نتایج جستجو برای: pot procedure

تعداد نتایج: 629235  

Ali Ezabadi, Fatemeh Tosan

An efficient and expeditious catalyst-free procedure was developed for the one- pot synthesis of 1, 4-dihydropyridine derivatives via the three-component reaction of various aldehydes, ethyl acetoacetate, and ammonium acetate in PEG-400. The reaction was carried out at 110°С and the products were obtained in good to high yields.

Abdolhamid Bamoniri, Bi Bi Fatemeh Mirjalili, Seyedeh Azita Fazeli Attar

A highly efficient procedure for the preparation of N,N'-alkylidenebisamides in the presence of BF3.SiO2 as a catalyst is described. N,N'-alkylidenebisamides have been prepared via one-pot three-component condensation reaction of various aldehydes and amides. All of the reactions proceeded in high yields and in moderately short reaction times.

Journal: :Chemical communications 2017
Nikki L Sloan Sajinder K Luthra Graeme McRobbie Sally L Pimlott Andrew Sutherland

An operationally simple, one-pot, two-step tandem procedure that allows the incorporation of radioactive iodine into aryl amines via stable diazonium salts is described. The mild conditions are tolerant of various functional groups and substitution patterns, allowing late-stage, rapid access to a wide range of 125I-labelled aryl compounds and SPECT radiotracers.

Journal: :Chemical communications 2016
Michèle Chevrier Sébastien Richeter Olivier Coulembier Mathieu Surin Ahmad Mehdi Roberto Lazzaroni Rachel C Evans Philippe Dubois Sébastien Clément

Poly(3-hexylthiophene)s end-functionalized with π-extended porphyrins have been synthesized in a one-pot procedure. The polymers show a broad absorption profile extending to 700 nm and a fibrillar microstructure, which can be tuned through judicious selection of the porphyrin molar ratio.

Journal: :Organic & biomolecular chemistry 2008
Naoki Hayashi Yusuke Hirokawa Ikuya Shibata Makoto Yasuda Akio Baba

Hydroindation of allenes and radical cyclization of 1,2,7-trienes (allenenes) were accomplished by HInCl2 with high regioselectivity to afford a variety of cyclic compounds. The resulting vinylic indiums could be used for successive coupling reactions in a one-pot procedure. The use of HInCl2 generated slowly in situ is extremely effective for the radical cyclization.

Journal: :Organic letters 2009
Inhee Cho Labros Meimetis Robert Britton

A bidirectional ortho metalation of the readily available chiral diol hydrobenzoin has been developed that provides direct access to new ortho-functionalized hydrobenzoin derivatives. This one-pot procedure should broaden the utility of hydrobenzoin as an auxiliary and ligand in asymmetric synthesis.

Journal: :Organic letters 2003
Petra Köhling Axel M Schmidt Peter Eilbracht

[reaction: see text] A novel one-pot synthesis of indole systems via tandem hydroformylation/Fischer indole synthesis starting from olefins and arylhydrazines is described. This tandem procedure leads directly to 3-substituted indoles if unsubstituted phenylhydrazine is used and to 3,5- respectively 3,7-disubstituted indoles if para- or ortho-substituted arylhydrazines are used.

2013
Ping-An Wang Sheng-Yong Zhang Henri B Kagan

A series of chiral 10-heteroazatriquinanes were synthesized from enantiopure asymmetric cis-2,5-disubstituted pyrrolidines through a one-pot tandem cyclization procedure. The structures and configurations of these new chiral 10-heteroazatriquinanes are confirmed by X-ray single-crystal diffraction analysis.

Journal: :Chemical communications 2012
Liis Seinberg Shinpei Yamamoto Ruwan Gallage Masahiko Tsujimoto Yoji Kobayashi Seiji Isoda Mikio Takano Hiroshi Kageyama

We have successfully implemented a facile, one-pot solventless synthesis procedure starting from acetylacetonate salts and CaH(2) to obtain carbon-coated ferromagnetic metallic Ni and Fe nanoparticles at low temperature. The use of CaH(2) as a reductant drastically reduces reaction temperature down to 140 °C.

Journal: :Chemical communications 2015
Lawrence W-Y Wong Jack W-H Kan Thanh-ha Nguyen Herman H-Y Sung Dang Li Alex S-F Au-Yeung Rajpal Sharma Zhenyang Lin Ian D Williams

Bis(mandelato)borate [B(Man)2](-) (R- or S-) anions are simply prepared and appear widely effective for resolution of racemic cations. Three examples demonstrate their scope; the alkaloid tetrahydropalmatine (THP), 1,2-diaminopropane (1,2-dap) and the metal-organic complex [Co(phen)3](3+) are readily resolved, either by a facile one-pot procedure, or via counter-ion metathesis.

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