399-07-5Relevant academic research and scientific papers
Iodine-mediated multi-component reactions: Readily access to tetrazoles and guanidines
Kammela, Prasad Rao,Seelam, Mohan,Shaik, Bajivali,Tamminana, Ramana
, p. 382 - 388 (2021/09/07)
Environmentally benign syntheses of One-pot sequential reactions of benzoyl chloride with amines followed by the treatment of molecular I2 reagent under basic conditions provide benzoyl tetrazoles and guanidines in moderate to excellent yields. This one-pot synthesis has several advantages such as mild reaction conditions, short reaction time, convenient workup, high yields, using cheap and readily available reagent molecular Iodine. In addition, functional group tolerance has been explored.
N, N′ N″-trisubstituted guanidines: Synthesis, characterization and evaluation of their leishmanicidal activity
do Espírito Santo, Rafael Dias,Velásquez, ángela María Arenas,Passianoto, Luana Vitorino Gushiken,Sepulveda, Alex Arbey Lopera,da Costa Clementino, Leandro,Assis, Renata Pires,Baviera, Amanda Martins,Kalaba, Predrag,dos Santos, Fábio Neves,éberlin, Marcos Nogueira,da Silva, Gil Valdo José,Zehl, Martin,Lubec, Gert,Graminha, Márcia Aparecida Silva,González, Eduardo René Pérez
, p. 116 - 128 (2019/03/26)
Leishmaniasis is a group of diseases caused by protozoan parasites from the genus Leishmania. There are estimated 1.3 million new cases annually with a mortality of 20,000–30,000 per year, when patients are left untreated. Current chemotherapeutic drugs available present high toxicity and low efficacy, the latter mainly due to the emergence of drug-resistant parasites, which makes discovery of novel, safe, and efficacious antileishmanial drugs mandatory. The present work reports the synthesis, characterization by ESI-MS, 1H and 13C NMR, and FTIR techniques as well as in vitro and in vivo evaluation of leishmanicidal activity of guanidines derivatives presenting lower toxicity. Among ten investigated compounds, all being guanidines containing a benzoyl, a benzyl, and a substituted phenyl moiety, LQOF-G2 (IC50-ama 5.6 μM; SI = 131.8) and LQOF-G7 (IC50-ama 7.1 μM; SI = 87.1) were the most active against L. amazonensis intracellular amastigote, showing low cytotoxicity to the host cells according to their selectivity index. The most promising compound, LQOF-G2, was further evaluated in an in vivo model and was able to decrease 60% of the parasite load in foot lesions at a dose of 0.25 mg/kg/day. Moreover, this guanidine derivative demonstrated reduced hepatotoxicity compared to other leishmanicidal compounds and did not show nephrotoxicity, as determined by the analyses of biomarkers of hepatic damage and renal function, which make this compound a potential new hit for therapy against leishmaniasis.
Synthesis, SAR and docking studies of substituted aryl phenylthiazolyl phenylcarboxamide as potential protein tyrosine phosphatase 1B (PTP1B) inhibitors
Varshney, Kanika,Gupta, Amit K.,Rawat, Arun,Srivastava, Rohit,Mishra, Akansha,Saxena, Mridula,Srivastava, Arvind K.,Jain, Sudha,Saxena, Anil K.
