Regiochemistry of mercury(II) oxide oxidation of unsymmetrical N,N-disubstituted hydroxylamines
作者:Sk.Asrof Ali、S.M. Azhar Hashmi、Mohammad N. Siddiqui、Mohammed I.M. Wazeer
DOI:10.1016/0040-4020(96)00904-0
日期:1996.11
Mercury(II) oxideoxidation of N,N-disubstituted hydroxylamines with the α and α′ carbon atoms containing one and two hydrogen atoms, respectively, gave aldonitrones in a highly regioselective manner. Removal of the α proton is involved in the rate determining step as shown by primary kinetic isotope effect.
(3 + 3) Cycloaddition of Oxyallyl Cations with Nitrones: Diastereoselective Access to 1,2-Oxazinanes
作者:Marie Cordier、Alexis Archambeau
DOI:10.1021/acs.orglett.8b00617
日期:2018.4.20
Oxyallylcations are prepared in situ from readily available α-tosyloxy ketones and act as transient electrophilic partners in (3 + 3) cycloaddition with nitrones. Under mild conditions, this method provides a chemoselective and diastereoselective route to polysubstituted 1,2-oxazinanes. A stepwise process is proposed to rationalize the diastereoselectivity of this transformation.
The stereoselectivity of some intermolecular nitronecycloadditions to alkenes featuring heterosubstituted allylic stereocenter is discussed and rationalized.
讨论并合理化了一些分子间的硝酮环加成物对具有杂取代的烯丙基立体中心的烯烃的立体选择性。
Enhanced asymmetric induction in cycloadditions to bridgehead-chiral vinyl dioxazaborocines
作者:Christopher D Davies、Stephen P Marsden、Elaine S.E Stokes
DOI:10.1016/s0040-4039(00)00571-2
日期:2000.5
Vinyl dioxazaborocines 5 with asymmetric centres on the nitrogen bridgehead substituent have been prepared and assayed in nitrile oxide and nitrone cycloadditions, giving asymmetricinductions of up to 70 and 74% ee, respectively.
[EN] BACTERIAL EFFLUX PUMP INHIBITORS<br/>[FR] INHIBITEURS DE POMPE À EFFLUX BACTÉRIEN
申请人:TAXIS PHARMACEUTICALS INC
公开号:WO2021243273A1
公开(公告)日:2021-12-02
Disclosed herein are compounds of formula I: (formula I) and salts thereof. Also disclosed are compositions comprising compounds of formula I and methods using compounds of formula I.