Results 51 to 60 of about 105,486 (290)

Metal-Free Direct C–H Functionalization of Quinoxalin-2(1H)-Ones to Produce 3-Vinylated Quinoxalin-2(1H)-Ones in the Presence of Alkenes

Frontiers in Chemistry, 2021
A novel and efficient C3-H vinylation reaction with quinoxalin-2(1H)-one as the substrate, in the presence of alkenes, under metal-free conditions, is reported herein.
Rongcai Ding, Yingxue Li, Yaoyao Chang, Yue Liu, Jie Yu, Yanna Lv, Jinxing Hu   +6 more
doaj   +1 more source

Anomeric Amide‐Enabled Alkene‐Arene and Alkene‐Alkene Aminative Coupling

Angewandte Chemie International Edition
AbstractDespite the prominence of C−N bond forming cross‐coupling reactions as a strategy to assemble molecular fragments, aminative coupling approaches, in which two fragments are assembled directly at the heteroatom, represents a rarely exploited retrosynthetic strategy. Herein, we report the design, synthesis, and implementation of an anomeric amide
Colin Stein, Jasper L. Tyler, Julius Wiener, Florian Boser, Constantin G. Daniliuc, Frank Glorius   +5 more
openaire   +2 more sources

Characterization of carbon monoxide, methane and nonmethane hydrocarbons in emerging cities of Saudi Arabia and Pakistan and in Singapore [PDF]

, 2016
We investigate the composition of 63 C2-C10 nonmethane hydrocarbons (NMHCs), methane (CH4) and carbon monoxide (CO), in Jeddah, Mecca, and Madina (Saudi Arabia), in Lahore, (Pakistan), and in Singapore. We established a database with which to compare and
Aburizaiza, Omar S, Barletta, Barbara, Blake, Donald R, Blake, Nicola J, Emmons, Louisa K, Farrukh, Muhammad A, Khwaja, Haider A, Meinardi, Simone, Siddique, Azhar, Simpson, Isobel J, Yu, Liya E, Zeb, Jahan   +11 more
core   +1 more source

Covalent Organic Frameworks for Photocatalytic CO2 Reduction: Metal Integration Principles, Strategies and Functions

Advanced Functional Materials, EarlyView.
Covalent organic frameworks (COFs) with metals have been recognized as versatile platforms for photocatalytic CO2 reduction (CO2PRR). Herein, an overview of metal integration strategies for COFs is systematically summarized. Regulatory mechanisms and structure–activity relationships between metal integration and COF‐based CO2PRR are emphasized.
Jie He, Minxian Zhang, Jinqiang Zhang, Hongqi Sun, Shaobin Wang, Xiaoguang Duan   +5 more
wiley   +1 more source

Analysis of Oleogel Volatile Profile Formation under Ultrasonic Treatment

Gels, 2023
Under certain conditions, ultrasonic treatment of certain foods and ingredients can contribute to the appearance of an extraneous odor, which is not usual for them, especially in fat-containing products.
Yuliya Frolova, Mariia Makarenko, Alla Kochetkova   +2 more
doaj   +1 more source

In Situ 3D Bioprinting: Impact of Cross‐Linking on the Adhesive Properties of Hydrogels

Advanced Functional Materials, EarlyView.
In situ 3D bioprinting enables the direct deposition of cell‐laden, adhesive biomaterials for on‐site tissue regeneration. This review provides a comprehensive overview of how cross‐linking influences the bioadhesive properties of hydrogels used in 3D bioprinting, highlighting cross‐linking triggers, bioadhesion mechanisms, polymer interpenetration ...
Odile Romero Fernandez, Mulazim Hussain Asim, Shumaila Arshad, Gergely Kali, Andreas Bernkop‐Schnürch   +4 more
wiley   +1 more source

Photoredox-catalyzed intramolecular nucleophilic amidation of alkenes with β-lactams

Beilstein Journal of Organic Chemistry
The direct nucleophilic addition of amides to unfunctionalized alkenes via photoredox catalysis represents a facile approach towards functionalized alkylamides.
Valentina Giraldi, Giandomenico Magagnano, Daria Giacomini, Pier Giorgio Cozzi, Andrea Gualandi   +4 more
doaj   +1 more source

Iodoarene-Catalyzed Cyclizations of Unsaturated Amides [PDF]

, 2015
The cyclization of N-alkenylamides catalyzed by iodoarenes under oxidative conditions is presented. Five-, six-, and seven-membered rings with a range of substitutions can be prepared by this route.
Ali Alhalib, Bode H. B., Degnan B. M., Dohi T., Dohi T., Fujita M., Fujita M., Guilbault A.-A., Guilbault A.-A., Hamnett D. J., Kong A., Mizar P., Moon N. G., Murai T., Ngatimin M., Parra A., Richardson R. D., Rodríguez A., Rodríguez A., Shimogaki M., Somaia Kamouka, Suzuki S., Uyanik M., Uyanik M., Wesley J. Moran, Wu H., Yan J., Zhdankin V. V., Zheng Z. S., Zhong W., Zhou Z.-S.   +30 more
core   +1 more source

BACH, a Bayesian Optimization Protocol for Accurate Coarse‐Grained Parameterization of Organic Liquids

Advanced Functional Materials, EarlyView.
We present a fully automated Bayesian optimization (BO) protocol for the parameterization of nonbonded interactions in coarse‐grain CG force fields (BACH). Using experimental thermophysical data, we apply the protocol to a broad range of liquids, spanning linear, branched, and unsaturated hydrocarbons, esters, triglycerides, and water.
Janak Prabhu, Akhil Pratap Singh, Pablo Campomanes, Stefano Vanni   +3 more
wiley   +1 more source

Copper(I)-Photocatalyzed Addition of Trichloromethanesulfenyl Chloride to Olefinic Compounds

Molecules
Atom transfer radical addition (ATRA) reactions are essential transformations in organic synthetic chemistry that enable the atom-economic difunctionalization of abundant olefin feedstocks.
Nejc Petek, Tilen Zorko, Martin Škrinjar, Uroš Grošelj, Jurij Svete, Drago Kočar, Bogdan Štefane   +6 more
doaj   +1 more source