, p. 1378 - 1389 (2019/06/24)
In our continued effort to discover novel PTP1B inhibitor with improved in vivo activity, we attempted to optimize our previously discovered lead compound by replacing the sulfonyl group with benzoyl group to yield compound II. Additional structural modif
Discovery of Novel Thiazol-2-Amines and Their Analogues as Bioactive Molecules: Design, Synthesis, Docking and Biological Evaluation
Verma, Anil Kumar,Bishnoi, Abha,Fatma, Shaheen,Parveen, Huda,Singh, Vineeta
, p. 222 - 231 (2018/04/10)
A simple and highly efficient procedure for the synthesis of novel thiazol-2-amines, via Mannich reaction with secondary amines, is described. The newly synthesized derivatives 8(a-e) and 9(a-e) were characterized by 1 H NMR, 13 C NMR, IR, Mass spectroscopy and elemental analysis. All the derivatives were evaluated for their in-vitro anti-microbial activity against a panel of pathogenic strains of bacteria and fungi. The SAR showed that the secondary amines had a significant impact on the in-vitro antimicrobial activity of this class of agents. The most potent analogue N-((1H-benzo[d]imidazol-1-yl)methyl)-N-(2(trifluoromethyl)phenyl)-4,5-dihydrothiazol-2-amine (8c) showed excellent inhibition with MIC (zoi) 6.25 (22.5), 25 (21.5) and 25 (18) μg/mL against E. coli, S. typhi and P. aeruginosa respectively as compared to the standard drug. Molecular docking results suggest that compound exhibited inhibitory activity by binding of the title compound within the active sites of the inhibiting Enoyl ACP reductase, Lipid A, Pyridoxal kinase and type I DHQase enzymes. The compound exhibited promising anti-microbial activity which can be further explored as potential lead for the development of cheaper, safe, effective and potent drugs against resistant microbial parasites.
Synergism of fused bicyclic 2-aminothiazolyl compounds with polymyxin B against: Klebsiella pneumoniae
Wang, Rong,Hou, Shuang,Dong, Xiaojing,Chen, Daijie,Shao, Lei,Qian, Liujia,Li, Zhong,Xu, Xiaoyong
, p. 2060 - 2066 (2017/11/22)
A series of fused bicyclic 2-aminothiazolyl compounds were synthesized and evaluated for their synergistic effects with polymyxin B (PB) against Klebsiella pneumoniae (SIPI-KPN-1712). Some of the synthesized compounds exhibited synergistic activity. When 4 μg ml-1 compound B1 was combined with PB, it showed potent antibacterial activity, achieving 64-fold reduction of the MIC of PB. Furthermore, compound B1 showed prominent synergistic efficacy in both concentration gradient and time-kill curves in vitro. In addition, B1 combined with PB also exhibited synergistic and partial synergistic effect against E. coli (ATCC25922 and its clinical isolates), Acinetobacter baumannii (ATCC19606 and its clinical isolates), and Pseudomonas aeruginosa (Pae-1399).
A NO donor type he Augmentin derivatives, preparation method and application (by machine translation)
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Paragraph 0078-0080, (2017/08/31)
The invention provides a having the general formula (I) as shown in the structural formula of the compound, the compound has better NO release of the active, with better prospect of application, can be used for anti-inflammatory, anti-thrombotic, anti-platelet activity, reducing cholesterol and triglyceride levels and/or improve the high density lipoprotein levels, treatment of peripheral ischemia, diabetic vascular complications in or atherosclerosis. The invention also provides a method for preparing said compound. (by machine translation)
Synthesis and antitumor evaluation of 5-(benzo[: D] [1,3]dioxol-5-ylmethyl)-4-(tert -butyl)- N -arylthiazol-2-amines
Wu,Fang,Tang,Xiao,Ye,Li,Hu
, p. 1768 - 1774 (2016/09/28)
A series of novel N-aryl-5-(benzo[d][1,3]dioxol-5-ylmethyl)-4-(tert-butyl)thiazol-2-amines (C1-C31) were synthesized and evaluated for their antitumor activities against HeLa, A549 and MCF-7 cell lines. Some tested compounds showed potent growth inhibition properties with IC50 values generally below 5 μM against the three human cancer cells lines. Compound C27 showed potent activities against HeLa and A549 cell lines with IC50 values of 2.07 ± 0.88 μM and 3.52 ± 0.49 μM, respectively. Compound C7 (IC50 = 2.06 ± 0.09 μM) was the most active compound against A549 cell line, while compound C16 (IC50 = 2.55 ± 0.34 μM) showed the best inhibitory activity against the MCF-7 cell line. The preliminary mechanism of the inhibitory effect was investigated via further experiments, such as morphological analysis by dual AO/EB staining and Hoechst 33342 staining, and cell apoptosis and cycle assessment by FACS analysis. The results illustrated that compound C27 could induce apoptosis and cause both S-phase and G2/M-phase arrests in HeLa cell line. Therefore, compound C27 could be developed as a potential antitumor agent.
