Results 11 to 20 of about 7,765 (231)

Aziridination of a Single Carbon Atom in Alkenes via Energy Transfer Catalysis. [PDF]

Angew Chem Int Ed Engl
Contrary to traditional alkene aziridination via (formal) nitrene transfer, we herein report a strategy that achieves intermolecular aziridination of a single alkene carbon atom and installs an additional group at the other. Enabled by metal‐free energy transfer (EnT) catalysis, alkenyl boronates and silanes are transformed into reactive intermediates ...
Paulus F, Heusel C, Wessels FH, Sikora B, Niedziella MG, van der Beck K, Daniliuc CG, Glorius F.   +7 more
europepmc   +2 more sources

Recent Developments in Stereoselective Reactions of Sulfonium Ylides

Organics, 2022
This review describes advances in the literature since the mid-1990s in the area of reactions of sulfonium ylide chemistry, with particular attention paid to stereoselective examples.
Mukulesh Mondal, Sophie Connolly, Shi Chen, Shubhanjan Mitra, Nessan J. Kerrigan   +4 more
doaj   +1 more source

Synthetic Applications of Aziridinium Ions

Molecules, 2021
Nonactivated aziridine with an electron-donating group at the ring nitrogen should be activated to an aziridinium ion prior to being converted to cyclic and acyclic nitrogen-containing molecules.
Jala Ranjith, Hyun-Joon Ha
doaj   +1 more source

Copper-catalyzed heterocyclic recombination of aziridine and diazetidine for the synthesis of imidazolidine

, 2023
The discovery of new catalytic applications for metals remains an important goal in organic synthesis. If a catalyst has multiple functions, such as inducing bond cleavage and formation, it can streamline multi-step transformations. Herein, we report the
Satoshi, Matsubara, Daisuke, Tanaka, Kei, Murakami, Hiroki, Kadowaki, Daiki, Higuchi   +4 more
core   +1 more source

Aziridine Carboxylates, Carboxamides and Lactones: New Methods for Their Preparation and Their Transformation into α- and β-Amino Acid Derivatives

Molecules, 2000
The preparation of a variety of novel aziridine-γ-lactones (3) from carbohydrates is described. In contrast to aziridine-2-carboxylates, the lactones react regiospecifically at C-2 with soft nucleophiles to provide optically pure substituted β ...
Robert H. Dodd
doaj   +1 more source

[(2R,3R)-3-(4-Nitrophenyl)aziridin-2-yl]methanol monohydrate

Acta Crystallographica Section E, 2013
The title monohydrate, C9H10N2O3·H2O, contains an aziridine ring including two contiguous stereocenters, both of which exhibit an R configuration. The methylhydroxy and nitrophenyl groups are cis-disposed about the aziridine ring.
V. Gaumet, C. Denis, F. Leal, M. Madesclaire, V.P. Zaitsev   +4 more
doaj   +1 more source

(2S)-2-[(2S*,5R*,6R*)-5,6-Dimethoxy-5,6-dimethyl-1,4-dioxan-2-yl]-1-[(S)-1,1-dimethylethylsulfonyl]aziridine

Acta Crystallographica Section E, 2010
The reaction of a sulfur ylide with a chiral non-racemic sulfinyl imine afforded the desired aziridine in excellent yield and subsequent oxidation of the sulfinyl moiety dissolved in anhydrous dichloromethane using a 75% aqueous solution of 3 ...
David C. Forbes, Sampada V. Bettigeri, William Lewis, Toni Moragas Solà, Robert A. Stockman   +4 more
doaj   +1 more source

Aziridine-Capped Poly(ethylene glycol) Brush Copolymers with Tunable Architecture as Versatile Cross-Linkers for Adhesives

, 2022
Controlling adhesive and cohesive properties in a refined manner is paramount to developing high-performance adhesives. Therefore, developing and implementing cross-linkers have become a major focus in adhesive research, but most conventional cross ...
Chaenyung Cha, Jisu Hong, Min Sang Kwon, Yonghwan Kwon, Jisu Hong (1521565), Chaenyung Cha (1305165), Yonghwan Kwon (7280348), Min Sang Kwon (1359204)   +7 more
core   +1 more source

Efficient synthesis of ethyl 2-(oxazolin-2-yl)alkanoates via ethoxycarbonylketene-induced electrophilic ring expansion of aziridines

Beilstein Journal of Organic Chemistry, 2022
Alkyl 2-diazo-3-oxoalkanoates generate alkoxycarbonylketenes, which undergo an electrophilic ring expansion with aziridines to afford alkyl 2-(oxazolin-2-yl)alkanoates in good to excellent yields under microwave heating.
Yelong Lei, Jiaxi Xu
doaj   +1 more source

Synthesis and Density Functional Theory Studies of Azirinyl and Oxiranyl Functionalized Isoindigo and (3Z,3’Z)-3,3’-(ethane-1,2-diylidene)bis(indolin-2-one) Derivatives

Molecules, 2019
The design and synthesis of functionalized isoindigo compounds by reaction of isoindigo with (S)-glycidyl tosylate, epibromohydrin, 2-(bromomethyl)-1-(arylsulfonyl)aziridine, and 2-(bromomethyl)-1-(alkylsulfonyl)aziridine in the presence of MeONa proceed
Gholamhossein Khalili, Patrick M. McCosker, Timothy Clark, Paul A. Keller   +3 more
doaj   +1 more source