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1. Cationic rhodium(I)/BIPHEP complex-catalyzed cross-cyclotrimerization of silylacetylenes and unsymmetrical electron-deficient internal alkynes.

Author

Heya, Arisa, Namba, Tomoya, Hara, Jun, Shibata, Yu, and Tanaka, Ken

Subjects
*RHODIUM compounds, *CATIONS, *METAL ions, *METAL complexes, *METAL catalysts, *TRIMERIZATION, *ACETYLENE, *ELECTRON-deficient compounds
Abstract

It has been established that a cationic rhodium(I)/BIPHEP complex catalyzes the chemo- and regioselective intermolecular cross-cyclotrimerization of silylacetylenes with unsymmetrical electron-deficient internal alkynes. Chemoselectivity was highly dependent on steric bulk of the unsymmetrical electron-deficient internal alkynes used. Two molecules of sterically less demanding alkynoates and alkynone reacted with one molecule of the silylacetylene, on the contrary, one molecule of a sterically demanding alkynoate reacted with two molecules of the silylacetylene. [ABSTRACT FROM AUTHOR]

Published
2015
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