scholarly journals A Highly Reactive Dicationic Iridium(III) Catalyst for the Polarized Nazarov Cyclization Reaction

2010 ◽  
Vol 49 (19) ◽  
pp. 3363-3366 ◽  
Author(s):  
Tulaza Vaidya ◽  
Abdurrahman C. Atesin ◽  
Ildiko R. Herrick ◽  
Alison J. Frontier ◽  
Richard Eisenberg
Keyword(s):  
Cyclization Reaction ◽  
Nazarov Cyclization

A Cr(salen)-based metal–organic framework as a versatile catalyst for efficient asymmetric transformations

2016 ◽  
Vol 52 (89) ◽  
pp. 13167-13170 ◽  
Author(s):  
Qingchun Xia ◽  
Yan Liu ◽  
Zijian Li ◽  
Wei Gong ◽  
Yong Cui
Keyword(s):  
Heterogeneous Catalyst ◽  
Metal Organic Framework ◽  
Diels Alder ◽  
Cyclization Reaction ◽  
Nazarov Cyclization ◽  
Asymmetric Transformations ◽  
Metal Organic ◽  
Organic Framework

A novel Cr(salen)-based metal–organic framework (MOF) is constructed, which is shown to be a versatile heterogeneous catalyst for a series of important asymmetric transformations including Nazarov cyclization reaction, aminolysis reaction, Diels–Alder and hetero Diels–Alder reactions with the highest ee up to 99%.

ChemInform Abstract: A Highly Reactive Dicationic Iridium(III) Catalyst for the Polarized Nazarov Cyclization Reaction.

ChemInform ◽  
2010 ◽  
Vol 41 (36) ◽  
pp. no-no ◽  
Author(s):  
Tulaza Vaidya ◽  
Abdurrahman C. Atesin ◽  
Ildiko R. Herrick ◽  
Alison J. Frontier ◽  
Richard Eisenberg
Keyword(s):  
Cyclization Reaction ◽  
Nazarov Cyclization

A Highly Reactive Dicationic Iridium(III) Catalyst for the Polarized Nazarov Cyclization Reaction

2010 ◽  
Vol 122 (19) ◽  
pp. 3435-3438 ◽  
Author(s):  
Tulaza Vaidya ◽  
Abdurrahman C. Atesin ◽  
Ildiko R. Herrick ◽  
Alison J. Frontier ◽  
Richard Eisenberg
Keyword(s):  
Cyclization Reaction ◽  
Nazarov Cyclization

Recent progress towards the transition-metal-catalyzed Nazarov cyclization of alkynes via metal carbenes

2021 ◽  
Author(s):  
Wen-Bo Shen ◽  
Guang-Xin Ru ◽  
Ting-Ting Zhang ◽  
Meng Zhang ◽  
Xiao-Lei Jiang ◽  
...  
Keyword(s):  
Transition Metal ◽  
Recent Progress ◽  
Cyclization Reaction ◽  
Diazo Compounds ◽  
Nazarov Cyclization ◽  
Metal Carbenes ◽  
Transition Metal Catalyzed ◽  
Tandem Cyclization ◽  
Metal Catalyzed

In recent years, transition-metal-catalyzed tandem cyclization reaction of alkyne, especially involving metal carbene intermediate, has received worthwhile interest as it bypasses the employment of risky and potentially explosive diazo compounds...

Synthesis of Novel Bis-pyrazoles via Electrophilic Cyclization

2019 ◽  
Vol 16 (6) ◽  
pp. 511-516
Author(s):  
Adnan Cetin
Keyword(s):  
13C Nmr ◽  
Cyclization Reaction ◽  
Electrophilic Cyclization ◽  
Pyrazole Derivatives ◽  
Spectral Analyses ◽  
Mass Spectral ◽  
Palladium Catalyzed ◽  
Ft Ir ◽  
Reaction Compound

Efficient steps towards the synthesis of novel (phenyl)(1'-aryl-1,5,5'-triphenyl[3,3'-bi-1Hpyrazol]- 4-yl)methanones 4a-e were developed. The procedure starts from 1-(4-benzoyl-1,5-diphenyl- 1H-3-pyrazolyl)-3-phenyl-2-propyn-1-one (2) which was synthesized by a palladium catalyzed crosscoupling reaction. Compound 2 reacted with various hydrazines to give (E)-(phenyl)[1,5-diphenyl-3- [3-phenyl-1-(2-arylhydrazono)-2-propyn-1-yl]-1H-4-pyrazolyl]methanones E-3a-e. The bis-pyrazole derivatives 4a-e were synthesized from electrophilic cyclization reaction of α,β-acetylenic hydrazones E-3a-e and copper(I) iodide. All synthesized compounds were characterized by FT-IR, 1H, 13C NMR and Mass spectral analyses.

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