scholarly journals Efficient access to triarylmethanes through decarboxylation

RSC Advances ◽  
2017 ◽  
Vol 7 (12) ◽  
pp. 6966-6971 ◽  
Author(s):  
Tiash Saha ◽  
M. Srinivas Lavanya Kumar ◽  
Saurav Bera ◽  
Bidhu Bhusan Karkara ◽  
Gautam Panda
Keyword(s):  
Cross Coupling ◽  
Benzoic Acids ◽  
New Approach ◽  
Efficient Access ◽  
Palladium Catalyzed

A new approach has been developed for diverse triarylmethanes by palladium catalyzed decarboxylative sp2–sp3 cross coupling where benzoic acids reacted with diaryl methyl iodides having both electron donating and withdrawing functionalities.

scholarly journals Efficient access to β-vinylporphyrin derivatives via palladium cross coupling of β-bromoporphyrins with N-tosylhydrazones

2017 ◽  
Vol 13 ◽  
pp. 195-202 ◽  
Author(s):  
Vinicius R Campos ◽  
Ana T P C Gomes ◽  
Anna C Cunha ◽  
Maria da Graça P M S Neves ◽  
Vitor F Ferreira ◽  
...  
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Synthetic Methodology ◽  
New Approach ◽  
First Report ◽  
Cross Coupling Reaction ◽  
Efficient Access ◽  
Palladium Catalyzed

This work describes a new approach to obtain new β-vinylporphyrin derivatives through palladium-catalyzed cross-coupling reaction of 2-bromo-5,10,15,20-tetraphenylporphyrinatozinc(II) with N-tosylhydrazones. This is the first report of the use of such synthetic methodology in porphyrin chemistry allowing the synthesis of new derivatives, containing β-arylvinyl substituents.

A New Approach Towards the Synthesis of 3-Amino-6-(hetero)arylpyridazines Based on Palladium Catalyzed Cross-coupling Reactions

Tetrahedron ◽  
2000 ◽  
Vol 56 (12) ◽  
pp. 1777-1781 ◽  
Author(s):  
Bert U.W Maes ◽  
Guy L.F Lemière ◽  
Roger Dommisse ◽  
Koen Augustyns ◽  
Achiel Haemers
Keyword(s):  
Cross Coupling ◽  
Coupling Reactions ◽  
New Approach ◽  
Cross Coupling Reactions ◽  
Palladium Catalyzed

Efficient Access to Original 6-Substituted 5-Nitro-2,3-dihydro­imidazo[2,1-b]oxazoles

Synthesis ◽  
2017 ◽  
Vol 49 (12) ◽  
pp. 2775-2785 ◽  
Author(s):  
Fanny Mathias ◽  
Youssef Kabri ◽  
Maxime Crozet ◽  
Patrice Vanelle
Keyword(s):  
Intramolecular Cyclization ◽  
Bromine Atom ◽  
Cross Coupling ◽  
Sonogashira Reaction ◽  
Coupling Reactions ◽  
One Pot ◽  
Cross Coupling Reactions ◽  
Efficient Access ◽  
Palladium Catalyzed ◽  
Hydroxyethyl Group

A one-pot sequential intramolecular cyclization and Suzuki–Miyaura or Sonogashira reaction under microwave irradiation are reported in the 5-nitro-2,3-dihydroimidazo[2,1-b]oxazole series. The intramolecular cyclization of 1-(2,4-dibromo-5-nitro-1H-imidazol-1-yl)propan-2-ol between the hydroxyethyl group and the bromine atom at the 2-position is carried out first, followed by optimization and generalization of the Suzuki–Miyaura and Sonogashira cross-coupling reactions of the bromine atom at the 4-position. The various boronic acids and alkynyl derivatives used to perform these palladium-catalyzed cross-coupling reactions allowed to substitute the 6-position of 5-nitro-2,3-dihydroimidazo[2,1-b]oxazole compounds.

A New Approach to Nine-Membered Enediyne Using a Palladium Catalyzed Cross-Coupling Reaction

Synlett ◽  
1997 ◽  
Vol 1997 (4) ◽  
pp. 381-383 ◽  
Author(s):  
Hiroshi Tanaka ◽  
Haruo Yamada ◽  
Akihisa Matsuda ◽  
Takashi Takahashi
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
New Approach ◽  
Cross Coupling Reaction ◽  
Palladium Catalyzed

Palladium-Catalyzed Decarboxylation of Benzyl Fluorobenzoates

Synlett ◽  
2017 ◽  
Vol 28 (19) ◽  
pp. 2573-2576 ◽  
Author(s):  
Ryoichi Kuwano ◽  
Yusuke Makida ◽  
Yasutaka Matsumoto
Keyword(s):  
Benzoic Acid ◽  
Catalytic Reaction ◽  
Functional Group ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Benzoic Acids ◽  
Benzyl Alcohols ◽  
Cross Coupling Reaction ◽  
Palladium Catalyzed

The decarboxylation of benzyl fluorobenzoates has been developed by using the palladium catalyst prepared in situ from Pd(η3-allyl)Cp and bulky monophosphine ligand XPhos. The catalytic reaction afforded a range of fluorinated diarylmethanes in good yields with broad functional-group compatibility. The substrates were readily synthesized by condensation of the corresponding benzoic acid with benzyl alcohol. Therefore, the transformation is formally regarded as a cross-coupling reaction between fluorine-containing benzoic acids and benzyl alcohols.

ChemInform Abstract: A New Approach Towards the Synthesis of 3-Amino-6-(hetero)arylpyridazines Based on Palladium Catalyzed Cross-Coupling Reactions.

ChemInform ◽  
2010 ◽  
Vol 31 (26) ◽  
pp. no-no
Author(s):  
Bert U. W. Maes ◽  
Guy L. F. Lemiere ◽  
Roger Dommisse ◽  
Koen Augustyns ◽  
Achiel Haemers
Keyword(s):  
Cross Coupling ◽  
Coupling Reactions ◽  
New Approach ◽  
Cross Coupling Reactions ◽  
Palladium Catalyzed

Palladium-Catalyzed Cross-Coupling of 4-Tosyloxyquinazolines with H-phosphonates and Phosphine Oxides: An Efficient Access to 2-(hetero)aryl-4-phosphorylated Quinazolines

Synthesis ◽  
2021 ◽  
Author(s):  
Yiyuan Peng ◽  
xinglin ye ◽  
Jian Huang ◽  
Zhihong Deng
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Phosphine Oxides ◽  
Cross Coupling Reaction ◽  
Efficient Access ◽  
Palladium Catalyzed ◽  
Green Methodology

A series of 2-(hetero)aryl-4-phosphonylated quinazolines have been successfully synthesized via the palladium-catalyzed C-O/P-H cross-coupling reaction of 4-tosyloxyquinazoline with H-phosphonate and phosphine oxides in moderate to excellent yields. This efficient and green methodology provided alternative straightforward protocol for the introduction of phosphorus groups to quinazoline compounds at C4 position via C-O activation and enriched the quinazoline structure libraries.

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