Results 121 to 130 of about 28,372 (298)

Homohalocyclization: Electrophilic Bromine-Induced Cyclizations of Cyclopropanes

open access: yes, 2016
An efficient method for the halocyclization of cyclopropanes has been developed. The cyclopropanes undergo a 1,3-addition reaction to form homohalocyclization products compared to conventional alkene halocyclizations.
Christian Rösner (1668952)   +1 more
core   +1 more source

Boronic Acid Inhibitors of β‐Lactamases: A Promising Strategy Against Antimicrobial Resistance

open access: yesMedicinal Research Reviews, EarlyView.
ABSTRACT The rise of antimicrobial resistance (AMR) poses a critical threat to global health, mostly due to the proliferation of β‐lactamases, a class of enzymes responsible for the inactivation of β‐lactam antibiotics. Among the most promising strategies to restore β‐lactam efficacy is the use of β‐lactamase inhibitors (BLIs), with boronic acid ...
Nicolò Santi   +4 more
wiley   +1 more source

Cyclopropane: a vindication.

open access: yesSouth African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde, 2003
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openaire   +2 more sources

Synthesis of 1-aryl-2-vinyl cyclopropanes by intramolecular carbolithiation

open access: yes, 1997
Benzylselenides bearing a γ-alkenyl-ε-sulfonyloxy side chain react with butyllithiums to produce, via the corresponding benzyllithiums, 1-aryl-2-vinyl ...
François Couty   +3 more
core   +1 more source

Main‐chain polyfullerenes: Taking fullerene to the next dimension

open access: yesPolymer International, EarlyView.
This short review appraises main‐chain polyfullerenes. Their slow development over 30 years has suddenly boomed with a rapid growth due to exciting developments in solar energy. Abstract This mini‐review gives an overview of the development, chemistry, properties and applications of main‐chain polyfullerenes.
Marco Antônio GB Gomes   +4 more
wiley   +1 more source

The continuing significance of chiral agrochemicals

open access: yesPest Management Science, Volume 81, Issue 4, Page 1697-1716, April 2025.
In the time frame 2018–2023, around 43% of the 35 chiral agrochemicals introduced to the market (herbicides, fungicides, insecticides, acaricides, and nematicides) contain one or more stereogenic centers in the molecule, and almost 69% of them have been marketed as racemic mixtures of enantiomers or stereoisomers.
Peter Jeschke
wiley   +1 more source

Five Decades of Dispute: A Triptych. Roald Hoffmann

open access: yesThe Chemical Record, EarlyView.
This article examines the historical Corey–Woodward controversy through Roald Hoffmann's personal perspective, completing a triptych on the prolonged dispute. Drawing on archival records, contemporaneous correspondence, and extensive interviews, it reconstructs Hoffmann's interactions with Corey and Woodward from the 1960s onward.
Jeffrey I. Seeman
wiley   +1 more source

Ring‐Retentive Allylation of Cyclopropanols Through Interception of Enolized Homoenolates by π‐Allylpalladium

open access: yesAngewandte Chemie, Volume 138, Issue 44, 26 October 2026.
Cyclopropanols undergo palladium‐catalyzed, zinc‐mediated allylation with allyl acetates: the ring opens transiently to an enolized homoenolate, is intercepted by π‐allylpalladium, and recloses to furnish β‐allylated cyclopropanols. This formal “allylic cyclopropylation” broadens the reaction space for ring‐retentive functionalization of cyclopropanols.
Kento Tsukiji   +2 more
wiley   +2 more sources

OPTICALLY ACTIVE CHRYSANTHEMIC ACID AND ITS ANALOGUES [PDF]

open access: yesChemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2010
Optically active chrysanthemic acid and its analogues have received considerable attention in recent years due to their practical importance. This review will focus on describing the developments in the synthesis of optically active chrysanthemic acid ...
L. Bets   +5 more
doaj  

Nucleophilic Ring Opening of Donor–Acceptor Cyclopropanes with the Cyanate Ion: Access to Spiro[pyrrolidone-3,3′-oxindoles]

open access: yes, 2018
The nucleophilic ring opening of donor–acceptor cyclopropanes with the cyanate ion is reported for the first time. Cyclopropanes, spiro-activated with oxindole fragments as acceptors, are shown to undergo transformations into biologically relevant spiro­[
Dmitry A. Skvortsov (1773577)   +5 more
core   +1 more source

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