[EN] AMIDINE SUBSTITUTED BETA - LACTAM COMPOUNDS, THEIR PREPARATION AND USE AS ANTIBACTERIAL AGENTS [FR] COMPOSÉS DE BÊTA-LACTAME À SUBSTITUTION AMIDINE, LEUR PRÉPARATION ET LEUR UTILISATION EN TANT QU'AGENTS ANTIBACTÉRIENS
The effects of 2-phthalimidooxyalkanoic acid derivatives on the germination and root-growth of cress were examined. Since 2-phthalimidooxypropionates were most effective, the optically active ethyl esters were prepared. As the result of biological testing, the (S)-(-)-isomer exhibited stronger activity than the (R)-(+)-isomer. This result is contrary to those from commercial herbicides with similar structures, phenoxy- and oxyphenoxy-propionate-type compounds, where the (R)-isomers are generally known to be the active principles.
Metal-Free Cross-Dehydrogenative C–O Coupling of Carbonyl Compounds with <i>N</i>-Hydroxyimides: Unexpected Selective Behavior of Highly Reactive Free Radicals at an Elevated Temperature
作者:Igor B. Krylov、Elena R. Lopat’eva、Alexander S. Budnikov、Gennady I. Nikishin、Alexander O. Terent’ev
DOI:10.1021/acs.joc.9b02656
日期:2020.2.21
N-hydroxyphthalimide drastically affects the oxidative properties of t-BuOOt-Bu by intercepting the t-BuO• radicals with the formation of phthalimide-N-oxyl radicals, a species responsible for both hydrogen atom abstraction from the CH reagent and the selective formation of the C-O coupling product by selective radical cross-recombination. The practical applicability of the developed method was exemplified by the
AMIDINE SUBSTITUTED BETA-LACTAM COMPOUNDS, THEIR PREPARATION AND USE AS ANTIBACTERIAL AGENTS
申请人:AiCuris GmbH & Co. KG
公开号:US20150045340A1
公开(公告)日:2015-02-12
The present invention relates to novel β-lactam compounds, their preparation and use. In particular, this invention relates to novel β-lactam compounds which are amidine substituted monobactam derivatives useful as antimicrobial agents and their preparation.
Iminoacylation of Alkenes via Photoredox N-Heterocyclic Carbene Catalysis
作者:Yi-Xiong Dong、Chun-Lin Zhang、Zhong-Hua Gao、Song Ye
DOI:10.1021/acs.orglett.3c00006
日期:2023.2.10
alkene-tethered α-imino-oxy acids and acylimidazoles. The corresponding substituted 3,4-dihydro-2H-pyrroles were afforded in moderate to good yields with good to high diastereoselectivities in most cases. The reaction involves the 5-exo-trig radical cyclization of an alkene-tethered iminyl radical and the following coupling with a ketyl radical from acylimidazole under NHC catalysis.