Results 21 to 30 of about 19,882 (280)

Synthesis of cyclopropanes via organoiron methodology: stereoselective preparation of cis-2-(2’-carboxycyclopropyl)glycine [PDF]

, 2002
A stereoselective route to cis-2-(2′-carboxycyclopropyl)glycine has been developed. exo-Nucleophilic addition to the (bicyclo[5.1.0]octadienyl)iron(1+) cation establishes the relative stereochemistry at the cyclopropane ring and the α-stereocenter ...
Donaldson, William, Wallock, Nathaniel J
core   +2 more sources

Ferrocenyl-substituted tetrahydrothiophenes via formal [3 + 2]-cycloaddition reactions of ferrocenyl thioketones with donor–acceptor cyclopropanes

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, Mateusz Kowalczyk, André U. Augustin, Peter G. Jones, Daniel B. Werz   +4 more
doaj   +1 more source

Preparation of Chiral Enantioenriched Densely Substituted Cyclopropyl Azoles, Amines, and Ethers via Formal S_N2′ Substitution of Bromocylopropanes

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, Pavel Ryabchuk, Marina Rubina, Michael Rubin   +3 more
doaj   +1 more source

Spectral Data for Synthesis of Cyclopropanes via Organoiron Methodology: Stereoselective Preparation of Bi(cyclopropyl)s [PDF]

, 2007
Spectral data created in the course of the research project. Supports specific findings in Synthesis of Cyclopropanes via Organoiron Methodology: Stereoselective Preparation of Bi(cyclopropyl)s .
Chatterjee, de Meijere, Doubleday, Doubleday, Doubleday, Falck, Julia, Kao, Kasdorf, Lebel, Lukesh, Monpert, Monpert, Monpert, Monpert, Monpert, Ohno, Pietruszka, Pietruszka, Taylor, Theberge, von Seebach, Wallock, Wallock, Wang, Wilkinson, Yoshida, Yun   +27 more
core   +2 more sources

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

Synthetic Applications and Methodological Developments of Donor-Acceptor Cyclopropanes and Related Compounds [PDF]

, 2016
Donor-acceptor cyclopropanes are convenient precursors to reactive and versatile 1,3-dipoles, and have found application in the synthesis of a variety of carbo- and heterocyclic scaffolds.
O'Connor, Nicholas R., Stoltz, Brian M., Wood, John L.   +2 more
core   +1 more source

Sigmatropic rearrangements of cyclopropenylcarbinol derivatives. Access to diversely substituted alkylidenecyclopropanes

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, Jean-Louis Brayer, Christophe Meyer, Janine Cossy   +3 more
doaj   +1 more source

Synthesis and reactions of donor cyclopropanes: efficient routes to cis- and trans-tetrahydrofurans [PDF]

, 2015
A detailed study on the synthesis and reactions of silylmethylcyclopropanes is reported. In their simplest form, these donor-only cyclopropanes undergo Lewis acid promoted reaction to give either cis- or trans-tetrahydrofurans, with the selectivity being
Adrian P. Dobbs, Affo, Alali, Barbero, Bermejo, Calter, Campbell, Cavitt, Chio, Colin, Coulson, Dobbs, Dobbs, Dobbs, Dobbs, Dobbs, Dobbs, Dobbs, Dunn, Fleming, Fleming, Fuchibe, Grover, Hattori, Jonathan Dunn, Jones, Karadeoltan, Knolker, Kojima, Lewis, Li, Liaw, Mironov, Muchowski, Pohlhaus, Pornet, Rawson, Reddy, Reissig, Reissig, Salvador, Salvador, Schneider, Soderquist, Spurr, Tang, Witiak, Yu, Zeng   +48 more
core   +1 more source

Activated Cyclopropanes: A Remarkable Breadth of Recent Chemistry [PDF]

, 2014
The reactions of cyclopropanes activated by electron-withdrawing groups and electron-donating groups – donor–acceptor (DA) cyclopropanes – and with alkenyl or alkylidene substituents has been an area of recent intense research activity.
Green, James R, Snieckus, Victor
core   +2 more sources

Organocatalytic activation of cyclopropanes in asymmetric synthesis

Tetrahedron Chem, 2023
Cyclopropanes are strained carbocycles that can undergo ring opening reactions in which one of the C–C bond present in the cycle is broken following a radical or ionic mechanism.
Efraím Reyes, Uxue Uria, Liher Prieto, Luisa Carrillo, Jose L. Vicario   +4 more
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