A novel method for metal‐free oxothiolation of ynamides to construct oxazolidine‐2,4‐diones bearing sulfur‐substituted quaternary carbonatoms has been developed. It represents a rare C−O bond cleavage of ynamides, as well as a facile and tandem approach for the formation of C−O, C−S, and C−Cl bonds. This redox‐neutral protocol can be applied to the synthesis of multisubstituted oxazolidine‐2,4‐diones
Azetidinimines as a novel series of non-covalent broad-spectrum inhibitors of β-lactamases with submicromolar activities against carbapenemases KPC-2 (class A), NDM-1 (class B) and OXA-48 (class D)
作者:Eugénie Romero、Saoussen Oueslati、Mohamed Benchekroun、Agathe C.A. D’Hollander、Sandrine Ventre、Kamsana Vijayakumar、Corinne Minard、Cynthia Exilie、Linda Tlili、Pascal Retailleau、Agustin Zavala、Eddy Elisée、Edithe Selwa、Laetitia A. Nguyen、Alain Pruvost、Thierry Naas、Bogdan I. Iorga、Robert H. Dodd、Kevin Cariou
DOI:10.1016/j.ejmech.2021.113418
日期:2021.7
inhibit not only the three main clinically-relevant carbapenemases of Ambler classes A (KPC-2), B (NDM-1) and D (OXA-48) with Ki’s below 0.3 μM, but also the cephalosporinase CMY-2 (class C, 86% inhibition at 10 μM). Our results pave the way for the development of a new structurally original family of non-covalent broad-spectrum inhibitors of β-lactamases.
with a catalytic amount of TpRuCl(PPh3)2 resulted in the construction of indole scaffolds known as privileged structure motifs. This reaction involved a cascade of 1,2‐rearrangement and cyclization carrying out C−C bond formationvia a rutheniumvinylidene intermediate, as revealed by a deuterium‐labeling experiments. Furthermore, the transformation of multi‐functionalized ynamide, derived from a practical
Base-Mediated Generation of Ketenimines from Ynamides: Direct Access to Azetidinimines by an Imino-Staudinger Synthesis
作者:Eugénie Romero、Corinne Minard、Mohamed Benchekroun、Sandrine Ventre、Pascal Retailleau、Robert H. Dodd、Kevin Cariou
DOI:10.1002/chem.201702545
日期:2017.9.21
were used as precursors for the in situ generation of highly reactive ketenimines that could be trapped with imines in a [2+2] cycloaddition. This imino-Staudinger synthesis led to a variety of imino-analogs of β-lactams, namely azetidinimines (20 examples), that could be further functionalized through a broad range of transformations.
Base‐Mediated Generation of Ketenimines from Ynamides: [3+2] Annulation with Azaallyl Anions
作者:Agathe C. A. D'Hollander、Eugénie Romero、Kamsana Vijayakumar、Camille Le Houérou、Pascal Retailleau、Robert H. Dodd、Bogdan I. Iorga、Kevin Cariou
DOI:10.1002/adsc.202100047
日期:2021.6.8
report that they can undergo a [3+2] cycloaddition with 2-azaallyl anions, obtainedfrom benzylimines under the same reaction conditions. This reaction between two highly reactive intermediates, both generated in situ from bench stable starting materials, gives access to various nitrogen-rich heterocycles. The reaction usually proceeds with excellent diastereoselectivity, in favor of the cis adduct. Deuteration