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。
Access to Amide from Aldimine via Aerobic Oxidative Carbene Catalysis and LiCl as Cooperative Lewis Acid
作者:Guanjie Wang、Zhenqian Fu、Wei Huang
DOI:10.1021/acs.orglett.7b01195
日期:2017.7.7
Herein, an efficient route to amides from aldimines via aza-Breslow intermediates through aerobic oxidative carbenecatalysis with LiCl as a cooperative Lewis acid is described. Many of the obtained N-heteroarylamides feature biological activity. Ambient air was used as the sole oxidant and source of oxygen in this catalytically oxidative amidation. This method allows for a broad substrate scope and
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
Rational Design of Axially Chiral Styrene‐Based Organocatalysts and Their Application in Catalytic Asymmetric (2+4) Cyclizations
作者:Si‐Jia Liu、Zhi‐Han Chen、Jia‐Yi Chen、Shao‐Fei Ni、Yu‐Chen Zhang、Feng Shi
DOI:10.1002/anie.202112226
日期:2022.2.7
A new class of axiallychiral styrene-based organocatalysts has been rationally designed. They enable the chemo-, diastereo- and enantioselective (2+4) cyclization of 2-benzothiazolimines. This work represents the first design of styrene-based chiral thiourea tertiary amine catalysts and the first catalyticasymmetric (2+4) cyclization of 2-benzothiazolimines, and it gives an in-depth understanding
Organocatalytic Enantioselective Strecker Reaction of Imines Containing a Thiazole Moiety by Using a Cinchona-Based Squaramide Catalyst
作者:Hai-Xiao He、Da-Ming Du
DOI:10.1002/ejoc.201402764
日期:2014.10
organocatalytic enantioselective Strecker reaction was developed for the synthesis of α-amino nitriles that contain a thiazole moiety by using a cinchona-based squaramide catalyst. The corresponding products were obtained in good to excellent yields (up to 99 %) with excellent enantioselectivities (up to 98 % ee) by starting from aromatic-substituted imines. In addition, two trifunctional squaramides