Direct synthesis of 4-hydroxycoumarins and 4-hydroxy-6-methyl-2-pyrone containing chroman-4-ones via silver catalyzed radical cascade cyclization reaction

2021 ◽  
Author(s):  
Suraj Sharma ◽  
Bipul Sarma ◽  
Gakul Baishya
Keyword(s):  
Direct Synthesis ◽  
Cyclization Reaction ◽  
Cascade Cyclization ◽  
Radical Cascade ◽  
First Time

For the first time, we report a novel silver catalyzed radical cascade cyclization reaction of 2-(allyloxy)arylaldehydes to synthesize two new libraries of chroman-4-ones by using 4-hydroxycoumarins and 4-hydroxy-6-methyl-2-pyrone as radical...

Copper-catalyzed radical cascade cyclization for the synthesis of phosphorated indolines

2015 ◽  
Vol 51 (19) ◽  
pp. 4101-4104 ◽  
Author(s):  
Hong-Yu Zhang ◽  
Liu-Liang Mao ◽  
Bin Yang ◽  
Shang-Dong Yang
Keyword(s):  
Cyclization Reaction ◽  
Cascade Cyclization ◽  
Convenient Approach ◽  
Radical Cascade

A novel and convenient approach to the synthesis of various phosphorated indolines via a copper-catalyzed radical cascade cyclization reaction has been developed.

Direct synthesis of 3-acylbenzothiophenes via the radical cyclization of 2-alkynylthioanisoles with α-oxocarboxylic acids

2018 ◽  
Vol 54 (100) ◽  
pp. 14148-14151 ◽  
Author(s):  
Wei Liu ◽  
Yao-Qian Hu ◽  
Xiao-Yi Hong ◽  
Guo-Xing Li ◽  
Xiao-Bo Huang ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
Radical Cyclization ◽  
Cascade Cyclization ◽  
Direct Route ◽  
Simple Chemical ◽  
Radical Cascade ◽  
Oxocarboxylic Acids

A radical cascade cyclization strategy has been developed to provide a direct route to access 3-acylbenzothiophenes from simple chemical feedstocks.

Radical Cascade Cyclization: Reaction of 1,6-Enynes with Aryl Radicals by Electron Catalysis

2016 ◽  
Vol 2016 (29) ◽  
pp. 4961-4964 ◽  
Author(s):  
Jun Xuan ◽  
Dario Gonzalez-Abradelo ◽  
Cristian Alejandro Strassert ◽  
Constantin-Gabriel Daniliuc ◽  
Armido Studer
Keyword(s):  
Cyclization Reaction ◽  
Cascade Cyclization ◽  
Aryl Radicals ◽  
Radical Cascade

Fe-Catalyzed Conjunctive Cross-Couplings of Unactivated Alkenes with Grignard Reagents

2020 ◽  
Author(s):  
Lei Liu ◽  
Wes Lee ◽  
Cassandra R. Youshaw ◽  
Mingbin Yuan ◽  
Michael B. Geherty ◽  
...  
Keyword(s):  
Functional Groups ◽  
Cross Coupling ◽  
Alkyl Halides ◽  
Grignard Reagents ◽  
Turnover Frequency ◽  
Diverse Range ◽  
Cascade Cyclization ◽  
Radical Cascade

The first iron-catalyzed three-component cross-coupling of unactivated olefins with alkyl halides and Grignard reagents is reported. The reaction operates under fast turnover frequency and tolerates a diverse range of sp2-hybridized nucleophiles, alkyl halides, and unactivated olefins bearing diverse functional groups to yield the desired 1,2-alkylarylated products with high regiocontrol. Further, we demonstrate that this protocol is amenable for the synthesis of new (hetero)carbocycles including tetrahydrofurans and pyrrolidines via a three-component radical cascade cyclization/arylation that forges three new C-C bonds.

