KAl(SO4)2×12H2O as a Recyclable Lewis Acid Catalyst for Synthesis of Some New Oxindoles in Aqueous Media.

ChemInform ◽  
2004 ◽  
Vol 35 (45) ◽  
Author(s):  
Javad Azizian ◽  
Ali A. Mohammadi ◽  
Ali R. Karimi ◽  
Mohammad R. Mohammadizadeh
Keyword(s):  
Lewis Acid ◽  
Aqueous Media ◽  
Acid Catalyst ◽  
Lewis Acid Catalyst

KAl(SO4)2 · 12H2O as a Recyclable Lewis Acid Catalyst for Synthesis of Spirooxindoles in Aqueous Media

2011 ◽  
Vol 41 (22) ◽  
pp. 3344-3350 ◽  
Author(s):  
Hossein A. Oskooie ◽  
Majid M. Heravi ◽  
Narges Karimi ◽  
Hoda Hamidi
Keyword(s):  
Lewis Acid ◽  
Aqueous Media ◽  
Acid Catalyst ◽  
Lewis Acid Catalyst

ChemInform Abstract: KAl(SO4)2·12H2O as a Recyclable Lewis Acid Catalyst for Synthesis of Spirooxindoles in Aqueous Media.

ChemInform ◽  
2012 ◽  
Vol 43 (18) ◽  
pp. no-no
Author(s):  
Hossein A. Oskooie ◽  
Majid M. Heravi ◽  
Narges Karimi ◽  
Hoda Hamidi
Keyword(s):  
Lewis Acid ◽  
Aqueous Media ◽  
Acid Catalyst ◽  
Lewis Acid Catalyst

KAl(SO4)2.12H2O as a recyclable Lewis acid catalyst for synthesis of some new oxindoles in aqueous media

2004 ◽  
Vol 2004 (6) ◽  
pp. 424-426 ◽  
Author(s):  
Javad Azizian ◽  
Ali A. Mohammadi ◽  
Ali R. Karimi ◽  
Mohammad R. Mohammadizadeh
Keyword(s):  
Lewis Acid ◽  
Aqueous Media ◽  
Acid Catalyst ◽  
Lewis Acid Catalyst

Zirconium nitrate: a reusable water tolerant Lewis acid catalyst for the synthesis of N-substituted pyrroles in aqueous media

RSC Advances ◽  
2012 ◽  
Vol 2 (15) ◽  
pp. 6174 ◽  
Author(s):  
Alireza Hasaninejad ◽  
Mohsen Shekouhy ◽  
Mohammad Reza Mohammadizadeh ◽  
Abdolkarim Zare
Keyword(s):  
Lewis Acid ◽  
Aqueous Media ◽  
Acid Catalyst ◽  
Zirconium Nitrate ◽  
Lewis Acid Catalyst ◽  
Substituted Pyrroles

Computationally-Guided Investigation of Dual Amine/pi Lewis Acid Catalysts for Direct Additions of Aldehydes and Ketones to Unactivated Alkenes and Alkynes

2020 ◽  
Author(s):  
Eric Greve ◽  
Jacob D. Porter ◽  
Chris Dockendorff
Keyword(s):  
Lewis Acid ◽  
Density Functional ◽  
Acid Catalyst ◽  
Metal Catalyst ◽  
Catalyst Poisoning ◽  
Lewis Acid Catalysts ◽  
Metal Ligands ◽  
Aldehydes And Ketones ◽  
Lewis Acid Catalyst ◽  
Catalyst Systems

Dual amine/pi Lewis acid catalyst systems have been reported for intramolecular direct additions of aldehydes/ketones to unactivated alkynes and occasionally alkenes, but related intermolecular reactions are rare and not presently of significant synthetic utility, likely due to undesired coordination of enamine intermediates to the metal catalyst. We reasoned that bulky metal ligands and bulky amine catalysts could minimize catalyst poisoning and could facilitate certain examples of direct intermolecular additions of aldehyde/ketones to alkenes/alkynes. Density Functional Theory (DFT) calculations were performed that suggested that PyBOX-Pt(II) catalysts for alkene/alkyne activation could be combined with MacMillan’s imidazolidinone organocatalyst for aldehyde/ketone activation to facilitate desirable C-C bond formations, and certain reactions were calculated to be more exergonic than catalyst poisoning pathways. As calculated, preformed enamines generated from the MacMillan imidazolidinone did not displace ethylene from a biscationic (<i>t</i>-Bu)PyBOX-Pt<sup>2+</sup>complex, but neither were the desired C-C bond formations observed under several different conditions.

Computationally-Guided Investigation of Dual Amine/pi Lewis Acid Catalysts for Direct Additions of Aldehydes and Ketones to Unactivated Alkenes and Alkynes

2020 ◽  
Author(s):  
Eric Greve ◽  
Jacob D. Porter ◽  
Chris Dockendorff
Keyword(s):  
Lewis Acid ◽  
Density Functional ◽  
Acid Catalyst ◽  
Metal Catalyst ◽  
Catalyst Poisoning ◽  
Lewis Acid Catalysts ◽  
Metal Ligands ◽  
Aldehydes And Ketones ◽  
Lewis Acid Catalyst ◽  
Catalyst Systems

Dual amine/pi Lewis acid catalyst systems have been reported for intramolecular direct additions of aldehydes/ketones to unactivated alkynes and occasionally alkenes, but related intermolecular reactions are rare and not presently of significant synthetic utility, likely due to undesired coordination of enamine intermediates to the metal catalyst. We reasoned that bulky metal ligands and bulky amine catalysts could minimize catalyst poisoning and could facilitate certain examples of direct intermolecular additions of aldehyde/ketones to alkenes/alkynes. Density Functional Theory (DFT) calculations were performed that suggested that PyBOX-Pt(II) catalysts for alkene/alkyne activation could be combined with MacMillan’s imidazolidinone organocatalyst for aldehyde/ketone activation to facilitate desirable C-C bond formations, and certain reactions were calculated to be more exergonic than catalyst poisoning pathways. As calculated, preformed enamines generated from the MacMillan imidazolidinone did not displace ethylene from a biscationic (<i>t</i>-Bu)PyBOX-Pt<sup>2+</sup>complex, but neither were the desired C-C bond formations observed under several different conditions.

Bis(pentafluorophenyl)tin Dibromide as a Novel Organotin Halide Lewis Acid Catalyst

Synlett ◽  
1996 ◽  
Vol 1996 (09) ◽  
pp. 877-879 ◽  
Author(s):  
Jianxie Chen ◽  
Katsumasa Sakamoto ◽  
Akihiro Orita ◽  
Junzo Otera
Keyword(s):  
Lewis Acid ◽  
Acid Catalyst ◽  
Lewis Acid Catalyst

Asymmetric synthesis of isoquinuclidines by Diels–Alder reaction of 1,2-dihydropyridine utilizing a chiral Lewis acid catalyst

Tetrahedron ◽  
2012 ◽  
Vol 68 (6) ◽  
pp. 1774-1781 ◽  
Author(s):  
Chigusa Seki ◽  
Masafumi Hirama ◽  
N.D.M. Romauli Hutabarat ◽  
Junko Takada ◽  
Chonticha Suttibut ◽  
...  
Keyword(s):  
Asymmetric Synthesis ◽  
Lewis Acid ◽  
Acid Catalyst ◽  
Alder Reaction ◽  
Diels Alder ◽  
Diels Alder Reaction ◽  
Chiral Lewis Acid ◽  
Lewis Acid Catalyst
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