ChemInform Abstract: CROSS COUPLING OF MAGNESIUM DIALKYL DERIVATIVES WITH ALLYL COMPOUNDS CATALYZED BY COPPER SALTS

1985 ◽  
Vol 16 (27) ◽  
Author(s):  
A. G. IBRAGIMOV ◽  
R. A. SARAEV ◽  
U. M. DZHEMILEV
Keyword(s):  
Cross Coupling ◽  
Copper Salts ◽  
Allyl Compounds

Unmasking of aminoanthroquinone moiety through a ring opening in the presence of copper salts and a subsequent cross-coupling/recyclization cascade

2007 ◽  
Vol 48 (10) ◽  
pp. 1867-1870 ◽  
Author(s):  
S.F. Vasilevsky ◽  
L.M. Gornostaev ◽  
A.A. Stepanov ◽  
E.V. Arnold ◽  
I.V. Alabugin
Keyword(s):  
Ring Opening ◽  
Cross Coupling ◽  
Copper Salts

Copper-catalyzed ultrasonic-promoted coupling of acetylene analogs, dialkyl azo dicarboxylate, and benzazoles to assemble tricyclic fused-ring [1,2,3]triazolo[3,4-b][1,3]benzazole analogs

2021 ◽  
Vol 18 ◽  
Author(s):  
Manijeh Nematpour ◽  
Nafiseh Karimi ◽  
Mohammad Mahboubi-Rabbani
Keyword(s):  
Elemental Analysis ◽  
Cross Coupling ◽  
Copper Salts ◽  
Reaction Conditions ◽  
Ring Systems ◽  
Fused Ring ◽  
Coupling Sequence

: An unprecedented copper-catalyzed reaction of acetylene analogs with dialkyl azo dicarboxylate and benzazole analogs via a cross-coupling sequence was reported. A library of triazolobenzazole fused ring systems including [1,2,3]triazolo[3,4-b][1,3]benzothiazole, [1,2,3]triazolo[3,4-b][1,3]benzoxazole and [1,2,3]triazolo[3,4-b][1,3]benzimidazole structures were obtained in moderate to excellent yields under very mild reaction conditions. Structural confirmation of the final products became possible using different methods like spectroscopy and elemental analysis. The control experiments indicated C-H activation of acetylene by copper salts, followed by cycloaddition between a 2-(phenylethynyl)benzo[d]azol-3(2H)-yl anion and azo dicarboxylate as the key mechanistic feature. The broad substrate scope with simple and easily-affordable starting materials as well as mild reaction conditions are the noticeable attributes of this methodology which provides facile access to the desired products.

scholarly journals The effects of amines on oxidative homo-coupling of terminal alkynes promoted by copper salts

2005 ◽  
Vol 2005 (2) ◽  
pp. 112-115 ◽  
Author(s):  
Lei Wang ◽  
Jincan Yan ◽  
Pinhua Li ◽  
Min Wang ◽  
Caina Su
Keyword(s):  
Reaction Medium ◽  
Cross Coupling ◽  
Catalytic Amount ◽  
Sonogashira Reaction ◽  
Coupling Reactions ◽  
Sonogashira Coupling ◽  
Terminal Alkynes ◽  
Copper Salts ◽  
Terminal Acetylenes ◽  
Glaser Coupling

The effects of all kinds of amines on homo-couplings (Glaser reactions) of terminal alkynes promoted by copper salts and the Sonogashira coupling reactions were studied systematically. Diethylamine (2° amine) can serve as an excellent solvent, base and coordination ligand in the oxidative homo-coupling of terminal alkynes and several modified Glaser coupling procedures have been developed which are based on a catalytic amount of cuprous salts (CuI, CuBr or CuCl) with diethylamine systems. Homo-coupling of terminal acetylenes in the Sonogashira reaction could be inhibited by using triethylamine (3° amine) as reaction medium, and the cross-coupling products were formed as the exclusive products.

Photoredox/Pd dual-catalytic three-component cross-coupling

2020 ◽  
Author(s):  
Logan Forshee ◽  
Kaitie Cartwright ◽  
Jon Tunge ◽  
Megan Hegarty
Keyword(s):  
Cross Coupling
Sign in / Sign up

Export Citation Format

Share Document