Synthesis of pyridine-fused siloles by ruthenium-catalyzed intramolecular hydrosilylation

Abstract

The synthesis and ruthenium-catalyzed hydrosilylation reactions of 3-dimethylsilyl-2-ethynylpyridine derivatives (1a–1d) are described. The reaction of 1a and 1b in the presence of a ruthenium catalyst gave the corresponding pyridine-fused siloles (2a and 2b) through intramolecular hydrosilylation. The UV–Vis absorption and fluorescence properties of 2a and 2b were investigated, and DFT calculations were performed to understand their photophysical properties.