Metal-free TBHP-mediated oxidative ring openings of 2-arylimidazopyridines via regioselective cleavage of C–C and C–N bonds

RSC Advances ◽  
2015 ◽  
Vol 5 (121) ◽  
pp. 100102-100105 ◽  
Author(s):  
Kelu Yan ◽  
Daoshan Yang ◽  
Wei Wei ◽  
Guoqing Li ◽  
Mingyang Sun ◽  
...  
Keyword(s):  
Ring Opening ◽  
Metal Free ◽  
Mild Conditions ◽  
First Time

A highly regioselective TBHP-mediated ring opening of imidazopyridinesviacleavage of C–C and C–N bonds has been realized for the first time to afford usefulN-(pyridin-2-yl)benzamides under mild conditions.

B(C6F5)3-catalyzed metal-free hydrogenation of naphthylamines

2015 ◽  
Vol 13 (10) ◽  
pp. 2875-2878 ◽  
Author(s):  
Gen Li ◽  
Yongbing Liu ◽  
Haifeng Du
Keyword(s):  
Metal Free ◽  
Mild Conditions ◽  
Catalytic Metal ◽  
High Yields ◽  
First Time

A catalytic metal-free hydrogenation of naphthylamines using B(C6F5)3 was achieved under mild conditions for the first time to furnish tetrahydronaphthylamines in high yields.

Merrifield resin-supported quinone as an efficient biomimetic catalyst for metal-free, base-free, chemoselective synthesis of 2,4,6-trisubstituted pyridines

2019 ◽  
Vol 21 (20) ◽  
pp. 5683-5690 ◽  
Author(s):  
Qing Yang ◽  
Yilin Zhang ◽  
Wei Zeng ◽  
Zheng-Chao Duan ◽  
Xinxin Sang ◽  
...  
Keyword(s):  
Free Base ◽  
Metal Free ◽  
Mild Conditions ◽  
Biomimetic Catalyst ◽  
Chemoselective Synthesis ◽  
Merrifield Resin ◽  
First Time

Metal-free, base-free, biomimetic, and chemoselective synthesis of 2,4,6-trisubstituted pyridines was developed for the first time under mild conditions.

A Sequential Ugi-Smiles / Transition-Metal-Free Endo-Dig Conia-ene Cyclization: The Selective Synthesis of Saccharin Substituted 2,5-dihydropyrroles

2021 ◽  
Author(s):  
Hassan Seyrani ◽  
Sorour Ramezanpour ◽  
Aref Vaezghaemi ◽  
Farzad Kobarfard
Keyword(s):  
Transition Metal ◽  
Free Access ◽  
Selective Synthesis ◽  
Metal Free ◽  
Mild Conditions

A convenient, transition-metal-free access to a series of unprecedented saccharin substituted 2,5-dihydropyrroles is reported. This approach employs a post-Ugi-Smiles 5-endo-dig Conia-ene cyclization sequence in mild conditions while incorporating a series...

Metal‐free direct oxidative C–N bond coupling of quinoxalin‐2(1H)‐ones with azoles under mild conditions

2021 ◽  
Author(s):  
Jingwen Guo ◽  
Lina Zhang ◽  
Xinyue Du ◽  
Liting Zhang ◽  
Yuepiao Cai ◽  
...  
Keyword(s):  
Metal Free ◽  
Mild Conditions

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...

scholarly journals An entry to 2-(cyclobut-1-en-1-yl)-1H-indoles through a cyclobutenylation/deprotection cascade

2021 ◽  
Author(s):  
Philipp Natho ◽  
Zeyu Yang ◽  
Lewis Allen ◽  
Juliette Rey ◽  
Andrew J P White ◽  
...  
Keyword(s):  
Transition Metal ◽  
One Pot ◽  
Metal Free ◽  
Mild Conditions

A transition-metal-free strategy for the synthesis of 2-(cyclobut-1-en-1-yl)-1H-indoles under mild conditions is described herein. A series of substituted 2-(cyclobut-1-en-1-yl)-1H-indoles are accessed by a one-pot cyclobutenylation/deprotection cascade from N-Boc protected indoles....

Metal-Free Synthesis of Highly Substituted Pyridines by Formal [2+2+2] Cycloaddition under Mild Conditions

2016 ◽  
Vol 128 (41) ◽  
pp. 13056-13059 ◽  
Author(s):  
Lan-Gui Xie ◽  
Saad Shaaban ◽  
Xiangyu Chen ◽  
Nuno Maulide
Keyword(s):  
Metal Free ◽  
Mild Conditions ◽  
Substituted Pyridines

Copper and triphenylphosphine-promoted sulfenylation of quinones with arylsulfonyl chlorides

RSC Advances ◽  
2016 ◽  
Vol 6 (67) ◽  
pp. 62298-62301 ◽  
Author(s):  
Xiaoli Yu ◽  
Qiujin Wu ◽  
Huida Wan ◽  
Zhaojun Xu ◽  
Xingle Xu ◽  
...  
Keyword(s):  
Mild Conditions ◽  
First Time

The copper and triphenylphosphine-promoted sulfenylation of quinones with arylsulfonyl chlorides has been developed under mild conditions with moderate to good yields. This is the first time to prepare arylthioquinones with arylsulfonyl chlorides.

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