Synthesis of new 2-aminoimidazolones with antiproliferative activity via base promoted amino-β-lactam rearrangement
Dra?i?, Tonko,Vazdar, Katarina,Vazdar, Mario,Crossed D Signakovi?, Marijana,Mikecin, Ana-Matea,Kralj, Marijeta,Malnar, Martina,He?imovi?, Silva,Habu?, Ivan
, p. 9202 - 9215 (2015/11/27)
A facile and efficient transformation of amino-β-lactam guanidines to 2-aminoimidazolones is described. The base-promoted transformation proceeds in two steps, with the rearrangement of four-membered β-lactam ring to five-membered imidazolone and subsequent E1cB elimination and formation of double bond at the 4-position of imidazolone ring, which is supported with quantum chemical calculations. The benzoylaminoimidazolone and 2-aminoimidazolone products are obtained in high yields. The benzoylaminoimidazolone products show antiproliferative activity in HCT116 (colon carcinoma) and H460 (lung carcinoma) cell lines.
Antitubercular activities of the novel synthesized 1,2,4-triazole derivatives
Oh, Taegwon,Hayat, Aisal,Yoo, Euna,Cho, Sang-Nae,Sheen, Yhun Yhung,Kim, Dae-Kee,Choo, Hea-Young Park
, p. 43 - 51 (2015/03/04)
1,2,4-Triazoles exert antimycobacterial activity by inhibiting the cell wall biosynthesis. In an attempt to developing lead compounds exhibiting antitubercular activities, a series of 1,2,4-triazole derivatives were synthesized by introducing various substitutes into a scaffold and the antitubercular activity was evaluated. The most potent compounds 3e and 8d showed their minimum inhibitory concentrations against Mycobacterium tuberculosis as 12.5 ??M. The results indicate that those compounds can be considered as leads for further development of new 1,2,4-triazole type candidates with high antitubercular activities.
Multi-dimensional target profiling of N,4-diaryl-1,3-thiazole-2-amines as potent inhibitors of eicosanoid metabolism
R?dl, Carmen B.,Vogt, Dominik,Kretschmer, Simon B.M.,Ihlefeld, Katja,Barzen, Sebastian,Brüggerhoff, Astrid,Achenbach, Janosch,Proschak, Ewgenij,Steinhilber, Dieter,Stark, Holger,Hofmann, Bettina
, p. 302 - 311 (2014/08/05)
Eicosanoids like leukotrienes and prostaglandins play a considerable role in inflammation. Produced within the arachidonic acid (AA) cascade, these lipid mediators are involved in the pathogenesis of pain as well as acute and chronic inflammatory diseases like rheumatoid arthritis and asthma. With regard to the lipid cross-talk within the AA pathway, a promising approach for an effective anti-inflammatory therapy is the development of inhibitors targeting more than one enzyme of this cascade. Within this study, thirty N-4-diaryl-1,3-thiazole-2- amine based compounds with different substitution patterns were synthesized and tested in various cell-based assays to investigate their activity and selectivity profile concerning five key enzymes involved in eicosanoid metabolism (5-, 12-, 15-lipoxygenase (LO), cyclooxygenase-1 and -2 (COX-1/-2)). With compound 7, 2-(4-phenyl)thiazol-2-ylamino)phenol (ST-1355), a multi-target ligand targeting all tested enzymes is presented, whereas compound 9, 2-(4-(4-chlorophenyl)thiazol-2-ylamino)phenol (ST-1705), represents a potent and selective 5-LO and COX-2 inhibitor with an IC50 value of 0.9 ± 0.2 μM (5-LO) and a residual activity of 9.1 ± 1.1% at 10 μM (COX-2 product formation). The promising characteristics and the additional non-cytotoxic profile of both compounds reveal new lead structures for the treatment of eicosanoid-mediated diseases.
