Polythene glycol (PEG) as a reusable solvent system for the synthesis of 1,3,5-triazines via aerobic oxidative tandem cyclization of benzylamines and N-substituted benzylamines with amidines under transition metal-free conditions

2016 ◽  
Vol 18 (1) ◽  
pp. 144-149 ◽  
Author(s):  
Abhishek R. Tiwari ◽  
Bhalchandra M. Bhanage
Keyword(s):  
Transition Metal ◽  
Solvent System ◽  
Metal Free ◽  
Highly Efficient ◽  
Tandem Cyclization ◽  
Peg 600

A highly efficient protocol for the synthesis of 1,3,5-triazines from benzylamines and amidines in PEG-600 has been developed.

One-pot transition-metal free transamidation to sterically hindered amides

2018 ◽  
Vol 5 (20) ◽  
pp. 2950-2954 ◽  
Author(s):  
Weijie Guo ◽  
Jingjun Huang ◽  
Hongxiang Wu ◽  
Tingting Liu ◽  
Zhongfeng Luo ◽  
...  
Keyword(s):  
Transition Metal ◽  
Good Yield ◽  
One Pot ◽  
Metal Free ◽  
Highly Efficient ◽  
Sterically Hindered

A highly efficient one-pot transamidation of primary amides has been developed under transition-metal free conditions, generating a variety of amides including hindered amides in good yield (up to 86%) catalyzed by CsF.

Visible-light-induced tandem cyclization of 2-alkynylanilines with disulfides: a convenient method for accessing benzothiophenes under transition-metal-free and photocatalyst-free conditions

2017 ◽  
Vol 15 (36) ◽  
pp. 7678-7684 ◽  
Author(s):  
Xiaoyu Xie ◽  
Pinhua Li ◽  
Qing Shi ◽  
Lei Wang
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Convenient Method ◽  
Metal Free ◽  
Efficient Route ◽  
Tandem Cyclization

An efficient route to benzothiophenes via visible-light induced cyclization of 2-alkynylanilines with disulfides under transition-metal-free and photocatalyst-free conditions was developed.

Transition-metal-free C–C bond cleavage and formation: efficient synthesis of 2,3-diarylimidazo[1,2-α]pyridines from 2-aminopyridines and alkynoates

RSC Advances ◽  
2016 ◽  
Vol 6 (89) ◽  
pp. 86464-86467 ◽  
Author(s):  
Zhengwang Chen ◽  
Yuelu Wen ◽  
Guotian Luo ◽  
Min Ye ◽  
Qinghao Wang
Keyword(s):  
Transition Metal ◽  
Bond Cleavage ◽  
Cyclization Reaction ◽  
Efficient Synthesis ◽  
Metal Free ◽  
Highly Efficient

A highly efficient transition-metal-free cyclization reaction for the synthesis of 2,3-diarylimidazo[1,2-α]pyridines is described.

Visible-light-induced aerobic oxidative desulfurization of 2-mercaptobenzimidazoles via a sulfinyl radical

2020 ◽  
Vol 22 (17) ◽  
pp. 5594-5598 ◽  
Author(s):  
Mei Fu ◽  
Xiaochen Ji ◽  
Yongtong Li ◽  
Guo-Jun Deng ◽  
Huawen Huang
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Oxidative Desulfurization ◽  
Metal Free ◽  
Highly Efficient ◽  
Sulfinyl Radical

A mild transition-metal-free non-toxic aerobic photoredox system was found to enable highly efficient desulfurization of 2-mercaptobenzimidazoles.

Highly efficient and stable peracid for rapid and selective oxidation of aliphatic amines to oximes

2015 ◽  
Vol 39 (8) ◽  
pp. 6677-6682 ◽  
Author(s):  
Vilas V. Patil ◽  
Eknath M. Gayakwad ◽  
Ganapati S. Shankarling
Keyword(s):  
Transition Metal ◽  
Selective Oxidation ◽  
Aliphatic Amines ◽  
Metal Free ◽  
Highly Efficient ◽  
Benzylic Amines

A novel, transition-metal free, rapid approach for selective oxidation of aliphatic and benzylic amines to oximes is described.

The highly efficient air oxidation of aryl and alkyl boronic acids by a microwave-assisted protocol under transition metal-free conditions

2019 ◽  
Vol 21 (17) ◽  
pp. 4614-4618 ◽  
Author(s):  
Weiyan Yin ◽  
Xizhi Pan ◽  
Wenxi Leng ◽  
Jian Chen ◽  
Haifeng He
Keyword(s):  
Transition Metal ◽  
Boronic Acids ◽  
Air Oxidation ◽  
Metal Free ◽  
Microwave Assisted ◽  
Highly Efficient

A rapid, green and efficient microwave-assisted protocol is developed for the air oxidation of boronic acids to phenols and alcohols under transition metal-free conditions.

Transition-metal free thiocyanooxygenation of functionalized alkenes: facile routes to SCN-containing dihydrofurans and lactones

2016 ◽  
Vol 14 (11) ◽  
pp. 3098-3104 ◽  
Author(s):  
Li-Na Guo ◽  
Yu-Rui Gu ◽  
Hua Yang ◽  
Jie Hu
Keyword(s):  
Transition Metal ◽  
Economical Method ◽  
Metal Free ◽  
Mild Conditions ◽  
Tandem Cyclization

An efficient transition-metal free tandem cyclization of functionalized alkenes with thiocyanate salts has been developed under mild conditions. This protocol offers a simple, easy-to-handle, and atom-economical method for the synthesis of SCN-containing dihydrofurans and lactones with good to excellent yields.

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