Results 101 to 110 of about 319 (128)

Novel Synthesis of Azocine, Azepine, Oxocine, and Oxepine Derivatives by Palladium-catalyzed Medium-Ring Formation from Bromoallenes

HETEROCYCLES, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Hiroaki Ohno, Hisao Hamaguchi, Miyo Ohata, Shohei Kosaka, Tetsuaki Tanaka   +4 more
openaire   +1 more source

ChemInform Abstract: Regioselective Synthesis of Oxepin‐ and Oxocin‐Annulated Quinolines by Combined “Claisen‐Rearrangement/Olefin‐Metathesis” Reactions.

ChemInform, 2008
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Sven Rotzoll, Helmar Goerls, Peter Langer   +2 more
openalex   +2 more sources

Novel Palladium-Catalyzed Oxidative Intramolecular Cyclization of β-Citronellol with H2O2: A Green and Selective Process to Synthesize Oxocine

Catalysis Letters, 2017
In this work, we have found that the pair palladium acetate/hydrogen peroxide promoted a rare oxidative cyclization of β-citronellol, resulting in the selective formation of a novel monoterpene derivative (i.e., (Z)-4,8,8-trimethyl-3,4,5,8-tetrahydro-2H-oxocine). The activity of different palladium-catalysts was assessed. Palladium acetate was the most
M. J. da Silva, Jesus Avendano Villarreal   +1 more
openaire   +1 more source

Novel synthesis of oxocine derivatives by Wittig olefination and intramolecular Heck reaction via 8-endo trig cyclization

Tetrahedron Letters, 2008
A concise and efficient method for the preparation of oxocine derivatives is described via sequential Wittig and intramolecular Heck reactions. The method is highly regioselective and affords high yields of the products.
K.C. Majumdar, B. Chattopadhyay, B. Sinha   +2 more
openaire   +1 more source

A Synthesis of Substituted 3,6-Dihydro-1H-benzo[c]oxocines via Claisen Rearrangement and Ring-closing Metathesis

HETEROCYCLES, 2002
Started from isovanillin, based on Claisen rearrangement and ring-closing metathesis (RCM) reaction, a series of substituted 3,6-dihydro-1H-benzo[c]oxocines were synthesized in moderate yields.
Eng-Chi Wang, Chin-Cheng Wang, Ming-Kun Hsu, Keng-Shiang Huang   +3 more
openaire   +1 more source

A Synthesis of Substituted 3,6‐Dihydro‐1H‐benzo[c]oxocines via Claisen Rearrangement and Ring‐Closing Metathesis.

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Eng‐Chi Wang, Chin‐Cheng Wang, Ming‐Kun Hsu, Keng‐Shiang Huang   +3 more
openaire   +1 more source

Modeling for electrical impedance spectroscopy of (4E)-2-amino-3-cyanobenzo[b]oxocin-6-one by artificial neural network

Ceramics International, 2018
Abstract The efficiency of artificial neural networks (ANNs) for modeling the electrical impedance spectroscopy of (4E)-2-amino-3-cyanobenzo[b]oxocin-6-one was investigated. The experimental data for electrical impedance and dissipation factor were used as input data for the model.
H.A.M. Ali, R. A. Mohamed
openalex   +2 more sources

ChemInform Abstract: Novel Synthesis of Oxocine Derivatives by Wittig Olefination and Intramolecular Heck Reaction via 8‐endo trig Cyclization.

ChemInform, 2008
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
K. C. Majumdar, B. Chattopadhyay, B. Sinha   +2 more
openaire   +1 more source

Regioselective access of alkylidendibenzo[c,f]oxocine framework via cyclocarbopalladation/cross-coupling cascade reactions and reductive Heck strategy

New Journal of Chemistry, 2017
Palladium-catalyzed dual strategies of cascade cyclocarbopalladation/cross-coupling of alkynes and a reductive Heck reaction have been developed to construct dibenzo[c,f]oxocine frameworks with tri- and tetra-substituted exo-cyclic alkenes with high stereo- and regio-control.
openaire   +1 more source

Visible-Light-Induced [4 + 3]-Annulation of Carbonyl Ylides with Alkenyl Pyrazolinone for Constructing [4.2.1]-Oxo-Bridged Oxocine Skeleton

Organic Letters
Herein, we present a visible-light-induced protocol for the synthesis of highly functionalized oxo-bridged oxocine skeletons. This method generates carbenes via visible-light-induced ortho-acyl diazo compounds, which are rapidly intercepted by the oxygen atom of an intermolecular acyl group to form a cyclic 1,3-dipole.
Dong-Sheng Ji, Xin Zhang, Peiqin Zhang, Xiazhen Bao, Yong Yuan, Congde Huo, Peng-Fei Xu   +6 more
openaire   +2 more sources