Construction of a 4H-pyrido[4,3,2-gh]phenanthridin-5(6H)-one skeleton via a catalyst-free radical cascade addition/cyclization using azo compounds as radical sources

2018 ◽  
Vol 5 (5) ◽  
pp. 793-796 ◽  
Author(s):  
Chen Zhang ◽  
Junxia Pi ◽  
Shu Chen ◽  
Ping Liu ◽  
Peipei Sun
Keyword(s):  
Free Radical ◽  
Cascade Reaction ◽  
Radical Addition ◽  
Azo Compounds ◽  
Aromatic Substitution ◽  
Catalyst Free ◽  
Homolytic Aromatic Substitution ◽  
Radical Cascade

The new radical addition/cyano insertion/homolytic aromatic substitution cascade reaction initiated by the thermal homolysis of azo compounds under catalyst-free conditions produced polycyclic phenanthridine derivatives.

A metal-free radical cascade reaction of phosphine oxides with 2-aryloxy phenylacetylenes to assemble diphosphonyl xanthene derivatives

2021 ◽  
Author(s):  
Tao Fan ◽  
Yan Liu ◽  
Caina Jiang ◽  
Yanli Xu ◽  
Yan-Yan Chen
Keyword(s):  
Free Radical ◽  
Transition Metal ◽  
Cascade Reaction ◽  
Phosphine Oxides ◽  
Metal Free ◽  
Mild Conditions ◽  
Xanthene Derivatives ◽  
Reaction Proceeds ◽  
Radical Cascade

A radical cascade reaction of 2-aryloxy phenylacetylene with phosphine oxides promoted by K2S2O8 was developed, provided diphosphonyl xanthenes as products. This reaction proceeds under transition metal-free and mild conditions with...

Visible-light-mediated radical cascade reaction: synthesis of 3-bromocoumarins from alkynoates

2017 ◽  
Vol 15 (41) ◽  
pp. 8820-8826 ◽  
Author(s):  
Shangbiao Feng ◽  
Jinlai Li ◽  
Zaimin Liu ◽  
Haiyu Sun ◽  
Hongliang Shi ◽  
...  
Keyword(s):  
Visible Light ◽  
Cascade Reaction ◽  
Radical Addition ◽  
Reaction Synthesis ◽  
Radical Cascade

The development of a visible-light mediated bromo radical addition/spirocyclization/ester migration cascade reaction to generate 3-bromocoumarins from alkynoates is reported.

Silyl radical initiated radical cascade addition/cyclization: synthesis of silyl functionalized 4H-pyrido[4,3,2-gh]phenanthridin-5(6H)-ones

2018 ◽  
Vol 16 (47) ◽  
pp. 9223-9229 ◽  
Author(s):  
Chen Zhang ◽  
Junxia Pi ◽  
Lei Wang ◽  
Ping Liu ◽  
Peipei Sun
Keyword(s):  
Double Bond ◽  
Cyano Group ◽  
Aromatic Substitution ◽  
Silyl Radical ◽  
Carbon Double Bond ◽  
Homolytic Aromatic Substitution ◽  
Radical Cascade

A cyclization cascade initiated by the addition of a silyl radical to an electron-deficient carbon–carbon double bond of N-arylacrylamides, followed by intramolecular cyano group insertion and homolytic aromatic substitution has been reported.

scholarly journals The role of photocatalysts in radical chains in homolytic aromatic substitution, radical addition to olefins, and nucleophilic radical substitution mechanisms

2020 ◽  
Vol 10 (15) ◽  
pp. 5113-5128 ◽  
Author(s):  
Damian E. Yerien ◽  
Sebastián Barata-Vallejo ◽  
Erwin W. Mora Flores ◽  
Al Postigo
Keyword(s):  
Radical Addition ◽  
Chain Termination ◽  
Aromatic Substitution ◽  
Homolytic Aromatic Substitution ◽  
Radical Substitution

Initiation, propagation and chain termination steps in oxidative and reductive quenching cycles for the photoinitiated perfluoroalkylation reaction of an olefin.

Additive-Free Radical Cascade Reaction of Oxime Esters: Synthesis of Pyrroline-Functionalized Phenanthridines

2020 ◽  
Vol 85 (19) ◽  
pp. 12284-12293
Author(s):  
Yijie Xue ◽  
Dengqi Xue ◽  
Qian He ◽  
Qianwei Ge ◽  
Wei Li ◽  
...  
Keyword(s):  
Free Radical ◽  
Cascade Reaction ◽  
Radical Cascade
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