[3 + 2] Cycloaddition of Nitrile Ylides with Diazonium Salts: Copper-Catalyzed One-Pot Synthesis of Fully Substituted 1,2,4-Triazoles

2018 ◽  
Vol 20 (17) ◽  
pp. 5224-5227 ◽  
Author(s):  
Huihuang Li ◽  
Xueli Wu ◽  
Weiwei Hao ◽  
Haiyan Li ◽  
Yanwei Zhao ◽  
...  
2018 ◽  
Vol 83 (20) ◽  
pp. 12595-12608 ◽  
Author(s):  
Réka J. Faggyas ◽  
Megan Grace ◽  
Lewis Williams ◽  
Andrew Sutherland

Author(s):  
Rochelle McGrory ◽  
Reka Faggyas ◽  
Andrew Sutherland

A mild and effective one-pot synthesis of 1,2,3-benzotriazin-4(3H)-ones and benzothiatriazine-1,1(2H)-dioxide analogues has been developed. The method involves the diazotisation and subsequent cyclisation of 2-aminobenzamides and 2-aminobenzenesulfonamides via stable diazonium salts,...


2020 ◽  
Author(s):  
Lucien Caspers ◽  
Julian Spils ◽  
Mattis Damrath ◽  
Enno Lork ◽  
Boris Nachtsheim

In this article we describe an efficient approach for the synthesis of cyclic diaryliodonium salts. The method is based on benzyl alcohols as starting materials and consists of an Friedel-Crafts-arylation/oxidation sequence. Besides a deep optimization, particluar focusing on the choice and ratios of the utilized Bronsted-acids and oxidants, we explore the substrate scope of this transformation. We also discuss an interesting isomerism of cyclic iodonium salts substituted with aliphatic substituents at the bridge head carbon. <br>


2017 ◽  
Vol 7 (12) ◽  
pp. 1192-1195
Author(s):  
Y. I. Shaikh ◽  
G. M. Nazeruddin ◽  
Khursheed Ahmed

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