Direct synthesis of jet fuel range dicycloalkane by the aqueous phase hydrodeoxygenation of polycarbonate

2021 ◽  
Author(s):  
Lulin Wang ◽  
Guangyi Li ◽  
Cong Yu ◽  
Ai-Qin Wang ◽  
Xiaodong Wang ◽  
...  
Keyword(s):  
Aqueous Phase ◽  
Direct Synthesis ◽  
Jet Fuel ◽  
Catalyst Systems ◽  
First Time

For the first time, propane-2,2-diyldicyclohexane, a jet fuel range C15 dicycloalkane was directly produced by the aqueous-phase hydrodeoxygenation (APHDO) of polycarbonate (PC). Among the investigated catalyst systems, a mixture of...

Eosin Y photoredox catalyzed net redox neutral reaction for regiospecific annulation to 3-sulfonylindoles via anion oxidation of sodium sulfinate salts

2018 ◽  
Vol 16 (4) ◽  
pp. 536-540 ◽  
Author(s):  
Rajendra S. Rohokale ◽  
Shrikant D. Tambe ◽  
Umesh A. Kshirsagar
Keyword(s):  
Visible Light ◽  
Eosin Y ◽  
Cascade Cyclization ◽  
Neutral Reaction ◽  
Neutral Process ◽  
Radical Cascade

An eosin Y photoredox catalyzed net redox neutral process for 3-sulfonylindoles via the anionic oxidation of sodium sulfinate salts and its radical cascade cyclization with 2-alkynyl-azidoarenes was developed with visible light as a mediator.

ChemInform Abstract: Superbase-Promoted Selective Cascade Cyclization Reaction of 1,5-Diketones with Acetylenes to Methylene-6,8-dioxabicyclo[3.2.1]octanes.

ChemInform ◽  
2013 ◽  
Vol 44 (37) ◽  
pp. no-no
Author(s):  
Elena Yu. Schmidt ◽  
Ivan A. Bidusenko ◽  
Nadezhda I. Protsuk ◽  
Igor A. Ushakov ◽  
Boris A. Trofimov
Keyword(s):  
Cyclization Reaction ◽  
Cascade Cyclization

Brønsted Acid-Catalyzed Solvent-Controlled Regioselective Hydrothiolation and Diastereoselective Cascade Cyclization of Dienes

2021 ◽  
Author(s):  
Kai Ji ◽  
Ka Lu ◽  
Jie Huang ◽  
Zi-Hao Li ◽  
Tong-Mei Ding ◽  
...  
Keyword(s):  
Free Atom ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Metal Free ◽  
Cascade Cyclization ◽  
Brönsted Acid ◽  
Acid Catalyzed ◽  
First Time

A highly regio- and diastereo-selective Brønsted acid-catalyzed tandem hydrothiolation/Friedel-Crafts reaction of linear 1,3-dienes has been developed for the first time, which provides a metal-free, atom-economic and concise way of constructing...

Iron-catalyzed radical cascade cyclization of oxime esters with isocyanides: synthesis of 1-cyanoalkyl isoquinolines and 6-cyanoalkyl phenanthridines

2021 ◽  
Vol 19 (39) ◽  
pp. 8597-8606
Author(s):  
Dengqi Xue ◽  
Rongqi Liu ◽  
Denggao Zhang ◽  
Ning Li ◽  
Yijie Xue ◽  
...  
Keyword(s):  
Cascade Cyclization ◽  
Radical Cascade

An iron-catalyzed radical cascade cyclization of oxime esters with isocyanides for the synthesis of 1-cyanoalkyl isoquinolines and 6-cyanoalkyl phenanthridines has been developed.

Catalytic Radical Cascade Cyclization of Alkene-Tethered Enones to Fused Bicyclic Cyclopropanols

2021 ◽  
Author(s):  
Ying Xie ◽  
Wei Huang ◽  
Song Qin ◽  
Shaomin Fu ◽  
Bo Liu
Keyword(s):  
Hydrogen Atom ◽  
Cascade Reaction ◽  
Hydrogen Atom Transfer ◽  
Atom Transfer ◽  
Trimethyl Borate ◽  
Cascade Cyclization ◽  
Radical Cascade ◽  
Privileged Scaffolds

An unprecedented hydrogen atom transfer-triggered intramolecular cascade reaction between alkene and enone is developed, using Fe(acac)3, PhSiH2(Oi-Pr) and trimethyl borate, to efficiently construct cis-fused bicyclic cyclopropanols, privileged scaffolds often found...

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