- Synthesis of imidazo[1,2-: C] thiazoles through Pd-catalyzed bicyclization of tert-butyl isonitrile with thioamides
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Building new biological molecules is challenging. Herein, imidazo[1,2-c]thiazoles were synthesized as a new class of heterobicyclic analogs through Pd-catalyzed cascade bicyclization from isonitriles with thioamides. The bicyclic scaffolds were constructed by inserting three molecules of isonitrile into two molecules of thioamide and then cyclizing them in a one-pot procedure. In vitro antitumor studies of these new compounds were conducted by using the MTT assay, and compound 3c showed excellent inhibitory effects against HepG2 at 7.06 ± 0.68 μM.
- Peng, Xiangjun,Qin, Feng,Xu, Mengyue,Zhu, Shaojie,Pan, Yingming,Tang, Haitao,Meng, Xiujin,Wang, Hengshan
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supporting information
p. 8403 - 8407
(2019/09/30)
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- Design, synthesis and Structure-activity relationship studies of new thiazole-based free fatty acid receptor 1 agonists for the treatment of type 2 diabetes
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The free fatty acid receptor 1 (FFA1/GPR40) has attracted interest as a novel target for the treatment of type 2 diabetes. Several series of FFA1 agonists including TAK-875, the most advanced compound terminated in phase III studies due to concerns about liver toxicity, have been hampered by relatively high molecular weight and lipophilicity. Aiming to develop potent FFA1 agonists with low risk of liver toxicity by decreasing the lipophilicity, the middle phenyl of TAK-875 was replaced by 11 polar five-membered heteroaromatics. Subsequently, systematic exploration of SAR and application of molecular modeling, leads to the identification of compound 44, which was an excellent FFA1 agonist with robustly hypoglycemic effect both in normal and type 2 diabetic mice, low risks of hypoglycemia and liver toxicity even at the twice molar dose of TAK-875. Meanwhile, two important findings were noted. First, the methyl group in our thiazole series occupied a small hydrophobic subpocket which had no interactions with TAK-875. Furthermore, the agonistic activity revealed a good correlation with the dihedral angle between thiazole core and the terminal benzene ring. These results promote the understanding of ligand-binding pocket and might help to design more promising FFA1 agonists.
- Li, Zheng,Qiu, Qianqian,Xu, Xue,Wang, Xuekun,Jiao, Lei,Su, Xin,Pan, Miaobo,Huang, Wenlong,Qian, Hai
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supporting information
p. 246 - 257
(2016/03/08)
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- Cyclic diamine compound with 5-membered ring groups
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A compound of formula (1): wherein A is a single bond, C≡C, CONH or NHCO; W is a carbon atom or a nitrogen atom; X is CH, a nitrogen atom, an oxygen atom or a sulfur atom; Y is CH, CHR1, in which R1is a hydrogen atom, or a lower alkyl, hydroxy lower alkyl, lower alkoxy-lower-alkyl, aryl, aryl-lower-alkyl or heteroaryl-lower-alkyl group, a nitrogen atom, an oxygen atom, a sulfur atom or NR2, in which R2is a hydrogen atom, or a lower alkyl, hydroxy lower alkyl, lower alkoxy-lower-alkyl, aryl, aryl-lower-alkyl or heteroaryl-lower-alkyl group; Z is a nitrogen atom, an oxygen atom, a sulfur atom, CH or NR3, in which R3is a hydrogen atom, or a lower alkyl, hydroxy lower alkyl, lower alkoxy-lower-alkyl, aryl, aryl-lower-alkyl or heteroaryl-lower-alkyl group; m is 1 or 2; and n is a number of 1 to 5, with the proviso that one or two of W, X, Y and Z are heteroatoms; an acid-addition salt thereof, or a hydrate thereof. The compounds have inhibitory effects on cell adhesion and are useful for prevention or treatment of diseases such as allergy, asthma, rheumatism, arteriosclerosis and inflammation.
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- Superoxide radical inhibitor
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A superoxide radical inhibitor containing, as an effective ingredient, an azole derivative represented by the general formula (1), STR1 [wherein R1 represents a phenyl group which may have 1-3 lower alkoxy groups as substituent(s) on the phenyl ring, a phenyl group having a lower alkylenedioxy group, or the like; R2 represents a hydrogen atom, a phenyl group, a halogen atom, a lower alkoxycarbonyl group, a lower alkyl group, an amino-lower alkyl group which may have a lower alkyl group as a substituent, a dihydrocarbostyril group, or the like; R3 represents a group of the formula, STR2 (R4B represents a hydroxyl group, a carboxy group, a lower alkenyl group or a lower alkyl group. m represents 0, 1 or 2); X represents a sulfur atom or an oxygen atom] or a salt thereof.
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- Synthesis and Antitubercular Activity of 4-(5-Nitro-2-furyl/2-pyrazinyl/1-adamantyl)-2-(alkyl/aryl/arylamino)thiazoles
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The reaction of haloketones, obtained from Arndt-Eistert reaction on the acid chlorides of 1-adamantane, 5-nitrofuroic acid and pyrazine-2-carboxylic acid, with different thioamides and thioureas affords the title thiazoles (I-III).Some of them exhibit interesting antitubercular activity at 6.25 to 0.38 μg/ml concentration against H37Rv strain of M. tubercolosis in vitro testing.The structure activity relationship (SAR) has also been discussed.
- Khadse, B. G.,Lokhande, S. R.,Bhamaria, R. P.,Prabhu, S. R.
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p. 856 - 860
(2007/10/02)
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