34825-70-2Relevant articles and documents
Immobilization of a non-heme diiron complex encapsulated in an ammonium-type ionic liquid layer modified on an Au electrode: Reactivity of the electrode for O2 reduction
Kitagawa, Tatsuya,Nishino, Junpei,Inomata, Tomohiko,Ozawa, Tomohiro,Funahashi, Yasuhiro,Masuda, Hideki
, p. 4780 - 4783 (2016)
An unstable diiron(ii,ii) complex possessing O2 binding ability at low temperature was encapsulated and stabilized in an ammonium-type ionic liquid layer polymerized on an electrode. The encapsulated complex revealed catalytic reactivity for four-electron reduction of O2 at an ambient temperature in aqueous solution.
Dual Role of Vinyl Sulfonamides as N-Nucleophiles and Michael Acceptors in the Enantioselective Synthesis of Bicyclic δ-Sultams
Mulet, Cristina,Escolano, Marcos,Llopis, Sebastián,Sanz, Sergio,Ramírez de Arellano, Carmen,Sánchez-Roselló, María,Fustero, Santos,del Pozo, Carlos
supporting information, p. 2885 - 2893 (2018/08/17)
A new methodology for the synthesis of enantiomerically enriched bicyclic δ-sultams is described, involving an initial organocatalytic intramolecular aza-Michael reaction of vinyl sulfonamides bearing a conjugated ketone at a remote position. The resulting Michael adducts were then subjected to an intramolecular conjugate addition over the vinyl sulfone moiety, thus rendering the final bicyclic sultams containing two stereocenters. The key point of this strategy relies on the use of vinyl sulfonamides as both, nitrogen nucleophiles and Michael acceptors. The use of phosphazene-derived bases avoided the racemization of the intermediate derivatives, rendering 6-membered ring bicyclic δ-sultams in enantiomerically enriched manner with a small erosion of enantiopurity. Anyway, after recrystallization, final sultams were obtained in almost enantiomerically pure form. Nevertheless, the enantioselective synthesis of either 5-membered ring products or benzofused derivatives was found to be out of the scope of our strategy. (Figure presented.).
Palladium-Catalyzed Aerobic Oxidative Cyclization of Aliphatic Alkenyl Amides for the Construction of Pyrrolizidine and Indolizidine Derivatives
Lo, Kai-Yip,Ye, Liu,Yang, Dan
supporting information, p. 1570 - 1575 (2017/08/11)
An efficient palladium-catalyzed aerobic oxidative cyclization has been developed to synthesize a variety of pyrrolizidine and indolizidine derivatives from simple aliphatic alkenyl amides in moderate to good yields. The reaction features the capability of accessing various N-heterocycles and the use of molecular oxygen (1 atm) as the green oxidant.