scope of aliphatic carboxylic anhydrides and tolerates synthetically useful aromatic substituents. Assisted by a redox system of pyridine N-oxide and zinc additives, the current reaction occurs under mild conditions and without the assistance of photocatalyst. Notably, this method features high chemoselectivity toward alkyl migration with mixed aliphatic/aromatic anhydrides. Thus, it provides a powerful
Mapping the Melatonin Receptor. 5. Melatonin Agonists and Antagonists Derived from Tetrahydrocyclopent[<i>b</i>]indoles, Tetrahydrocarbazoles and Hexahydrocyclohept[<i>b</i>]indoles
作者:David J. Davies、Peter J. Garratt、Derek A. Tocher、Stefan Vonhoff、John Davies、Muy-Teck Teh、David Sugden
DOI:10.1021/jm970246n
日期:1998.2.1
tetrahydrocarbazoles 2 (R = H) were mainly weak antagonists, while those with R = OMe were agonists. The biological behavior of the tetrahydrocarbazoles 9 (R = H) depended on R1, some being agonists and someantagonists, whereas those with R = OMe were generally agonists. Variation of the R and R1 groups in compounds of type 9 produced both agonists and antagonists. The tetrahydrocylopentaindoles 10 had similar
[EN] PYRIMIDO [4,5-B]QUINOLINE-4,5 (3H,10H)-DIONES AS NONSENSE MUTATION SUPPRESSORS<br/>[FR] PYRIMIDO [4,5-B]QUINOLINE-4,5 (3H,10H)-DIONES UTILISÉS EN TANT QUE SUPPRESSEURS DE MUTATION NON-SENS
申请人:NOVARTIS AG
公开号:WO2014091446A1
公开(公告)日:2014-06-19
The invention relates to compound of the formula (I); or a salt thereof, wherein the substituents are as defined in the specification; to its preparation, to its use as medicament and to medicaments comprising it.
The present invention provides substituted berbines, processes for the synthesis of substituted berbine compounds, as well as intermediates used in the synthesis of substituted berbine compounds. Also provided are methods for using the substituted berbines to inhibit cancer cell growth.
Nickel-Catalyzed Three-Component Reductive Alkylacylation of Electron-Deficient Activated Alkenes
作者:Lin Wang、Chuan Wang
DOI:10.1021/acs.orglett.0c03210
日期:2020.11.20
alkylacylation of electron-deficient activated alkenes with tertiary alkyl bromides and acid anhydrides. This method enables the efficient preparation of a variety of ketones with broad substrate scope and high functionality tolerance starting from simple precursors. On the basis of the preliminary mechanistic investigations, a catalytic cycle involving the synergistic interaction of nickel, zinc, and MgCl2