Structure-Based Design, Synthesis, and Biological Evaluation of New Triazolo[1,5-<i>a</i>]Pyrimidine Derivatives as Highly Potent and Orally Active ABCB1 Modulators
ABCB1 is a promising therapeutic target for overcoming multidrug resistance (MDR). In this work, we reported the structure-based design of triazolo[1,5-a]pyrimidines as new ABCB1 modulators, of which WS-691 significantly increased sensitization of ABCB1-overexpressed SW620/Ad300 cells to paclitaxel (PTX) (IC50 = 22.02 nM). Mechanistic studies indicated that WS-691 significantly increased the intracellular
Brønsted Acid‐Catalyzed Direct C(
<i>sp</i>
<sup>2</sup>
)−H Heteroarylation Enabling the Synthesis of Structurally Diverse Biaryl Derivatives
作者:Shuo Yuan、Bin Yu、Hong‐Min Liu
DOI:10.1002/adsc.201801226
日期:2019.1.11
that enables the synthesis of biaryl fragments (70 examples) in moderate to excellent yields (up to 99% yield), which was also performed at a gram scale and successfully applied to the privileged quinazoline scaffolds of the first‐generation epidermal growth factor receptor (EGFR) inhibitors Gefitinib and Erlotinib, offering rapid access to a series of quinazoline‐basedbiarylcompounds. Additionally
Experience-based discovery (EBD) of aryl hydrazines as new scaffolds for the development of LSD1/KDM1A inhibitors
作者:Zhong-Rui Li、Shuai Wang、Linlin Yang、Xiao-Han Yuan、Feng-Zhi Suo、Bin Yu、Hong-Min Liu
DOI:10.1016/j.ejmech.2019.01.075
日期:2019.3
binding region and therefore blocked the access of the peptide substrate to the FAD, finally leading to the demethylase activity inhibition of LSD1. The findings indicate that aryl hydrazines are newscaffolds for the design of LSD1 inhibitors, the identification of D8 provides further evidence for our previously proposed general principle that fused heterocycles with an amine group are potentially active
On triazoles.<b>VIII</b>The reaction of 5-amino-1,2,4-triazoles with ethyl 2-cyano-3-ethoxyacrylate and 2-cyano-3-ethoxyacrylonitrile
作者:József Reiter、László Pongó、Péter Dvortsák
DOI:10.1002/jhet.5570240443
日期:1987.7
The reaction of different 5-amino-3-Q-1H-1,2,4-triazoles 1 with ethyl2-cyano-3-ethoxyacrylate (5a) and 2-cyano-3-ethoxyacrylonitrile (5b) to yield either the a type 5-amino-, or the b type 7-amino-1,2,4-triazolo[1,5-a]-pyrimidine derivatives 6–10 was studied. The structure of compounds 6 and 9 was proved by their degradation to the corresponding derivatives 17a and 18a, respectively, through intermediates
不同的5-氨基-3-Q-1 H -1,2,4-三唑1与2-氰基-3-乙氧基丙烯酸乙酯(5a)和2-氰基-3-乙氧基丙烯腈(5b)反应生成研究了5-氨基-或b型7-氨基-1,2,4-三唑并[1,5- a ]-嘧啶衍生物6-10。化合物6和9的结构分别通过中间体11a,12a,13a,14a,15a和16a降解为相应的衍生物17a和18a来证明。, 分别。分别根据其uv光谱分别与6a和9a的uv光谱相似,证明了衍生物7、8和10的结构。中间体19和20的分离有助于证明导致分别形成6a和9a的反应机理。在N-取代的5-氨基-1,2,4-三唑与5a的反应中,未形成预期的稠环产物。相反,获得了氨基丙烯酸酯22和24。“ Z ”-“ E”衍生物的异构体结构19,20,22和24,用它们的质子核磁共振光谱的帮助下证实。热力学稳定的22的“ Z ”异构体结构也借助于其质子耦合的cmr光谱得到证实。
Synthesis and fungicidal activity of phenazine-1-carboxylic triazole derivatives
displayed very strong fungicidalactivity against one or multiple plant pathogens in vitro and in vivo. Compounds 8b, 8h, and 8i showed a broad spectrum of fungicidalactivity. Further field experiments indicated that compounds 8b, 8c, and 8h displayed better efficacy against rice blast (Pyricularia oryzae) than PCA. These data demonstrate that compounds 8b, 8c, and 8h are promising fungicidal candidates, deserving