一些基于(苯并[ d ]噻唑-2-基)-1-苯基甲胺衍生物的新型抑制剂被设计用于减少阿尔茨海默病的聚集过程。这些结构似乎模仿了二苯乙烯样支架,而苯并噻唑部分“锁定”了硫黄素 T 结合位点。其他抑制剂是基于2-((苯并[ d ]噻唑-2-基亚氨基)甲基)-5-(苄氧基)-1-甲基吡啶-4(H)-酮衍生物设计的。
Organocatalytic asymmetric [4+2] cyclization of 2-benzothiazolimines with azlactones: access to chiral benzothiazolopyrimidine derivatives
作者:Qijian Ni、Xuyang Wang、Fangfang Xu、Xiaoyun Chen、Xiaoxiao Song
DOI:10.1039/d0cc00736f
日期:——
An organocatalytic asymmetricdomino Mannich/cyclization reaction between 2-benzothiazolimines with azlactones has been successfully developed. With the bifunctional squaramide catalyst, this formal [4+2] cyclization occurs with good to high yields and excellent stereoselectivities (up to 99% ee, >20 : 1 dr), providing an efficient and mild access to chiral benzothiazolopyrimidines bearing adjacent
NHC-Catalyzed aerobicoxidativereactions of imines and aldehydes have been developed by using sodium pyruvate as a novel and efficient peroxide scavenger. A structurally diverse set of imidates and amidines has been prepared fromimines using this strategy. This general and efficient strategy features the use of sodium pyruvate as a novel and efficient peroxide scavenger and ambient air as the sole
Development of 1,3-thiazole analogues of imidazopyridines as potent positive allosteric modulators of GABAA receptors
作者:Tatyana A. Tikhonova、Irina V. Rassokhina、Eugeny A. Kondrakhin、Mikhail A. Fedosov、Julia V. Bukanova、Alexey V. Rossokhin、Irina N. Sharonova、Georgy I. Kovalev、Igor V. Zavarzin、Yulia A. Volkova
DOI:10.1016/j.bioorg.2019.103334
日期:2020.1
of imidazopyridine drugs (Zolpidem, Alpidem). Three series of novel γ-aminobutyric acid receptor (GABAAR) ligands belonging to imidazo[2,1-b]thiazoles, imidazo[2,1-b][1,3,4]thiadiazoles, and benzo[d]imidazo[2,1-b]thiazoles were synthesized and characterized as active agents against GABAAR benzodiazepine-binding site. In each of these series, potent compounds were discovered using a radioligand competition
Organocatalytic Asymmetric Synthesis of Benzothiazolopyrimidines via [4 + 2] Cyclization of 2-Benzothiazolimines and Aldehydes
作者:Xue-Ping Chen、Ke-Qiang Hou、Feng Zhou、Albert S. C. Chan、Xiao-Feng Xiong
DOI:10.1021/acs.joc.0c02499
日期:2021.1.15
We report the direct asymmetric synthesis of pyrimido[2,1-b]benzothiazoles using a commercially available chiral amine catalyst. A variety of 2-benzothiazolimines and aldehydes were well tolerated under the reaction conditions and generated the corresponding products in 81–99% yields with excellent diastereoselectivities and enantioselectivities (up to >20:1 dr, 99% ee). Furthermore, the products could
我们报告了使用市售手性胺催化剂的嘧啶并[2,1- b ]苯并噻唑的直接不对称合成。在反应条件下,各种2-苯并噻唑啉和醛均具有良好的耐受性,并以81-99%的收率生成了相应的产物,具有非对映选择性和对映选择性(最高> 20:1 dr,99%ee)。此外,产品可以轻松转换为其他有用的手性构件。
Synthesis of Imidazo[2,1-<i>b</i>]thiazoles via Copper-Catalyzed A<sup>3</sup>-Coupling in Batch and Continuous Flow
作者:Irina V. Rassokhina、Tatyana A. Tikhonova、Sergey G. Kobylskoy、Igor Yu. Babkin、Valerii Z. Shirinian、Vladimir Gevorgyan、Igor V. Zavarzin、Yulia A. Volkova
DOI:10.1021/acs.joc.7b01762
日期:2017.9.15
A straightforward method for the synthesis of functionalized imidazo[2,1-b]thiazoles starting from benzaldehydes, 2-aminothiazoles, and alkynes under copper(I,II) catalysis was developed. The protocol allows the construction of a variety of aryl-substituted imidazo[2,1-b]benzothiazoles, -[2,1-b]thiazoles, and -[2,1-b][1,3,4]thiadiazoles. The reactions were easy to perform affording most of the desired
开发了一种简单的方法,在铜(I,II)催化下,从苯甲醛,2-氨基噻唑和炔烃开始合成官能化的咪唑并[ 2,1- b ]噻唑。该协议允许构建各种芳基取代的咪唑并[2,1- b ]苯并噻唑,-[2,1- b ]噻唑和-[2,1- b ] [1,3,4]噻二唑。反应易于进行,以33–93%的收率提供了大多数所需的产物。在连续流反应器中工艺的强化将产品的收率提高到定量。