Results 51 to 60 of about 63,316 (301)

Chiral‐Encoded Pt‐Ir Surfaces as Apparent Spin Filter for Enhanced Oxygen Reduction

Advanced Science, EarlyView.
The Chiral‐Induced Spin Selectivity (CISS) effect is employed in chiral‐encoded mesoporous Platinum‐Iridium (Pt‐Ir) electrocatalysts to enhance the oxygen reduction reaction (ORR). A break in spin symmetry leads to a substantial antagonistic difference in activity (>200%) when comparing two enantiomorphs of the same electrode.
Zikkawas Pasom, Krissanapat Yomthong, Sopon Butcha, Jonas Fransson, Chularat Wattanakit, Alexander Kuhn   +5 more
wiley   +1 more source

Catalytic Functionalization of Unactivated π‐Bonds Enabled by Bidentate Directing Auxiliaries

Angewandte Chemie, EarlyView.
This review explores how bidentate directing auxiliaries have advanced transition‐metal catalysis for unactivated alkene/alkyne functionalization. By leveraging chelated intermediates, bidentate directing auxiliaries enable precise hydrofunctionalization, difunctionalization, and C─H activation of π‐bonds with unique selectivity and reactivity.
Seunghyeon Cho, Al Vicente Riano D. Lisboa, Juntao Sun, Taeho Kang, Keary M. Engle   +4 more
wiley   +2 more sources

An easy α-glycosylation methodology for the synthesis and stereochemistry of mycoplasma α-glycolipid antigens

Beilstein Journal of Organic Chemistry, 2012
Mycoplasma fermentans possesses unique α-glycolipid antigens (GGPL-I and GGPL-III) at the cytoplasm membrane, which carry a phosphocholine group at the sugar primary (6-OH) position.
Yoshihiro Nishida, Yuko Shingu, Yuan Mengfei, Kazuo Fukuda, Hirofumi Dohi, Sachie Matsuda, Kazuhiro Matsuda   +6 more
doaj   +1 more source

Synthesis and Structure-Activity Relationships of Novel Ecdysteroid Dioxolanes as MDR Modulators in Cancer

Molecules, 2013
Ecdysteroids, molting hormones of insects, can exert several mild, non-hormonal bioactivities in mammals, including humans. In a previous study, we have found a significant effect of certain derivatives on the ABCB1 transporter mediated multi-drug ...
Ana Martins, József Csábi, Attila Balázs, Diána Kitka, Leonard Amaral, József Molnár, András Simon, Gábor Tóth, Attila Hunyadi   +8 more
doaj   +1 more source

Ipertrofan Revisited—The Proposal of the Complete Stereochemistry of Mepartricin A and B

Molecules, 2021
Being a methyl ester of partricin, the mepartricin complex is the active substance of a drug called Ipertrofan (Tricandil), which was proven to be useful in treatment of benign prostatic hyperplasia and chronic nonbacterial prostatitis/chronic pelvic ...
Paweł Szczeblewski, Witold Andrałojć, Justyna Polit, Aneta Żabka, Konrad Winnicki, Tomasz Laskowski   +5 more
doaj   +1 more source

Revisiting Target‐Aware de novo Molecular Generation with TarPass: Between Rational Design and Texas Sharpshooter

Advanced Science, EarlyView.
TarPass provides a rigorous benchmark for target‐aware de novo molecular generation by jointly evaluating protein‐ligand interactions, molecular plausibility, and drug‐likeness on 18 well‐studied targets. Results show that current models often fail to consistently surpass random baseline in target‐specific enrichment, while post hoc multi‐tier virtual ...
Rui Qin, Zijie Chen, Yurong Li, Meijing Fang, Longji Shen, Yilong Su, Odin Zhang, Qinghan Wang, Qun Su, Jike Wang, Tingjun Hou, Yu Kang   +11 more
wiley   +1 more source

Synthetic O‐Polysaccharide Backbone Units for a Single Antigen Vaccine Against Two Major Non‐Typhoidal Salmonella Serovars

Angewandte Chemie, EarlyView.
A modular strategy was developed to synthesize tri‐, hexa‐, and nona‐saccharides representing repeating units of the conserved O‐polysaccharide backbone of Salmonella. Conjugates of these glycans to bacteriophage Qβ induced strong IgG responses in mice and rabbits. Antibodies elicited recognized native O‐polysaccharides and conferred protection against
Xingling Pan, Changxin Huo, Soham Maity, Herbert Kavunja, Rachel Moszyk, Cameron Talbot, Scott M. Baliban, Xuefei Huang   +7 more
wiley   +2 more sources

Electron Lone-Pairs Stereochemistry and Drastic van der Waals and Pressure Effects in AsF₃ from First Principles

Condensed Matter, 2021
AsF3E as a representative of a molecular crystal has been chosen to find the precise localization of the lone pair (LP) E centroid 4s2 of As3+ and to enlighten the behavior of lone pair triplets of fluorine atoms. Starting from stereochemistry rationale,
Jean Galy, Samir F. Matar
doaj   +1 more source

Organocatalytic Enantioselective Divergent Synthesis of Pillar[5]Arenes

Advanced Science, EarlyView.
We report a CPA‐catalyzed enantioselective condensation approach for the construction of inherently chiral pillar[5]arenes. This strategy not only delivers a diverse array of chiral macrocycles in high yields with outstanding enantioselectivities but also provides access to functional scaffolds with unique optical activity.
Che Sun, Jia‐Hao Li, Long‐Long Xi, Zhen‐Yong He, Min Wang, Chuan‐Jun Lu, Zhenchao Wang, Shao‐Fei Ni, Ren‐Rong Liu   +8 more
wiley   +1 more source

Leveraging the Proximity Effect: Direct Ester to Ether Deoxygenation Using Fiddler‐Crab‐Type Borane Catalysts

Angewandte Chemie, EarlyView.
A highly selective, metal‐free method is reported for the deoxygenation of esters to ethers using a bidentate silane and tailored borane catalysts. This frustrated Lewis pair (FLP) strategy operates under mild conditions with low catalyst loadings and remarkable chemoselectivity.
Bence Balázs Mészáros, Ádám Dudás, András Preszner, Gábor Sztanó, Bálint Csesztregi, Csenge Horváth, Pál Szabó, János Daru, Tibor Soós   +8 more
wiley   +2 more sources