312534-71-7Relevant articles and documents
BIARYL HYDROXYTHIOPHENE GROUP IV TRANSITION METAL POLYMERIZATION CATALYSTS WITH CHAIN TRANSFER CAPABILITY
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Paragraph 0418-0420, (2022/02/05)
Catalyst systems that include a chain transfer agent and a metal-ligand complex according to formula (I).
Synthesis of Racemic, Diastereopure, and Enantiopure Carba- or Oxa[5]-, [6]-, [7]-, and -[19]helicene (Di)thiol Derivatives
Nejedly, Jind?ich,?ámal, Michal,Rybá?ek, Ji?í,Sánchez, Isabel Gay,Houska, Václav,Warzecha, Tomá?,Vacek, Jaroslav,Sieger, Ladislav,Budě?ínsky, Milo?,Bednárová, Lucie,Fiedler, Pavel,Císa?ová, Ivana,Stary, Ivo,Stará, Irena G.
, p. 248 - 276 (2020/01/02)
A series of carba- or oxa[5]-, [6]-, [7]-, and -[19]helicene (di)thiols was prepared. The Miyazaki-Newman-Kwart rearrangement of (dimethylcarbamothioyl)oxy (oxa)helicenes in a flow reactor or nucleophilic substitution of dichloro (oxa)helicenes with alkan
Benzofuran liquid crystal compound and composition thereof
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Paragraph 0047; 0048; 0049; 0071; 0072; 0073, (2018/04/01)
The invention discloses a benzofuran liquid crystal compound containing a benzofuran ring. The structural general formula of the liquid crystal compound is (shown in the description), wherein R represents either one of the straight-chain paraffin with the
Synthesis of 8-azaprotosappanin A derivatives via intramolecular palladium-catalyzed ortho C-H activation/C-C cyclization and their antibacterial activity
Zhou, Xuan,Fu, Wanyong,Jiang, Hongshuo,Wang, Chenglong,Ju, Chao,Chu, Wenyi,Sun, Zhizhong
supporting information, p. 1956 - 1960 (2017/03/11)
A novel synthetic protocol for the construction of eight-membered heterocycles by intramolecular palladium-catalyzed ortho C-H activation/C-C cyclization was proposed. With protosappanin A as the lead compound, 25 derivatives of 8-azaprotosappanin A were prepared in good yields by this protocol. Besides, a plausible reaction mechanism of the intramolecular cyclization was proposed. This strategy could be widely used in the synthesis of some natural products and drugs with large heterocycles due to the fast reaction rate and the mild conditions. In vitro antimicrobial activities of the synthesized compounds were assessed against the strains of Gram-positive bacteria and linezolid and ciprofloxacin were selected as the standard drugs. Some of the synthesized compounds were found to have excellent antibacterial activities.
Platinum-catalyzed α,β-unsaturated carbene formation in the formal syntheses of frondosin B and liphagal
Huynh, Khoi Q.,Seizert, Curtis A.,Ozumerzifon, Tarik J.,Allegretti, Paul A.,Ferreira, Eric M.
, p. 294 - 297 (2017/11/28)
Formal syntheses of tetracyclic terpenoids frondosin B and liphagal are described. Both synthetic routes rely on the use of platinum-catalyzed α,β-unsaturated carbene formation for the key C-C bond forming transformations. The successful route toward frondosin B utilizes a formal (4 + 3) cycloaddition, while the liphagal synthesis features the vinylogous addition of an enol nucleophile as a key step. Both synthetic routes are discussed, revealing insights into structural requirements in the catalytic a,β-unsaturated carbene reaction manifold.
Efficient iodination of aromatic compounds using potassium ferrate supported on montmorillonite
Keipour, Hoda,Khalilzadeh, Mohammad A.,Mohtat, Bita,Hosseini, Abolfazl,Zareyee, Daryoush
experimental part, p. 1427 - 1430 (2012/06/01)
Potassium ferrate impregnated on montmorillonite is a mild, cheap, and non-toxic reagent for the iodination of phenols, including naphthol, aromatic amines, and heterocyclic substrates in fair to excellent yields by a simple isolation procedure.
Green and efficient method for the iodination of phenols in water
Tajik, Hassan,Dadras, Akbar,Hosseini, Abolfazl
experimental part, p. 258 - 261 (2011/06/26)
In this article, green conversion of phenols to the corresponding iodide derivatives is reported. The reactions were conducted in water, using potassium iodide as the source of iodine and potassium ferrate as the oxidizing agent. The selected phenols were successfully iodinated in good to excellent yields in mild and non-toxic reaction conditions. Copyright Taylor & Francis Group, LLC.
A mild and simple iodination of phenols with trichloroisocyanuric acid/I2/wet SiO2 system
Akhlaghinia, Batool,Rahmani, Marzieh
experimental part, p. 3 - 6 (2010/08/19)
Molecular iodine in the presence of trichloroisocyanuric acid and wet sio2 has been utilized efficiently for iodination of phenols under mild reaction conditions.
A mild and simple regioselective iodination of activated aromatics with iodine and catalytic ceric ammonium nitrate
Das, Biswanath,Krishnaiah, Maddeboina,Venkateswarlu, Katta,Reddy, V. Saidi
, p. 81 - 83 (2007/10/03)
Molecular iodine in the presence of a catalytic amount of CAN has been utilized efficiently for regioselective iodination of activated aromatic compounds under mild reaction conditions.
Total Synthesis and Determination of the Absolute Configuration of Frondosin B
Masayuki, Inoue,Carson, Mattew W.,Frontier, Alison J.,Danishefsky, Samuel J.
, p. 1878 - 1889 (2007/10/03)
Two concise syntheses of (+/-)-frondosin B (1), an interleukin-8 receptor antagonist, have been achieved from commercially available 5-methoxysalicylaldehyde. The seven-membered ring in ketone 33, the common intermediate for both syntheses, was built by a