Results 121 to 130 of about 19,839 (247)

Regulation of membrane protein activity by cyclopropane fatty acids in Escherichia coli lipid environment

Communications Biology
Membrane proteins are crucial in cellular processes like signal and energy transduction and are influenced by the properties of the surrounding lipid bilayer.
Kazumasa Hori, Shin Hamamoto, Keiko Shinoda, Kazuhiro Nakamura, Ryo Iwama, Tetsuro Ujihara, Saori Kosono, Makoto Nishiyama, Hisashi Kawasaki, Takeo Tomita   +9 more
doaj   +1 more source

A de‐novo Approach Towards Divergent [3+2π/σ] Photocycloadditions of Nitrones via Assembly‐Controlled Kinetic Electron Transfer Gating

Angewandte Chemie, Volume 138, Issue 43, 19 October 2026.
A metal‐free photocatalytic platform converts nitrones into 4‐isoxazolines and oxa–aza–bicycloheptanes through divergent [3+2π/σ] cycloadditions. Assembly‐controlled kinetic electron transfer gating dictates substrate activation, enabling selective reactivity beyond thermodynamic expectations.
Nayan Saha, Rajesh Kancherla, Jorge Escorihuela, Shana Chandran, Mrinal K. Bera, Magnus Rueping, Burkhard König   +6 more
wiley   +2 more sources

New Strategies for Intramolecular Annulations: Intramolecular Additions of Silyloxycyclopropane-Derived Anions; Application to Hydrindenone Syntheses

Journal of the Brazilian Chemical Society, 1998
As an extension to our work on intramolecular annulations via silyloxycyclopropane derived anions, we have investigated the chemistry of cyclopentyl cyclopropane systems, 6-9, in an effort to prepare stereospecifically functionalized hydrindenones.
Marino J.P., Stengel Peter J., Simonelli Fabio, Ferreira J. Tércio B.   +3 more
doaj  

Cyclopropane Compatibility with Oxidative Carbocation Formation: Total Synthesis of Clavosolide A

, 2016
Cyclopropane-substituted allylic ethers react with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone to form oxocarbenium ions with no competitive ring cleavage. This reaction can be used for the preparation of cyclopropane-substituted tetrahydropyrans.
Paul E. Floreancig (1555075), GuangRong Peh (1555072)   +1 more
core   +1 more source

Dirhodium‐Catalyzed Enantioselective Synthesis of Difluoromethylated Cyclopropanes via Enyne Cycloisomerization

Advanced Science
(Difluoromethylated cyclopropane represents an important motif, which is widely found in bioactive and functional molecules. Despite significant progress in modern chemistry, the atom‐economic and enantioselective synthesis of difluoromethylated ...
Chuntao Wang, Dong Zhu, Rui Wu, Shifa Zhu   +3 more
doaj   +1 more source

Lipid membrane remodeling and metabolic response during isobutanol and ethanol exposure in Zymomonas mobilis

Biotechnology for Biofuels and Bioproducts
Background Recent engineering efforts have targeted the ethanologenic bacterium Zymomonas mobilis for isobutanol production. However, significant hurdles remain due this organism’s vulnerability to isobutanol toxicity, adversely affecting its growth and ...
Julio Rivera Vazquez, Edna Trujillo, Jonathan Williams, Fukang She, Fitsum Getahun, Melanie M. Callaghan, Joshua J. Coon, Daniel Amador-Noguez   +7 more
doaj   +1 more source

The Mechanism of Visible‐Light Photochemical Rearrangements of Conjugated Amide Enolates

Chemistry – A European Journal, Volume 32, Issue 39, 22 October 2026.
Visible light irradiation of extended enolates of N‐benzylamides leads to homolytic C─N Bond cleavage, generating a biradical. Computational and mechanistic studies suggest rapid radical recombination within a solvent cage to give either ring‐expanded or rearranged products. ABSTRACT Deprotonation of conjugated amides forms colored solutions of lithium
James Mortimer, William Terry‐Wright, Basile F. E. Curchod, Jonathan Clayden   +3 more
wiley   +1 more source

EXPERIMENTAL STUDY ON PREVENTION AGAINST EXPLOSION OF ANESTHETIC GAS (ETHER AND CYCLOPROPANE) PART I. ON THE DETERMINATION OF THE CONCENTRATION OF ETHER GAS AND CYCLOPROPANE [PDF]

, 1957
The determination of the concentration of inflammable anesthetic gases is the most important for the precaution against ignition. A simple method using an interferometer and detector has been found by author for the determination of the concentration of ...
Sakashita, Noboru
core  

FeIII‐Mediated Synthesis of Azaspirodienones via Ipso‐Radical Cyclization of Ugi–4CR Adducts

European Journal of Organic Chemistry, Volume 29, Issue 39, 22 October 2026.
An efficient two‐step protocol for the synthesis of azaspirodienones via Fe‐mediated ipso‐radical cyclization of Ugi adducts has been developed. This methodology provides rapid access to these privileged spirocyclic architectures under mild conditions, offering a practical and versatile approach to generating structurally complex molecules with ...
Silvia J. Becerra–Anaya, Valeria Morales–Hernández, Luis A. Polindara–García   +2 more
wiley   +1 more source

Deprotonation and Alkylation of Weakly Acidic C(sp3)─H Bonds Through In Situ Generation of a Strong Hydride Base From 1,1,3,3‐Tetramethyldisiloxane and Potassium tert‐Butoxide

Angewandte Chemie, Volume 138, Issue 42, 12 October 2026.
The use of 1,1,3,3‐tetramethyldisiloxane (TMDSO) and potassium tert‐butoxide enables direct alkylation of weakly acidic carbon–hydrogen bonds with alkyl halides. Experimental and computational studies support the formation of a substrate‐associated hydride‐like base, providing a single‐step alternative to the classical deprotonation and electrophile ...
Piers St. Onge, Brandon White, Han Yao, Travis Dudding, Stephen G. Newman   +4 more
wiley   +2 more sources