scholarly journals Markovnikov-addition of H-phosphonates to terminal alkynes under metal- and solvent-free conditions

RSC Advances ◽  
2021 ◽  
Vol 11 (40) ◽  
pp. 24991-24994
Author(s):  
Nana Xin ◽  
Yongjian Lian ◽  
Yongzheng Lv ◽  
Yongjie Wang ◽  
Xian-Qiang Huang ◽  
...  
Keyword(s):  
Solvent Free ◽  
Terminal Alkynes ◽  
Solvent Free Conditions ◽  
Markovnikov Addition

Synthesis of α-vinylphosphonates from terminal alkynes and H-phosphonates as only the Markovnikov-regioisomer under metal- and solvent-free conditions.

scholarly journals Homocoupling of terminal alkynes catalyzed by CuCl under solvent-free conditions

2021 ◽  
pp. 174751982110325
Author(s):  
Yan Xiao ◽  
Jiyu Gao ◽  
Peng Chen ◽  
Guangliang Chen ◽  
Zicheng Li ◽  
...  
Keyword(s):  
Functional Group ◽  
Reaction Times ◽  
Environmentally Friendly ◽  
Solvent Free ◽  
Copper Salt ◽  
Terminal Alkynes ◽  
Mild Conditions ◽  
Solvent Free Conditions ◽  
Environmentally Friendly Process

A series of symmetrical 1,4-disubstituted buta-1,3-diynes is prepared with excellent yields (up to 95%) through homocoupling of terminal alkynes catalyzed by a copper salt under solvent-free conditions. This method provides an environmentally friendly process to prepare 1,3-diynes in short reaction times under mild conditions. Furthermore, the method is suitable for a wide substrate scope and has excellent functional group compatibility. The reaction can also be scaled up to gram level.

Unprecedented one-pot multicomponent synthesis of propargylamines using Amberlyst A-21 supported CuI under solvent-free conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (57) ◽  
pp. 46074-46087 ◽  
Author(s):  
Giovanna Bosica ◽  
John Gabarretta
Keyword(s):  
Coupling Reaction ◽  
Solvent Free ◽  
Environmentally Benign ◽  
Terminal Alkynes ◽  
Multicomponent Synthesis ◽  
One Pot ◽  
Solvent Free Conditions

An environmentally benign, one-pot, A3-coupling reaction of various aldehydes, amines and terminal alkynes for the synthesis of propargylamine was catalysed by Amberlyst A-21 supported CuI, under heterogeneous and solvent-free conditions.

Heterogeneous Gold(III)-Catalysed Double Hydroamination of 2-Alkynylanilines with Terminal Alkynes Leading to N-Vinylindoles

2018 ◽  
Vol 42 (11) ◽  
pp. 558-563
Author(s):  
Weisen Yang ◽  
Li Wei ◽  
Feiyan Yi ◽  
Mingzhong Cai
Keyword(s):  
Magnetic Nanoparticles ◽  
Gold Catalyst ◽  
Significant Loss ◽  
Solvent Free ◽  
Terminal Alkynes ◽  
External Magnet ◽  
Solvent Free Conditions ◽  
Supported Gold

Heterogeneous double hydroamination of 2-alkynylanilines with terminal alkynes was achieved by using a magnetic nanoparticles-supported gold(III)-2,2′-bipyridine complex and silver trifluoromethanesulfonate as catalysts to afford the corresponding N-vinylindoles in moderate to good yields under mild and solvent-free conditions. The heterogeneous gold catalyst can easily be separated from the reaction mixture by simply applying an external magnet and can be recycled up to seven times without significant loss of activity.

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