Metal-Free Synthesis of Polycyclic Quinazolinones Enabled by a (NH4 )2 S2 O8 -Promoted Intramolecular Oxidative Cyclization

2019 ◽  
Vol 2019 (22) ◽  
pp. 3649-3653 ◽  
Author(s):  
Lijuan Xie ◽  
Cong Lu ◽  
Dong Jing ◽  
Xinrui Ou ◽  
Ke Zheng
Keyword(s):  
Oxidative Cyclization ◽  
Metal Free ◽  
Intramolecular Oxidative Cyclization

Facile synthesis of 3-amino-5-aryl-1,2,4-oxadiazoles via PIDA-mediated intramolecular oxidative cyclization

RSC Advances ◽  
2016 ◽  
Vol 6 (59) ◽  
pp. 54277-54280 ◽  
Author(s):  
Kuan Lu ◽  
Liancheng Duan ◽  
Boxuan Xu ◽  
Weile Yin ◽  
Di Wu ◽  
...  
Keyword(s):  
Functional Groups ◽  
Simple Procedure ◽  
Oxidative Cyclization ◽  
Ambient Condition ◽  
Facile Synthesis ◽  
Metal Free ◽  
Intramolecular Oxidative Cyclization

Advantages: ambient condition and simple procedure. Additive and metal free method. Up to 25 examples and 79% yield. Wide functional groups tolerance.

Metal-free oxidative cyclization of trifluoroacetimidohydrazides with methylhetarenes: a facile access to 3-hetaryl-5-trifluoromethyl-1,2,4-triazoles

2021 ◽  
Author(s):  
Xiao-Feng Wu ◽  
Zhengkai Chen ◽  
Jiajun Zhang ◽  
Tian-Hui Xu
Keyword(s):  
Oxidative Cyclization ◽  
Efficient Synthesis ◽  
Metal Free

A metal-free oxidative cyclization of trifluoroacetimidohydrazides with methylhetarenes for the efficient synthesis of 3-hetaryl-5-trifluoromethyl-1,2,4-triazoles has been developed. Notable features of this protocol include readily accessible starting materials, a broad substrate...

ChemInform Abstract: I2Promoted Domino Oxidative Cyclization for One-Pot Synthesis of 2-Acylbenzothiazoles via Metal-Free sp3C-H Functionalization.

ChemInform ◽  
2012 ◽  
Vol 43 (52) ◽  
pp. no-no
Author(s):  
Yan-Ping Zhu ◽  
Mi Lian ◽  
Feng-Cheng Jia ◽  
Mei-Cai Liu ◽  
Jing-Jing Yuan ◽  
...  
Keyword(s):  
Oxidative Cyclization ◽  
One Pot ◽  
Metal Free ◽  
One Pot Synthesis

Electrochemical Oxidative Cyclization of Alkenes, Boronic Acids, and Dichalcogenides to Access Chalcogenated Boronic Esters and 1,3-Diols

2021 ◽  
Author(s):  
Changfeng Huang ◽  
Jijing Hu ◽  
Guangxian Chen ◽  
Minjian Wu ◽  
Hua Cao ◽  
...  
Keyword(s):  
Boronic Acids ◽  
Oxidative Cyclization ◽  
Environmentally Benign ◽  
Allylic Alcohols ◽  
Efficient Manner ◽  
Metal Free ◽  
Boronic Esters

A sustainable, environmentally benign electrochemical oxidative three-component cyclization of allylic alcohols, boronic acids, and dichalcogenides under metal-free and oxidant-free conditions has been developed, which provides an efficient manner for the...

Convenient Synthesis of Oxazolo[5,4-h]pyrrolo[4,3,2-de]quino­lones via Hypervalent Iodine Mediated Intramolecular Oxidative Cyclization

Synthesis ◽  
2017 ◽  
Vol 28 (19) ◽  
pp. 4517-4522
Author(s):  
Li-Ping Sun ◽  
Chun-Meng Wang ◽  
Sheng-Wei Yang ◽  
Kai-Xiang Tang ◽  
Tian-Hong Gao ◽  
...  
Keyword(s):  
Functional Groups ◽  
Practical Method ◽  
Oxidative Cyclization ◽  
Hypervalent Iodine ◽  
Air Atmosphere ◽  
Convenient Synthesis ◽  
Reaction Proceeds ◽  
Intramolecular Oxidative Cyclization

A convenient and practical method has been developed for the synthesis of substituted oxazolo[5,4-h]pyrrolo[4,3,2-de]quinolones via the intramolecular oxidative cyclization by using PIFA as oxidant and TMSOTf as additive in DCE under an air atmosphere. The reaction proceeds in good yields and has good functional groups tolerance.

Metal-free cyclization of unsaturated hydrazones for the divergent assembly of pyrazolones and pyrazolines

2019 ◽  
Vol 55 (61) ◽  
pp. 8943-8946 ◽  
Author(s):  
Xiaobing Liu ◽  
Yao Zhou ◽  
Qiuling Song
Keyword(s):  
Oxidative Cyclization ◽  
Metal Free

An oxidative cyclization of β,γ-unsaturated hydrazones for the divergent assembly of pyrazolones and pyrazolines under metal-free conditions is presented.

ChemInform Abstract: Synthesis of 6-Substituted Phenanthridines by Metal-Free, Visible-Light Induced Aerobic Oxidative Cyclization of 2-Isocyanobiphenyls with Hydrazines.

ChemInform ◽  
2014 ◽  
Vol 45 (36) ◽  
pp. no-no
Author(s):  
Tiebo Xiao ◽  
Linyong Li ◽  
Guoliang Lin ◽  
Qile Wang ◽  
Ping Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
Oxidative Cyclization ◽  
Metal Free
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