Synthesis and Antibacterial Evaluation of Bis‐thiazolium, Bis‐imidazolium, and Bis‐triazolium Derivatives
作者:Benoît Thomas、Raphaël E. Duval、Stéphane Fontanay、Mihayl Varbanov、Michel Boisbrun
DOI:10.1002/cmdc.201900151
日期:2019.7.3
compounds: bis‐thiazoliums, bis‐imidazoliums, and bis‐1,2,4‐triazoliums. If some compounds of the first series showed fair antibacterialactivity, most of those belonging to the two other series were highly potent, with minimum inhibitory concentrations close to 1 μg mL−1. Some of them also exhibited low toxicity toward eukaryotic MRC‐5 lung fibroblasts, and we showed that this toxicity is clearly correlated
The present disclosure relates to certain new and known triazolium and/or imidazolium salts and to their therapeutic use, for example in methods of treating or preventing an infection by a
Plasmodium
or
Babesia
parasite in a subject in need thereof. The triazolium and imidazolium salts are compounds of the Formula (I) or (II): wherein R
1
-R
4
, R
1′
-R
3′
, R
8
-R
11
, X, X′, X″, Y, Y′ and Y″ are as defined in the disclosure.
Origin of the Red Shifts in the Optical Absorption Bands of Nonplanar Tetraalkylporphyrins
作者:Raid E. Haddad、Stéphanie Gazeau、Jacques Pécaut、Jean-Claude Marchon、Craig J. Medforth、John A. Shelnutt
DOI:10.1021/ja0280933
日期:2003.2.1
meso-cyclopropyl substituents decreases (the opposite of the effect observed for conventional strapped porphyrins). Several spectroscopic markers for nonplanarity (UV-visible bands, resonanceRaman lines, and (1)H NMR resonances) are found to correlate with time-averaged deformations obtained from an NSD analysis of molecular dynamics snapshot structures. These results suggest that UV-visible band shifts of
Regioselective C–H oxidation of aliphatic molecules with synthetic catalysts is challenging. We incorporated substrate-recognition sites into a ruthenium porphyrin–heteroaromatic N-oxide catalytic system in order to characterise its regioselectivity for the oxidation of alkanes. This substrate-recognition catalytic reaction exhibits high regioselectivity and high reaction efficiency.
Synthesis of dimeric steroids as components of lipid membranes
作者:Jacek W. Morzycki、Sławomir Kalinowski、Zenon Łotowski、Joanna Rabiczko
DOI:10.1016/s0040-4020(97)00669-8
日期:1997.7
The synthesis of three dimeric steroids 1,2, and 3, as components of artificial lipid bilayer membranes, is described. Di(3β-hydroxyfurost-5-en-26-yl) (1) was obtained from diosgenin by reductive fission of a ring F, substitution of -OH by -l, and the Wurtz reaction. Two other dimers 2 and 3 were synthesised from the pregnanoic ester 10 by an “alkylation-reduction” procedure.