33102-81-7Relevant articles and documents
Access to Thiazole via Copper-Catalyzed [3+1+1]-Type Condensation Reaction under Redox-Neutral Conditions
Tang, Xiaodong,Yang, Jidan,Zhu, Zhongzhi,Zheng, Meifang,Wu, Wanqing,Jiang, Huanfeng
, p. 11461 - 11466 (2016/11/28)
A new strategy for thiazoles via copper-catalyzed [3+1+1]-type condensation reaction from oximes, anhydrides and potassiumthiocyanate (KSCN) is developed herein. The transformation has good functional group tolerance and various thiazoles were formed smoothly in good to excellent yields under mild reaction conditions. This process involves copper-catalyzed N-O/C-S bond cleavages, activation of vinyl sp2 C-H bond, and C-S/C-N bond formations which are under redox-neutral conditions as well as operational simplicity.
Exploration and Optimization of an Efficient One-pot Sequential Synthesis of Di/tri-substituted Thiazoles from α-Bromoketones, Thioacids Salt, and Ammonium Acetate
Venkateswararao, Eeda,Jalani, Hitesh B.,Manoj,, Manickam,Jung, Sang-Hun
, p. 1449 - 1456 (2016/09/24)
Exploration of scope of an optimized one-pot sequential procedure for preparing of 2,4-di- and 2,4,5-tri-substituted thiazoles has been accomplished. The synthesis was performed by the initial formation of a β-keto-thioester intermediate from nucleophilic substitution of α-bromoketones with thioacid potassium salts, followed by treatment with ammonium acetate and one equivalent of acetic acid in toluene to form imine intermediate eventually leading to cyclization yielding thiazoles. This procedure should be highlighted with a flexible way to control the substitution pattern around thiazole ring by choosing appropriately substituted α-bromoketones even containing acid labile functionality and thioacid potassium salts, and thus its applicability is very wide.
Lipase and deep eutectic mixture catalyzed efficient synthesis of thiazoles in water at room temperature
Lobo, Hyacintha Rennet,Singh, Balvant Shyam,Shankarling, Ganapati Subray
, p. 1369 - 1375 (2013/01/15)
Lipase bio-catalyst or ammonium based deep eutectic mixture efficiently catalyzed aqueous phase synthesis of methyl-thiazole and amino-thiazole derivatives. The simple ammonium deep eutectic catalyst, easily synthesized from choline chloride and urea, is inexpensive, recyclable and bio-degradable, making it suitable for industrial applications. Springer Science+Business Media, LLC 2012.
Synthesis and characterization of thermally stable second-order nonlinear optical side-chain polyurethanes containing nitro-substituted oxadiazole and thiazole chromophores
Tasaganva,Tambe,Kariduraganavar
, p. 10 - 23 (2011/09/16)
We have newly synthesized nonlinear optical (NLO) active nitro-substituted thiazole and oxadiazole chromophores and condensed with tolylene-2,4- diisocyanate and 4,4′-methylenedi(phenyl isocyanate) to yield a series of polyurethanes. Molecular structural characterization of the resulting chromophores and polyurethanes was achieved by FTIR, UV-vis, 1H NMR and CHN elemental analyzer. The inherent viscosities (η inh) of polyurethanes measured with an Ubbelohde viscometer were in the range of 0.26-0.30 dl/g. Thermal behavior of polyurethanes was investigated using differential scanning calorimetry and thermogravimetric analysis. The glass transition temperatures (Tg) of the polyurethanes were in the range of 121-192 °C. Thin films of polyurethanes were prepared and achieved molecular orientation by inducing electric field. The change in the surface morphology of polyurethanes films before and after poling was investigated using atomic force microscopy. All the polyurethanes exhibited an excellent solubility in most of the common organic solvents, suggesting that these polyurethanes offered good processability. The second harmonic generation (SHG) coefficients (d33) of the poled polyurethanes ranged from 29.7 to 44.2 pm/V at 532 nm. High thermal endurance of the poled dipoles was observed for all the polyurethanes and this was attributed to the formation of extensive hydrogen bonds between urethane linkages. Furthermore, none of the developed polyurethanes showed SHG decay below 115 °C, and this signified their acceptability for nonlinear optical devices.
NOVEL 2,6-SUBSTITUTED-3-NITROPYRIDINE DERIVATIVE, METHOD FOR PREPARING SAME, AND PHARMACEUTICAL COMPOSITION INCLUDING SAME
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, (2012/01/03)
The present invention relates to a novel 2,6-substituted-3-nitropyridine derivative compound, a method for preparing the same, and a pharmaceutical composition including the same for prevention and treatment of osteoporosis. The 2,6-substituted-3-nitropyr
NOVEL 2,6-SUBSTITUTED-3-NITROPYRIDINE DERIVATIVE, METHOD FOR PREPARING SAME, AND PHARMACEUTICAL COMPOSITION INCLUDING SAME
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, (2012/01/03)
The present invention relates to a novel 2,6-substituted-3-nitropyridine derivative compound, a method for preparing the same, and a pharmaceutical composition including the same for prevention and treatment of osteoporosis. The 2,6-substituted-3-nitropyr
Efficient and expeditious synthesis of di- and trisubstituted thiazoles in PEG under catalyst-free conditions
Zhu, Dongjian,Chen, Jiuxi,Xiao, Huilong,Liu, Miaochang,Ding, Jinchang,Wu, Huayue
experimental part, p. 2895 - 2906 (2009/12/03)
An efficient and expeditious catalyst-free protocol was developed for the construction of di- and trisubstituted thiazoles from -haloketones and thioureas/thioamides in PEG. The reaction was carried out at ambient temperature, and the products were obtained in excellent isolated yields (91-98%). Additionally, PEG could be recovered easily and was reused without evident loss in activity.
An efficient, catalyst- and solvent-free synthesis of imidazo[1,2-a] pyridines and 2,4-disubstituted thiazoles on grinding
Zhu, Dongjian,Chen, Jiuxi,Wu, Dengze,Liu, Miaochang,Ding, Jinchang,Wu, Huayue
experimental part, p. 84 - 86 (2009/10/15)
An efficient synthesis of imidazo[1,2-a]pyridines and 2,4-disubstituted thiazoles in excellent yield under catalyst-and solvent-free conditions at room temperature on grinding has been developed. The important features of this method are that it is reasonably fast, very clean, high yielding, simple workup and environmentally benign.
Liquid-phase organic synthesis of thiazoles using poly(ethylene glycol)-bound sulfonyl chloride resin
Liu, Xiao-Ling,Wang, Qiu-Ying,Sheng, Shou-Ri,Xu, Chen,Cai, Ming-Zhong
, p. 3338 - 3345 (2008/12/22)
Reaction of poly(ethylene glycol) (PEG)-bound sulfonic acid with thionyl chloride formed difunctionalized PEG-bound sulfonyl chloride, which was treated with α-hydroxyketones, followed by treatment with thioamides in the presence of potassium carbonate, to afford thiazoles in good yields with a facile workup procedure. Copyright Taylor & Francis Group, LLC.
AZAINDOLE INHIBITORS OF AURORA KINASES
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Page/Page column 89, (2008/06/13)
The present invention relates to a compound represented by Formula (I): and pharmaceutically acceptable salts. Compounds of the present invention inhibit Aurora kinase, making them especially suitable for the treatment of a number of diseases, including s