Hydrogen peroxide based oxidation of hydrazines using HBr catalyst
作者:Jian Wang、Zichao Ma、Wanting Du、Liming Shao
DOI:10.1016/j.tet.2021.132546
日期:2021.12
Azo compounds (RN = NR′) are an important class of organic molecules that find wide application in organic synthesis. Herein, we report an efficient, practical and metal-free oxidation of hydrazines (RNH-NHR’) to azo compounds using 5 mol% HBr and hydrogen peroxide as terminal oxidant. This new method has been demonstrated by 40 examples with excellent yields. In addition, we showcased two examples
[EN] TACHYKININ RECEPTOR ANTAGONISTS<br/>[FR] ANTAGONISTES DU RECEPTEUR TACHYKININE
申请人:LILLY CO ELI
公开号:WO2005000821A1
公开(公告)日:2005-01-06
The present invention relates to selective NK-1 receptor antagonists of Formula (I) or a pharmaceutically acceptable salt thereof, for the treatment of disorders associated with an excess of tachykinins.
Pyrazolones as inhibitors of 11B-hydroxysteroid dehydrogenase
申请人:Banner Lester Bruce
公开号:US20070049632A1
公开(公告)日:2007-03-01
Provided herein are compounds of the formula (I):
as well as pharmaceutically acceptable salts thereof, wherein the substituents are as those disclosed in the specification. These compounds, and the pharmaceutical compositions containing them, are useful for the treatment of diseases such as, for example, type II diabetes mellitus and metabolic syndrome.
Microwave‐Assisted Rapid One‐Pot Synthesis of Fused and Non‐Fused Indoles and 5‐[
<sup>18</sup>
F]Fluoroindoles from Phenylazocarboxylates
作者:Jasmin Krüll、Anja Hubert、Natascha Nebel、Olaf Prante、Markus R. Heinrich
DOI:10.1002/chem.201703890
日期:2017.11.16
On the fast track: Phenylazocarboxylates can be converted to indoles via a rapid one-pot reaction comprising a microwave-assisted Fischer indole synthesis. The advantage that phenylazocarboxylates can beforehand be modified by mild nucleophilic aromatic substitution also enables an application of the strategy for the preparation of 5-[18F]fluoroindoles.
Synthesis of Cinnolines and Cinnolinium Salt Derivatives by Rh(III)-Catalyzed Cascade Oxidative Coupling/Cyclization Reactions
作者:Yanwei Wang、Bin Li、Baiquan Wang
DOI:10.1021/acs.joc.8b01548
日期:2018.9.21
A novel method for the synthesis of cinnolines and cinnolinium salt derivatives via Rh(III)-catalyzed cascade oxidative coupling/cyclizationreaction from Boc-arylhydrazines and alkynes has been developed. The reactions have a broad substrate scope and high stereoselectivity with readily available starting materials and provides an efficient synthetic route for this kind of compounds. A catalytically