开发了镍催化的反应用于合成多官能化的吲哚。该反应通过Ni(0)/ P ^ N配合物与烯炔体系2-炔基苯胺基丙烯酸丙烯酸酯的氧化环化而进行,以提供镍环中间体。该反绕内炔-carboamination通过实现顺/反通过C-N键形成还原消去形成所述Ni基卡宾中间体由nickelacycle的C-N键断裂形成的,和3-链烯基吲哚的-rotation。值得注意的是,合成的吲哚可以成功地转化为官能化的咔唑。
Palladium-Catalyzed Allenamide Carbopalladation/Allylation with Active Methine Compounds
作者:Xiaoyi Zhu、Ruibo Li、Hequan Yao、Aijun Lin
DOI:10.1021/acs.orglett.1c01369
日期:2021.6.18
carbopalladation/allylation with active methine compounds has been developed. Various indoles and isoquinolinones bearing a quaternary carbon center were achieved with good efficiency, a broad substrate scope and good functional group tolerance. This reaction underwent cascade oxidative addition, carbopalladation, and allylicalkylation, and two new C–C bonds were formed in one pot.
Asymmetric Counteranion Directed Catalytic Heck/Tsuji–Trost Annulation of Aryl Iodides and 1,3-Dienes
作者:Jia-Cheng Xu、Yi-Zhuo Yin、Zhi-Yong Han
DOI:10.1021/acs.orglett.1c00910
日期:2021.5.21
anion-mediated asymmetric Heck/Tsuji–Trost reaction of aryliodides and 1,3-dienes is presented. Chiral indoline derivatives could be afforded with remarkably higher yields and enantioselectivities than our previous chiral ligand-based method. Silver carbonate is employed as both base and halide scavenger to ensure fast and recyclable exchange of the catalytic amount of chiral anions. Fast salt metathesis,
A new strategy for the convergent synthesis of the ABCD ring system of indole terpene alkaloids has been developed based on a Sonogashira coupling of an o-iodoaniline (the A ring) with an alkyne bearing the D ring. After a tandem palladium-catalyzedcyclization, the tetracyclic ABCD ring structure found in the terpene indole alkaloids was obtained in good yield.
基于邻碘苯胺(A 环)与带有 D 环的炔烃的 Sonogashira 偶联,开发了一种用于聚合合成吲哚萜烯生物碱 ABCD 环系统的新策略。在串联钯催化环化后,以良好的产率获得了萜烯吲哚生物碱中发现的四环 ABCD 环结构。
GLP-1R agonists and uses thereof
申请人:QILU REGOR THERAPEUTICS INC.
公开号:US10844049B2
公开(公告)日:2020-11-24
The invention described herein provides compounds of Formula (I) and pharmaceutical compositions thereof,
for use in, e.g. treating type 2 diabetes mellitus, pre-diabetes, obesity, non-alcoholic fatty liver disease, non-alcoholic steatohepatitis, and cardiovascular disease.
Tandem Sonogashira-Hagihara Coupling/Cycloisomerization Reactions of Ethynylboronic Acid MIDA Ester to Afford 2-Heterocyclic Boronic Acid MIDA Esters: A Concise Route to Benzofurans, Indoles, Furopyridines and Pyrrolopyridines
作者:Yohji Sakurai
DOI:10.3987/com-17-13723
日期:——
A one-pot process that provides direct access to 2-heterocyclic MIDA (N-methyliminodiacetic acid) boronates has been developed. The reaction of 2-iodophenols or 2-iodoanilines with ethynylboronic acid MIDA ester readily afforded 2-substituted heterocyclic compounds. Amidine and phosphazene bases, especially TMG (1,1,3,3-tetramethylguanidine) assumed an important role in the tandem Sonogashira-Hagihara coupling/cycloisomerization reactions.