Results 1 to 10 of about 5,533 (176)

Transition-Metal-Free [3+2] Dehydration Cycloaddition of Donor-Acceptor Cyclopropanes With 2-Naphthols

Frontiers in Chemistry, 2021
A Brønsted acid-catalyzed domino ring-opening cyclization transformation of donor-acceptor (D-A) cyclopropanes and 2-naphthols has been developed.
Hua Zhao, Peng Shen, Dongru Sun, Hongbin Zhai, Yufen Zhao   +4 more
doaj   +1 more source

Photoinduced Atom Transfer Radical Addition/Cyclization Reaction between Alkynes or Alkenes with Unsaturated α-Halogenated Carbonyls

Molecules, 2021
We have developed a photochemical ATRA/ATRC reaction that is mediated by halogen bonding interactions. This reaction is caused by the reaction of malonic acid ester derivatives containing bromine or iodine with unsaturated compounds such as alkenes and ...
Kazuki Matsuo, Tadashi Yoshitake, Eiji Yamaguchi, Akichika Itoh   +3 more
doaj   +1 more source

Probing the Conductive and Tribological Behaviors of Solid Additives in Multiply Alkylated Cyclopentanes for Sliding Electrical Contact

Nanomaterials, 2022
Sliding electrical contacts need to be lubricated by conductive lubricants to perform low energy dissipation, high reliability, and long service life.
Zhengfeng Cao, Qiuyu Shi, Xiangyu Ge, Shuliang Liu, Bo Wei, Ting Wang   +5 more
doaj   +1 more source

Modular access to chiral cyclopentanes via formal [2+2+1] annulation enabled by palladium/chiral squaramide relay catalysis

Tetrahedron Chem, 2022
An enantio- and diastereodivergent [2+2+1] annulation reaction of allyl ketones, acidic methylene compounds, and nitroalkenes to assemble highly functionalized cyclopentanes from readily available substances enabled by asymmetric relay catalysis of ...
Lian-Feng Fan, Rui Liu, Pu-Sheng Wang, Liu-Zhu Gong   +3 more
doaj   +1 more source

Ionic Liquids as Performance Ingredients in Space Lubricants

Molecules, 2021
Low vapor pressure and several other outstanding properties make room-temperature ionic liquids attractive candidates as lubricants for machine elements in space applications.
Erik Nyberg, Christoph Schneidhofer, Lucia Pisarova, Nicole Dörr, Ichiro Minami   +4 more
doaj   +1 more source

One-pot asymmetric cyclocarbohydroxylation sequence for the enantioselective synthesis of functionalised cyclopentanes [PDF]

, 2010
International audienceA new method has been developed for the enantioselective synthesis of highly functionalised cyclopentanes bearing up to three stereogenic centres with very high stereoselectivity.
Bonne, Damien, Dulcère, Jean-Pierre, Lettieri, Grégory, Raimondi, Wilfried, Rodriguez, Jean   +4 more
core   +3 more sources

Polar alicyclic rings: synthesis and structure of all cis-1,2,3,4-tetrafluorocyclopentane [PDF]

, 2016
The authors are grateful to the Chinese Scholarship Council for Studentship support (ZF), to EPSRC for financial support and to the EPSRC National Mass Spectrometry Service at Swansea for analytical support.
Al-Maharik, Nawaf, Buehl, Michael, Fang, Zeguo, O'Hagan, David, Slawin, Alexandra M. Z.   +4 more
core   +2 more sources

Potent GH20 N-Acetyl-β-d-hexosaminidase Inhibitors: N-Substituted 3-acetamido-4-amino-5-hydroxymethyl-cyclopentanediols

Molecules, 2018
From 1,2;3,4-di-O-isopropylidene-d-galactopyranose, a preliminary series of highly functionalized amino(hydroxymethyl)cyclopentanes was easily available. These amine-containing basic carbasugars featuring the d-galacto configuration are potent inhibitors
Patrick Weber, Seyed A. Nasseri, Bettina M. Pabst, Ana Torvisco, Philipp Müller, Eduard Paschke, Marion Tschernutter, Werner Windischhofer, Stephen G. Withers, Tanja M. Wrodnigg, Arnold E. Stütz   +10 more
doaj   +1 more source

Stereodivergent, Diels-Alder-initiated organocascades employing α,β-unsaturated acylammonium salts: scope, mechanism, and application. [PDF]

, 2017
Chiral α,β-unsaturated acylammonium salts are novel dienophiles enabling enantioselective Diels-Alder-lactonization (DAL) organocascades leading to cis- and trans-fused, bicyclic γ- and δ-lactones from readily prepared dienes, commodity acid chlorides ...
Abbasov, Mikail E, Hudson, Brandi M, Romo, Daniel, Tantillo, Dean J   +3 more
core   +2 more sources

Catalytic upgrading of hydrothermal liquefaction biocrudes: Different challenges for different feedstocks [PDF]

, 2019
Hydrothermal liquefaction (HTL) followed by catalytic hydrotreating of the produced biocrude is increasingly gaining ground as an effective technology for the conversion of biomass into liquid biofuels.
Castello, Daniele, Haider, Muhammad Salman, Rosendahl, Lasse Aistrup   +2 more
core   +3 more sources