Results 51 to 60 of about 17,400 (243)

Amine and Titanium (IV) Chloride, Boron (III) Chloride or Zirconium (IV) Chloride-Promoted Baylis-Hillman Reactions

Molecules, 2001
The Baylis-Hillman reactions of various aryl aldehydes with methyl vinyl ketone at temperatures below -20oC using Lewis acids such as titanium (IV) chloride, boron (III) chloride or zirconium (IV) chloride in the presence of a catalytic amount of ...
Shi-Cong Cui, Jian-Kang Jiang, Min Shi
doaj   +1 more source

Expression and characterization of PrnC—a flavin-dependent halogenase from the pyrrolnitrin biosynthetic pathway of Pseudomonas protegens Pf-5

Frontiers in Catalysis, 2023
Introduction: The antimicrobial pyrrolnitrin from Pseudomonas strains is formed in four steps from tryptophan and comprises two flavin-dependent halogenases.
Jan Gebauer, Jörg Pietruszka, Jörg Pietruszka, Thomas Classen   +3 more
doaj   +1 more source

Materials and Device Engineering Perspective: Recent Advances in Organic Photovoltaics

Advanced Materials, EarlyView.
This review article provides a comprehensive overview of recent advances in organic photovoltaics (OPVs), covering key aspects such as material development, morphology control, stability challenges, and emerging applications—including semitransparent OPVs.
Ying Zhang, Hao Xia, Jiangsheng Yu, Yang Yang, Gang Li   +4 more
wiley   +1 more source

Participation of the Halogens in Photochemical Reactions in Natural and Treated Waters

Molecules, 2017
Halide ions are ubiquitous in natural waters and wastewaters. Halogens play an important and complex role in environmental photochemical processes and in reactions taking place during photochemical water treatment.
Yi Yang, Joseph J. Pignatello
doaj   +1 more source

Synthesis and Antimalarial Evaluation of Halogenated Analogues of Thiaplakortone A

Marine Drugs, 2023
The incorporation of bromine, iodine or fluorine into the tricyclic core structure of thiaplakortone A (1), a potent antimalarial marine natural product, is reported.
Folake A. Egbewande, Brett D. Schwartz, Sandra Duffy, Vicky M. Avery, Rohan A. Davis   +4 more
doaj   +1 more source

Recent Progress in Organic TADF Emitters Containing Heavy Atoms

Advanced Optical Materials, EarlyView.
In this review, progress on heavy atom use in organic TADF emitters to produce internal and external heavy atom effects is summarized. Impacts on molecular geometry, TADF efficiency, and performance in OLEDs are discussed. An outlook on the challenges and opportunities of heavy atom incorporation is provided.
Seja A. Elgadi, Sydney Mikulin, Zachary M. Hudson   +2 more
wiley   +1 more source

Site-selective chlorination of pyrrolic heterocycles by flavin dependent enzyme PrnC

Communications Chemistry
Halogenation of pyrrole requires strong electrophilic reagents and often leads to undesired polyhalogenated products. Biocatalytic halogenation is a highly attractive approach given its chemoselectivity and benign reaction conditions.
GuangRong Peh, Terence Tay, Lee Ling Tan, Elaine Tiong, Jiawu Bi, Yi Ling Goh, Suming Ye, Fu Lin, Cheryl Jia Xin Tan, Yong Zi Tan, Joel Wong, Huimin Zhao, Fong Tian Wong, Ee Lui Ang, Yee Hwee Lim   +14 more
doaj   +1 more source

A Window into the Workings of anti-B₁₈H₂₂ Luminescence—Blue-Fluorescent Isomeric Pair 3,3′-Cl₂-B₁₈H₂₀ and 3,4′-Cl₂-B₁₈H₂₀ (and Others)

Molecules, 2023
The action of AlCl3 on room-temperature tetrachloromethane solutions of anti-B18H22 (1) results in a mixture of fluorescent isomers, 3,3′-Cl2-B18H20 (2) and 3,4′-Cl2-B18H20 (3), together isolated in a 76% yield.
Marcel Ehn, Dmytro Bavol, Jonathan Bould, Vojtěch Strnad, Miroslava Litecká, Kamil Lang, Kaplan Kirakci, William Clegg, Paul G. Waddell, Michael G. S. Londesborough   +9 more
doaj   +1 more source

Catalyst Halogenation Enables Rapid and Efficient Polymerizations with Visible to Far-Red Light.

Journal of the American Chemical Society, 2020
Driving rapid polymerizations with visible to near-infrared light will enable nascent technologies in the emerging fields of bio- and composite-printing.
Alex Stafford, Dowon Ahn, Emily K Raulerson, Kun-You Chung, K. Sun, Danielle M. Cadena, Elena Forrister, Shane R. Yost, S. Roberts, Zachariah A. Page   +9 more
semanticscholar   +1 more source

Electrochemical Chemo‐ and Regioselective Heterofunctionalization of Tropones via C(sp2)H Derivatization

Advanced Synthesis &Catalysis, EarlyView.
Simple and selective. The electrochemical heterofunctionalization of activated tropones is achieved using readily available inorganic salts. A theoretical model, based on cyclic voltammetry and quantum chemistry calculations, predicts both reactivity trends and site selectivity.
Mauro Garbini, Samuele Moncullo, Sofia Kiriakidi, Manuela Melucci, Sara Bellini, Chiara Zanardi, Carlos Silva López, Giulio Bertuzzi, Marco Bandini   +8 more
wiley   +1 more source