42797-82-0Relevant academic research and scientific papers
Silver(I) Oxide-/DBU-Promoted Synthesis of Dihydrofuran Units through Allenyl Silver Formation
Allievi, Luca,Ciofini, Ilaria,Dhambri, Sabrina,Lannou, Marie-Isabelle,Perfetto, Anna,Rager, Marie-Noelle,Selkti, Mohamed,Sorin, Geoffroy,Yu, Bao
, p. 17455 - 17461 (2020)
A formal [3+2] cyclization mediated by silver(I) oxide and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) is described herein. Through a broad variety of carbonyl compounds, this system can promote cyclization reactions with high yield (up to 85 %) and diastereoselectivity (up to 95:5) for a straightforward access to complex and congested dihydrofuran derivatives in one step under mild conditions. Based on DFT studies, the proposed mechanism would involve an allenyl silver intermediate.
Preparation of 5-membered rings via radical addition-translocation- cyclization (RATC) processes mediated by diethyl thiophosphites
Lamarque, Christophe,Beaufils, Florent,Denes, Fabrice,Schenk, Kurt,Renaud, Philippe
supporting information; experimental part, p. 1353 - 1358 (2011/06/26)
A practical method for the formation of thiophosphonates bearing functionalized monocyclic, fused bicyclic and spirocyclic residues is presented. The procedure requires the easily available terminal alkynes as starting materials as well as commercially an
Construction of methylenecycloheptane frameworks through 7-exo-dig cyclization of acetylenic silyl enol ethers catalyzed by triethynylphosphine- gold complex
Ito, Hideto,Ohmiya, Hirohisa,Sawamura, Masaya
supporting information; experimental part, p. 4380 - 4383 (2010/11/17)
Figure Presented. A cationic gold(I) complex bearing a semihollow-shaped triethynylphosphine ligand efficiently catalyzed the 7-exo-dig cyclization of silyl enol ethers with an ω-alkynic substituent. The reaction gave various methylenecycloheptane derivatives with an exo- or endocyclic carbonyl group. The protocol was applicable not only to cyclic substrates that form bicyclic frameworks but also to acyclic ones with or without substituents in a carbon chain tether.
