multicomponent reaction that generates functionalized 1,4-dicarbonyl motifs via formal hydrocarbonylation of activated alkynes with propargylamines and water under metal-free conditions. This novel synthesis method utilizes propargylamines and water as carbonyl and proton precursors in which propargylamines are activated in situ by alkynes for α-C(sp3)–H activation and C–N bond cleavage. This method
A novel approach for the synthesis of C<sub>60</sub> fullerenes containing strained 2,3-dimethylenebicyclo[2,2,0]hexane fragments
作者:Airat R. Tuktarov、Nuri M. Chobanov、Ilfir R. Ramazanov、Arthur R. Tulyabaev、Arslan R. Akhmetov、Dim I. Galimov、Usein M. Dzhemilev
DOI:10.1039/d0nj05465h
日期:——
The present article details a novel approach for introducing strained 2,3-dimethylenebicyclo[2,2,0]hexane structures into the C60 fullerene molecule, based on the reaction of C60 with substituted propargylamines, promoted by the Ti(Oi-Pr)4 and EtMgBr system. The theoretical LUMO energies of the strained C60 derivatives calculated at the PBEPBE/6-311G(d,p) level of theory are from −3.93 to −4.09 eV
Catalyst-free activation of methylene chloride and alkynes by amines in a three-component coupling reaction to synthesize propargylamines
作者:Vikas S. Rawat、Thulasiram Bathini、S. Govardan、Bojja Sreedhar
DOI:10.1039/c4ob00986j
日期:——
Propargylamines are synthesized via metal-free activation of the C–halogen bond of dihalomethanes and the C–H bond of terminal alkynes in a three-componentcoupling without catalyst or additional base and under mild reaction conditions. The dihalomethanes are used both as solvents as well as precursors for the methylene fragment (C1) in the final product. The scope of the reaction and the influence