ChemInform Abstract: Palladium-Catalyzed Cyclization Reaction of Allylic Bromides with 1,2-Dienyl Ketones. An Efficient Synthesis of 3-Allylic Polysubstituted Furans.

ChemInform ◽  
2010 ◽  
Vol 31 (27) ◽  
pp. no-no
Author(s):  
Shengming Ma ◽  
Lintao Li
Keyword(s):  
Cyclization Reaction ◽  
Efficient Synthesis ◽  
Palladium Catalyzed

Efficient Synthesis of 4H-3,1-Benzoxazine Derivatives via One-Pot Sequential Passerini-Azide/Palladium-Catalyzed Azide–Isocyanide Coupling/Cyclization Reaction

Synlett ◽  
2020 ◽  
Vol 31 (10) ◽  
pp. 1003-1006
Author(s):  
Jun Xiong ◽  
Qi-Xun Feng ◽  
Zhi-Ying Mu ◽  
Gang Yao ◽  
Jia-An Zhang ◽  
...  
Keyword(s):  
Cyclization Reaction ◽  
Efficient Synthesis ◽  
One Pot ◽  
Trimethylsilyl Azide ◽  
Palladium Catalyzed

A new, one-pot method for the synthesis of 4H-3,1-benzoxazine derivatives has been developed. The Passerini-azide reactions of 2-azidobenzaldehydes, trimethylsilyl azide, and isocyanides produced azide intermediate without separation, which then reacted with isocyanides to give 4H-3,1-benzoxazine derivatives via a tandem one-pot palladium-catalyzed azide–isocyanide coupling/cyclization reaction in moderate to good yields.

An approach to unsymmetrical 3,3′-diindolylmethanes through Pd-catalyzed cascade Heck cyclization of allenamides and o-ethynylanilines

2021 ◽  
Author(s):  
Songjin Guo ◽  
Jiayi Chen ◽  
Mingjun Yi ◽  
Liuli Dong ◽  
Aijun Lin ◽  
...  
Keyword(s):  
Cyclization Reaction ◽  
Efficient Synthesis ◽  
Highly Efficient ◽  
Heck Cyclization ◽  
Palladium Catalyzed

A highly efficient synthesis of unsymmetrical 3,3′-diindolylmethanes has been developed by palladium-catalyzed cascade Heck/cyclization reaction.

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.

Rh(iii)-catalyzed cyclization reaction of azoles with alkynes: efficient synthesis of azole-fused-pyridines

2015 ◽  
Vol 13 (35) ◽  
pp. 9186-9189 ◽  
Author(s):  
Xuebing Chen ◽  
Youzhi Wu ◽  
Jinyi Xu ◽  
Hequan Yao ◽  
Aijun Lin ◽  
...  
Keyword(s):  
Cyclization Reaction ◽  
Efficient Synthesis

A Rh(iii)-catalyzed cyclization of azoles with alkynes has been developed to construct azole-fused-pyridines in good to excellent yields.

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