Polycyclic compounds containing a six-membered silacycle are important. However, we have limited knowledge of the nature of these six-membered silacycles because methodologies for their synthesis remain under-developed. Here, we have developed a one-pot enyne metathesis/Diels-Alder/oxidation methodology for the synthesis of six-membered silacycles. Some of these compounds are novel fluorophores.
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http://dx.doi.org/10.1039/c7cc02788e | DOI Listing |
Org Lett
July 2024
School of Environmental and Chemical Engineering, Wuyi University, Jiangmen, Guangdong 529020, People's Republic of China.
Selective dehydrogenative C-H silylation is one of the most powerful tools to synthesize silacycles. Herein, we developed Ru-catalyzed sequential hydrosilylation/C-H silylation of allyl-indoles and dehydrogenative O-H/C-H silylation of pyrrole phenols. Both six-membered indole silacycles and pyrrole silyl ether cycles were successfully synthesized with good functional group tolerance.
View Article and Find Full Text PDFDalton Trans
January 2024
Department of Applied Chemistry, School of Engineering, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan.
An Fe(II) bromide complex supported by a bidentate phosphine ligand and an η(C)-coordinated six-membered silacycle-bridged biphenyl-based ligand is converted upon reduction into an Fe(I) complex in which the hapticity of the silacycle-based ligand increases from η to η.
View Article and Find Full Text PDFACS Omega
July 2023
Department of Applied Chemistry, School of Engineering Science, and Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan.
Treatment of 2,6-dimethyl-1,1'-biphenyl-substituted chlorosilane with potassium followed by FeBr/TMEDA led to the formation of an iron(II) monobromide complex supported by a TMEDA ligand and a carbanion-based ligand containing a six-membered silacycle-bridged biphenyl skeleton. The obtained complex crystallized as a racemic mixture of (, ) and (, ) forms, in which the dihedral angle of the two phenyl rings of the biphenyl moiety was ∼43°.
View Article and Find Full Text PDFChem Commun (Camb)
November 2020
Department of Chemistry, Purdue University, 560 Oval Dr., West Lafayette, IN, USA.
A nickel-catalyzed reductive cyclization of 1,1-dichloroalkenyl silanes is reported. The products of this reaction are unsaturated five- or six-membered silacycles. Intermolecular variants are also described, providing access to trisubstituted vinyl silanes that are not accessible by alkyne hydrosilylation or sila-Heck-type processes.
View Article and Find Full Text PDFBeilstein J Org Chem
March 2020
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasugakoen, Kasuga-shi, Fukuoka 816-8580, Japan.
We have developed a catalytic synthetic method to prepare phenoxasilins. A borane-catalyzed double sila-Friedel-Crafts reaction between amino group-containing diaryl ethers and dihydrosilanes can be used to prepare a variety of phenoxasilin derivatives in good to excellent yields. The optimized reaction conditions were also applicable for diaryl thioethers to afford their corresponding six-membered silacyclic products.
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