The effects of cyclic terminal groups in 4-aminoazobenzene and related azo dyes. Part 3. Electronic absorption spectra of some monoazo dyes derived from N-phenylmorpholine, N-(phenyl)thiomorpholine, N-(phenyl)thiomorpholine 1,1-dioxide, and N-acetyl-N′-phenylpiperazine
作者:Geoffrey Hallas、Richard Marsden、John D. Hepworth、Donald Mason
DOI:10.1039/p29860000123
日期:——
Monoazo dyes containing a terminal morpholino group absorb hypsochromically in comparision with their piperidino counterparts as a result of electron withdrawal by the oxygen atom. Similar shifts are observed with related dyes possessing other γ-heteroatoms in the donor group. In acid solution, protonation takes place at the β-azo nitrogen atom (azonium tautomer) and at the terminal nitrogen atom (ammonium
N-aryl-2-oxazolidinone-5-carboxamides and their derivatives
申请人:——
公开号:US20040147760A1
公开(公告)日:2004-07-29
The present invention provides antibacterial agents having the formulae I, II, and III described herein.
本发明提供了具有以下式I、II和III的抗菌剂。
Chan–Evans–Lam Amination of Boronic Acid Pinacol (BPin) Esters: Overcoming the Aryl Amine Problem
作者:Julien C. Vantourout、Robert P. Law、Albert Isidro-Llobet、Stephen J. Atkinson、Allan J. B. Watson
DOI:10.1021/acs.joc.6b00466
日期:2016.5.6
The Chan–Evans–Lam reaction is a valuable C–N bond forming process. However, aryl boronic acidpinacol (BPin) ester reagents can be difficult coupling partners that often deliver low yields, in particular in reactions with aryl amines. Herein, we report effective reaction conditions for the Chan–Evans–Lam amination of aryl BPin with alkyl and aryl amines. A mixed MeCN/EtOH solvent system was found
[EN] N-ARYL-2-OXAZOLIDINONE-5-CARBOXAMIDES AND THEIR DERIVATIVES AND THEIR USE AS ANTIBACTERIALS<br/>[FR] N-ARYL-2-OXAZOLIDINONE-5-CARBOXAMIDES ET LEURS DERIVES ET UTILISATION DE CES COMPOSES COMME ANTIBACTERIENS
申请人:UPJOHN CO
公开号:WO2003072553A1
公开(公告)日:2003-09-04
Compounds of formula B-C-A-CO-NH-R1, wherein A is structure i, ii or iii: formulae (I), (II), (III). C is optionally substituted aryl or heteroaryl, and B is a specified cyclic moiety, or C and B together are a heterobicyclic moiety, are useful as antibacterial agents.
Spectroscopic Studies of the Chan–Lam Amination: A Mechanism-Inspired Solution to Boronic Ester Reactivity
作者:Julien C. Vantourout、Haralampos N. Miras、Albert Isidro-Llobet、Stephen Sproules、Allan J. B. Watson
DOI:10.1021/jacs.6b12800
日期:2017.4.5
of amine and organoboron reactivity issues, and the origin of competing oxidation/protodeboronation side reactions. Identification of key mechanistic events has allowed the development of a simple solution to these issues: manipulating Cu(I) → Cu(II) oxidation and exploiting three synergistic roles of boric acid has allowed the development of a general catalytic Chan-Lam amination, overcoming long-standing