Results 11 to 20 of about 5,651 (185)
Frontiers in Chemistry, 2020 A chemo- and diastereo-selective (3 + 2) cycloaddition reacition between Donor-Acceptor (D-A) cyclopropanes and α,β-unsaturated enamides is developed for efficient access to spiro(cyclopentane-1,3'-indoline) derivatives.
Xun Zhu +5 more
doaj +1 more source
Molecules, 2014 The compounds [3-(2-Bromocyclohex-2-enyloxy)prop-1-ynyl]-tert-butyl-dimethylsilane 3, [4-(2-bromocyclohex-2-en-1-yloxy)but-2-yn-1-yloxy]tert-butyldimethylsilane 5 and dimethyl 2-(2-bromocyclohex-2-enyl)-2-(3-(tert-butyldimethylsilanyl)prop-2-ynyl ...
Aydin Demircan
doaj +1 more source
Photoredox-catalyzed oxo-amination of aryl cyclopropanes
Nature Communications, 2019 The ring-opening and functionalization of electronically unbiased cyclopropanes is highly challenging to achieve in a regioselective fashion. Here, the authors report a mild photoredox-coupled oxoamination of electronically unactivated aryl cyclopropanes
Liang Ge +5 more
doaj +1 more source
Molecules, 2022 Enantiomerically enriched cyclopropyl ethers, amines, and cyclopropylazole derivatives possessing three stereogenic carbon atoms in a small cycle are obtained via the diastereoselective, formal nucleophilic substitution of chiral, non-racemic ...
Hillary Straub +3 more
doaj +1 more source
Copper, Boron and Vinyl Epoxides: from 1,4-Diols to Cyclopropylboronates
CHIMIA, 2020 Herein we describe the reactivity found between vinyl epoxides and catalytically generated copper-boryl complexes. By tuning the substituents of the alkene and/or the reaction conditions, 1,4-diols, allylic alcohols or cyclopropylboronates can be ...
Luis Novoa +3 more
doaj +1 more source
Molecules, 2021 This work focuses on the search and development of drugs that may become new alternatives to the commercial drugs currently available for treatment of leishmaniasis. We have designed and synthesized 12 derivatives of bis(spiropyrazolone)cyclopropanes. We
Olalla Barreiro-Costa +11 more
doaj +1 more source
Olefin Cyclopropanations via Sequential Atom Transfer Radical Addition-Dechlorination Reactions
CHIMIA, 2010 In organic synthesis, cyclopropanation reactions are often performed with Simmons–Smith-type reagents or by transition metal catalyzed reactions of olefins with diazo compounds.
Katrin Thommes, Kay Severin
doaj +1 more source
Angewandte Chemie, EarlyView.The thiocarbenium ion rearrangement of 3‐dihydrodisorhabdin B greatly increases the recovery of aleutianamine from Latrunculia spp., a pyrroloiminoquinone natural product with potent activity against drug‐resistant cancers, collected from the deep‐ocean along the Aleutian Islands.
Cody F. Dickinson +13 more
wiley +2 more sources
Beilstein Journal of Organic Chemistry, 2020 Ferrocenyl thioketones reacted with donor–acceptor cyclopropanes in dichloromethane at room temperature in the presence of catalytic amounts of Sc(OTf)3 yielding tetrahydrothiophene derivatives, products of formal [3 + 2]-cycloaddition reactions, in ...
Grzegorz Mlostoń +4 more
doaj +1 more source
Beilstein Journal of Organic Chemistry, 2019 Cyclopropenes constitute useful precursors of other classes of compounds incorporating a three-membered ring. Although the transformation of substituted cyclopropenes into alkylidenecyclopropanes can be accomplished through different strategies, this ...
Guillaume Ernouf +3 more
doaj +1 more source