A green, ionic liquid and quaternary ammonium salt-catalyzed aza-Michael reaction of α,β-ethylenic compounds with amines in water

2004 ◽  
Vol 28 (2) ◽  
pp. 183-184 ◽  
Author(s):  
Li-Wen Xu ◽  
Jing-Wei Li ◽  
Shao-Lin Zhou ◽  
Chun-Gu Xia
Keyword(s):  
Ionic Liquid ◽  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Michael Reaction

scholarly journals Rhodium-Catalyzed Oxidative Annulation of 2- or 7-Arylindoles with Alkenes/Alkynes Using Molecular Oxygen as the Sole Oxidant Enabled by Quaternary Ammonium Salt

Molecules ◽  
2021 ◽  
Vol 26 (17) ◽  
pp. 5329
Author(s):  
Weihui Zhuang ◽  
Jiaqi Zhang ◽  
Yanping Zheng ◽  
Qiufeng Huang
Keyword(s):  
Molecular Oxygen ◽  
Ammonium Salt ◽  
Catalytic System ◽  
Quaternary Ammonium ◽  
Atmospheric Pressure ◽  
Quaternary Ammonium Salt ◽  
Michael Reaction ◽  
Mechanistic Studies ◽  
Dehydrogenative Coupling

Developing an efficient catalytic system using molecular oxygen as the oxidant for rhodium-catalyzed cross-dehydrogenative coupling remains highly desirable. Herein, rhodium-catalyzed oxidative annulation of 2- or 7-phenyl-1H-indoles with alkenes or alkynes to assemble valuable 6H-isoindolo[2,1-a]indoles, pyrrolo[3,2,1-de]phenanthridines, or indolo[2,1-a]isoquinolines using the atmospheric pressure of air as the sole oxidant enabled by quaternary ammonium salt has been accomplished. Mechanistic studies provided evidence for the fast intramolecular aza-Michael reaction and aerobic reoxidation of Rh(I)/Rh(III), facilitated by the addition of quaternary ammonium salt.

A quaternary ammonium salt [H-dabco][AcO]: as a recyclable and highly efficient catalyst for the one-pot synthesis of β-phosphonomalonates

RSC Advances ◽  
2015 ◽  
Vol 5 (37) ◽  
pp. 28857-28863 ◽  
Author(s):  
Ya-Qin Yu ◽  
Da-Zhen Xu
Keyword(s):  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Michael Reaction ◽  
Recyclable Catalyst ◽  
One Pot ◽  
Efficient Catalyst ◽  
Highly Efficient ◽  
One Pot Synthesis ◽  
The One

A recyclable catalyst for one-pot synthesis of β-phosphonomalonates via tandem Knoevenagel–phospha-Michael reaction.

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