Results 91 to 100 of about 39,317 (310)

Electrochemical selenium- and iodonium-initiated cyclisation of hydroxy-functionalised 1,4-dienes

Beilstein Journal of Organic Chemistry, 2015
The cobalt(I)-catalysed 1,4-hydrovinylation reaction of allyloxytrimethylsilane and allyl alcohol with substituted 1,3-dienes leads to hydroxy-functionalised 1,4-dienes in excellent regio- and diastereoselective fashion.
Philipp Röse, Steffen Emge, Jun-ichi Yoshida, Gerhard Hilt   +3 more
doaj   +1 more source

Hydrazones as Singular Reagents in Asymmetric Organocatalysis [PDF]

, 2016
This Minireview summarizes strategies and developments regarding the use of hydrazones as reagents in asymmetric organocatalysis, their distinct roles in nucleophile–electrophile, cycloaddition, and cyclization reactions.
Fernández Fernández, Rosario Fátima, Lassaletta, José M., Matador Martínez, Esteban, Monge Fernández, David, Retamosa Hernández, María Gracia   +4 more
core   +1 more source

Polymerization of Cyclic Ethers Initiated by the Reaction of Cyclic Ether with Hexafluoropropylene Oxide.

NIPPON KAGAKU KAISHI, 2002
フッ素含有率の高いヘキサフルオロプロピレンオキシド(HFPO)と環状エーテルとの反応による重合について検討を行った．モノマーとして六員環エーテルであるテトラヒドロピラン(THP)を用いたときには，重合体は得られなかった．四員環エーテルであるオキセタン，および三員環エーテルであるプロピレンオキシド(PO)をモノマーとして用いたときに重合生成物が得られた． モノマーとしてオキセタンを用いたときに，最も高分子量の重合体を得ることができ，その数平均分子量は4.8 × 103であった．これは，オキセタンの開環重合反応性が，環状エーテルの中で最も高いためであると考えられる． モノマーとしてプロピレンオキシド(PO)を用いたときに得られる重合生成物は ...
Yasuyuki MASUBUCHI, Tokio HAGIWARA, Youichi IKEGAYA, Seiji KAWATA, Noriyuki YONEZAWA   +4 more
openaire   +2 more sources

Investigation of Halogen Substitution Effects in π‐Conjugated Organic Ligands of Chiral Hybrid Perovskites on Their Chiroptical Activity

Advanced Functional Materials, EarlyView.
The role of novel thiophene‐based ligands with halogen substitutions in enhancing the chiroptical and optoelectronic properties of 2D chiral HOIPs has been investigated. By tailoring ligand design, enhanced CD and CPL properties are achieved, with improved CPL discrimination in photodetectors.
Boesung Kwon, Doyeong Yeo, In‐Chul Hwang, In Hwan Jung, Joon Hak Oh   +4 more
wiley   +1 more source

Reaction engineering blocks ether cleavage for synthesizing chiral cyclic hemiacetals catalyzed by unspecific peroxygenase

Nature Communications
Hemiacetal compounds are valuable building blocks in synthetic chemistry, but their enzymatic synthesis is limited and often hindered by the instability of hemiacetals in aqueous environments.
Xiaofeng Han, Fuqiang Chen, Huanhuan Li, Ran Ge, Qianqian Shen, Peigao Duan, Xiang Sheng, Wuyuan Zhang   +7 more
doaj   +1 more source

Furan‐Substituted Phosphine‐Oxide as an Efficient Interfacial Modifier for Wide‐Bandgap Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
We report phosphine‐oxide interlayers for wide‐bandgap perovskite solar cells, in which tuned P = O Lewis basicity enables selective passivation of buried NiOx/perovskite interfaces and introduces interfacial dipoles that strengthen the built‐in field.
JeeHee Hong, Juan Anthony Prayogo, Soobin Heo, Jae Sung Yun, Dong Ryeol Whang, Dong Wook Chang, Hui Joon Park   +6 more
wiley   +1 more source

Multicomponent versus domino reactions: One-pot free-radical synthesis of β-amino-ethers and β-amino-alcohols

Beilstein Journal of Organic Chemistry, 2015
Following an optimized multicomponent procedure, an aryl amine, a ketone, and a cyclic ether or an alcohol molecule are assembled in a one-pot synthesis by nucleophilic radical addition of ketyl radicals to ketimines generated in situ.
Bianca Rossi, Nadia Pastori, Simona Prosperini, Carlo Punta   +3 more
doaj   +1 more source

Taming Hypervalent Bonds and Strained Rings for Catalysis and Synthesis

CHIMIA, 2014
Improving the synthesis of complex organic molecules is essential for progress in many fields such as medicine, agrochemicals or materials. Since 2007, our laboratory has been focusing on the development of non-classical bond disconnections ...
Florian de Nanteuil, Yifan Li, Maria Victoria Vita, Reto Frei, Eloisa Serrano, Sophie Racine, Jérôme Waser   +6 more
doaj   +1 more source

Alkoxy- and hydroxycyclization of enynes catalyzed by Pd(II) and Pt(II) catalysts [PDF]

, 2006
The development of a novel reaction ideal in terms of atom economy was achieved. The scope of the reaction was evaluated in the presence of Pd and Pt catalysts.
Charruault, Lise, Genêt, Jean-Pierre, Gladiali, Serafino Gabriele, Michelet, Véronique   +3 more
core  

Cyclic ether

, 2013
A process for preparing cyclic ethers is described. The process involves the reaction of at least one organic compound such as diols or polyol which it has at least one pair of hydroxyl groups separated by 5 or 5 carbon atoms, and which is capable of being converted into an ether linkage, with an organic carbonate in the presence of a base. The base is
H. Bevinakatti, C. Newman, S. Ellwood, TUNDO, Pietro, ARICO', Fabio, M. Schroeder   +5 more
openaire   +1 more source