14562-09-5Relevant articles and documents
Regio- and diastereoselective stepwise [8 + 3]-cycloaddition reaction between tropone derivatives and donor-acceptor cyclopropanes
Rivero, Alexandra R.,Fernandez, Israel,Sierra, Miguel Angel
, p. 4928 - 4931 (2013)
A novel SnCl4-catalyzed [8 + 3]-cycloaddition reaction between tropone derivatives and donor-acceptor aminocyclopropanes is described. The process leads to the formation of amino-substituted tetrahydrocyclohepta[b] pyrans with complete regio- and diastereoselectivity. Density functional theory calculations suggest that the cycloaddition occurs stepwise through an aromatic zwitterionic intermediate.
Abnormal Nucleophilic Substitution on Methoxytropone Derivatives: Steric Strategy to Synthesize 5-Substituted Azulenes
Kumar, Neha Rani,Agrawal, Abhijeet R.,Zade, Sanjio S.
, p. 14064 - 14071 (2019/11/03)
Azulene is a non-alternant non-benzenoid aromatic system, and in turn, it possesses unusual photophysical properties. Azulene-based conjugated systems have received increasing interest in recent years as optoelectronic materials. Despite the routes availa
Preparation and Palladium-Catalyzed Cross-Coupling of Aryl Triethylammonium Bis(catechol) Silicates with Aryl Triflates
Seganish, W. Michael,DeShong, Philip
, p. 1137 - 1143 (2007/10/03)
Pentavalent aryl and heteroaryl bis(catechol) silicates undergo palladium-catalyzed cross-coupling with aryl and heteroaryl triflates in the presence of a fluoride source in excellent yields. These solid, air-stable bis(catechol) silicates are prepared from a high-yielding displacement reaction between catechol and an aryl siloxane in the presence of an amine base. The cross-coupling reaction is tolerant of a wide range of electron-donating and electron-withdrawing groups. Several examples of di-ortho-substituted triflates are successfully coupled with these reagents.