct. The cyclic skeletons were constructed by intramolecular nucleophilic addition of an intermediate organorhodium(I) species to a cyano group.
authors: Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Japan.
authors: Tomoya
authors: T
authors: Miura
authors: Masahiro
authors: M
authors: Murakami