Results 101 to 110 of about 118,878 (273)

High resolution mass spectrometry in molecular structure and stereochemical studies - Effect of stereochemistry on the fragmentation of epimeric derivatives of azabicycloalkanes [PDF]

High resolution mass spectrometry in studies of stereochemistry effect on fragmentation of epimeric derivatives of ...
Burlingame, A. L., Schnoes, H. K., Smith, D. H.   +2 more
core   +1 more source

Chan–Lam Cross‐Coupling With Alkylboron Reagents: From Transmetallation to Radical Pathways

European Journal of Organic Chemistry, EarlyView.
Alkylative Chan–Lam coupling overcomes intrinsic transmetallation limitations of alkylboron reagents by engaging radical pathways. Recent advances reveal how radical and radical–polar crossover mechanisms enable mild C(sp3)—heteroatom bond formation. This minireview highlights key mechanistic insights and emerging strategies that transform alkylboron ...
Nicolas G.‐Simonian, Andrea Serafino, Luc Neuville, Géraldine Masson   +3 more
wiley   +1 more source

A Practical and Flexible De Novo Synthesis of Deoxygenated Carbasugars and Their Cyclitol Epoxides

European Journal of Organic Chemistry, EarlyView.
A de novo synthesis route comprising enantioselective Brown crotylation and ring‐closing metathesis as the key steps enables the synthesis of a‐ and b‐carba‐paratose, a‐ and b‐carba‐colitose as well as four configurational deoxycyclophellitol isosteres.
Yevhenii Radchenko, Nick D. F. Puijmbroeck, Sanne M. Verduin, Jeroen D. C. Codée, Herman S. Overkleeft   +4 more
wiley   +1 more source

Total Synthesis of Novel Oxylipins: Plasmodiophorols A, C, and Epimers

European Journal of Organic Chemistry, EarlyView.
The first total syntheses of plasmodiophorols A and C, recently identified α‐linolenic acid‐derived oxylipins, were achieved from chiral cyclopentafuranone in 12–13 steps. The routes use enzymatic desymmetrization, epimerization, and diastereoselective Grignard addition, providing stereocontrolled access to the natural products and reliable standards ...
Alexandre Guy, Aurélien Lebrun, Thierry Durand, Camille Oger   +3 more
wiley   +1 more source

Porcine Liver Esterase‐Catalyzed Dynamic Kinetic Resolution of a Lactone‐Bridged Biaryl: Impact of Organic Cosolvents on Enantioselectivity

European Journal of Organic Chemistry, EarlyView.
A stereolabile lactone‐bridged biaryl enables dynamic kinetic resolution to provide a conformationally stable ring‐opened biaryl. A significant positive effect of water‐immiscible organic cosolvents on the enantioselectivity in a reaction catalyzed by porcine liver esterase has been discovered for the first time.
Neha Dhiman, Anke Hummel, Kyohei Kanomata, Yoshinari Sawama, Tohru Taniguchi, Harald Gröger, Shuji Akai   +6 more
wiley   +1 more source

Regio- and stereochemical stability induced by anomeric and gauche effects in difluorinated pyrrolidines

Beilstein Journal of Organic Chemistry
Selective fluorination of the pyrrolidine ring in proline motifs has been found to induce significant conformational changes that impact the structure and biological roles of modified peptides and proteins.
Ana Flávia Candida Silva, Francisco A. Martins, Matheus P. Freitas   +2 more
doaj   +1 more source

On-resin N-methylation of cyclic peptides for discovery of orally bioavailable scaffolds. [PDF]

, 2011
Backbone N-methylation is common among peptide natural products and has a substantial impact on both the physical properties and the conformational states of cyclic peptides.
Bauman, Jonathan N, Gelev, Vladimir M, Jacobson, Matthew P, Kalgutkar, Amit S, Leung, Siegfried SF, Linington, Roger G, Liras, Spiros, Lokey, R Scott, Mathiowetz, Alan M, McEwen, Cayla M, Price, David A, Rand, Arthur C, Renzelman, Chad M, Rezai, Taha, Turner, Rushia A, White, Tina R, Zhang, Yizhong   +16 more
core   +1 more source

Raman spectra and Magnetization of all-ferromagnetic superlattices grown on (110) oriented SrTiO3

, 2014
Superlattices consist of two ferromagnets La0.7Sr0.3MnO3(LSMO)and SrRuO3(SRO) were grown in (110)-orientation on SrTiO3(STO) substrates. The x-ray diffraction and Raman spectra of these superlattices show the presence of in-plane compressive strain and ...
Behera, B. C., Padhan, P., Ravindra, A. V., Wilfrid, Prellier   +3 more
core   +3 more sources

Unlocking the Functionalization and Reactivity of Ethylene Bridges in [2.2]Paracyclophanes: Strategies and Challenges

European Journal of Organic Chemistry, EarlyView.
Bridging the gap. Beyond deck functionalization, the ethylene bridges of [2.2]paracyclophanes offer a largely unexploited reactivity landscape. This review showcases strategies to functionalize these bridges and leverage them to build novel cyclophane architectures.
Rongyu Sun, Tamara Ye, Laurent Micouin, Erica Benedetti   +3 more
wiley   +1 more source

Rhenium Complexes as Antimicrobial Agents

Helvetica Chimica Acta, EarlyView.
Rhenium complexes are stepping into the fight against superbugs. Our new review explores how these metallic complexes could inspire the next generation of antimicrobial therapies. ABSTRACT The escalating crisis of antimicrobial resistance (AMR) necessitates the exploration of unconventional therapeutic scaffolds.
Fabio Zobi, Gozde Demirci, Marija Rasic
wiley   +1 more source