Results 71 to 80 of about 28,372 (298)
, 2016 Lithiated 2-(1-chloroethyl)-4,4-dimethyl-2-oxazoline 7 adds to electron-poor alkenyl heterocycles to afford substituted cyclopropanes in excellent yields.
Vito Capriati (1891783) +4 more
core +2 more sources
Access to cyclopropanes with geminal trifluoromethyl and difluoromethylphosphonate groups
Beilstein Journal of Organic Chemistry, 2023 A synthetic route to the bench-stable fluorinated masked carbene reagent diethyl 2-diazo-1,1,3,3,3-pentafluoropropylphosphonate, bearing a trifluoromethyl and a difluoromethyl group is reported for the first time.
Ita Hajdin +5 more
doaj +1 more source
σ-Bond Hydroboration of Cyclopropanes.
Journal of the American Chemical Society, 2020 Hydroboration of alkenes is a classical reaction in organic synthesis in which alkenes react with boranes to give alkylboranes with subsequent oxidation resulting in alcohols.
H. Kondo +8 more
semanticscholar +1 more source
Photochemical preparation of cyclopropanes from cyclobutanones
, 2001 A general method for the preparation of cyclopropanes is reported. Triplet-photosensitized reactions of a series of cyclobutanones give cyclopropanes as the major product.
Edward Lee-Ruff, Jailall Ramnauth
core +1 more source
Transforming cyclopropanes to enamides via σ-C–C bond eliminative borylation
Nature CommunicationsRecent strides in C–H borylation have significantly expanded our toolkit for the preparation of organoboronates. Nevertheless, avenues alternative to obtain these compounds via σ-C–C cleavage, thereby facilitating molecular scaffold editing, remain ...
Shuyu Kang +5 more
doaj +1 more source
Angewandte Chemie, 2018 Herein, we describe the development of a photoredox‐catalyzed decarboxylative radical addition–polar cyclization cascade approach to functionalized cyclopropanes.
Chao Shu +4 more
semanticscholar +1 more source
Angewandte Chemie, EarlyView.Ein Biosynthese‐Gencluster aus Streptomyces sp. YIM 121038 wurde untersucht, wobei die Produktion des Sesterterpens Tibonen A und seines Oxidationsprodukts Tibonon nachgewiesen wurde. Der Cyclisierungsmechanismus zu Tibonen A wurde mittels Isotopenmarkierungsexperimenten, DFT‐Berechnungen und Eingriffen in die Enzym‐Substrat‐Wechselwirkung durch ...
Min Wang +6 more
wiley +1 more source
Recent Advances in the Chemistry of Doubly Activated Cyclopropanes: Synthesis and Reactivity
, 2019 Diactivated cyclopropanes containing two geminal electron withdrawing groups, commonly called as `Doubly Activated Cyclopropanes' are useful synthons for the synthesis of many interesting natural products and functionalized molecules.
Gopinath, Purushothaman +1 more
core +1 more source
Reversal of Regioselectivity in Reactions of Donor-Acceptor Cyclopropanes with Eelectrophilic Olefins [PDF]
, 2021 Cyclopropanes bearing donor and acceptor groups at the opposite ends of the C-C bond should react with both nucleophiles and electrophiles. Their reactivity towards nucleophiles is well explored while only few specific electrophilic reagents give desired
Jakub, Durka +3 more
core +2 more sources
Dirhodium(II)-catalyzed [3 + 2] cycloaddition of N-arylaminocyclopropane with alkyne derivatives
Beilstein Journal of Organic Chemistry, 2019 Dirhodium(II) complex-catalyzed [3 + 2] reactions between N-arylaminocyclopropanes and alkyne derivatives are described. The cycloaddition products proved to be versatile synthetic intermediates.
Wentong Liu +4 more
doaj +1 more source