نتایج جستجو برای: heck reaction

تعداد نتایج: 413170  

Journal: :Chemical communications 2013
Bagineni Prasad B Yogi Sreenivas G Rama Krishna Ravikumar Kapavarapu Manojit Pal

Unprecedented synthesis of functionalized indoles of potential pharmacological interest has been developed via a Pd-mediated cascade reaction involving an intramolecular Heck coupling followed by the construction of a fused cyclopentane ring in a single pot.

Journal: :Chemical communications 2013
Shan Tang Chao Liu Aiwen Lei

Through a nickel-catalysed Heck-type reaction, a direct coupling of alkenes with α-cyano alkyl bromides was achieved. This procedure provides a novel way for the synthesis of β,γ-unsaturated nitriles.

Journal: :Organic & biomolecular chemistry 2012
Pietro Cotugno Antonio Monopoli Francesco Ciminale Nicola Cioffi Angelo Nacci

Pd nanoparticles generated in green reaction media (viz. ionic liquids and water) catalyze the one-pot sequential Heck and Suzuki coupling reactions of bromo-chloroarenes to afford unsymmetrically substituted arenes in good yields.

Journal: :Organic & biomolecular chemistry 2013
Yulin Tian Jianguo Qi Chenbin Sun Dali Yin Xiaojian Wang Qiong Xiao

An efficient, one-pot synthesis of 4-methylisoquinolines via a cascade Pd-catalyzed Heck reaction, intramolecular cyclization and isomerization has been developed. This reaction has a wide range of substrates with various functional groups, and the corresponding products have been obtained in good yields.

2011
René Csuk Sabrina Albert

Rhaponticin and its 3”-fluoroanalog have been prepared from easily accessible starting materials. The key step of these syntheses is the silver carbonate-mediated glycosidation reaction employed for the selective formation of a β -glycosidic bond. A palladium acetate-catalyzed Heck-Mizoroki reaction in triethanolamine established an (E) configuration in the stilbene with simultaneous deprotecti...

Journal: :Chemical communications 2013
Sijia Liu Jianrong Steve Zhou

An asymmetric Heck reaction allows desymmetrization of substituted cyclic olefins in high dr and ee. A bisphosphine oxide is uniquely stereoselective for this purpose. Desymmetrization of bicyclic olefins via hydroarylation can also be realized in high ee.

2016
M. H. Sayahi B. Mirza

A novel and efficient palladium-based homogeneous catalyst was fabricated and used as a robust catalyst in Suzuki–Miyaura cross-coupling and Heck reactions. 2-Amino-N(pyridin-2-ylmethyl)benzamide was introduced as a versatile ligand for palladiumcatalyzed cross-coupling reactions. The desired active and stable homogeneous Pd catalyst was prepared via the coordination of Pd with 2-amino-N-(pyrid...

Journal: :Organic letters 2002
Kumaravel Selvakumar Alexander Zapf Matthias Beller

[reaction: see text] The Heck reaction of aryl chlorides was investigated in the presence of defined monocarbenepalladium(0) complexes. Activated and nonactivated aryl chlorides provide the corresponding cinnamic esters and stilbenes in (n)Bu(4)NBr as a ionic liquid in good to excellent yields.

2014
Yong Wook Kim Gunda I. Georg

An oxidative boron-Heck reaction of cyclic enaminones with arylboronic acids is reported. This protocol provides a regioselective arylation at the C6 position of cyclic enaminones. When an N-carbamylated cyclic enaminone was employed, a switch to a conjugate addition reaction occurred in the presence of acid.

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