Cationic metallovesicles: catalysis of the cleavage of p-nitrophenyl picolinate and control of copper(II) permeation
作者:Paolo Scrimin、Paolo Tecilla、Umberto Tonellato
DOI:10.1021/ja00039a020
日期:1992.6
made of surfactants 1 and 2 constitute one of the first examples of hydrolytic metallovesicles. The kinetic investigation was focused on the hydrolysis of the p-nitrophenylester of the p-nitrophenylester of picolinic acid (PNPP) : in line with previous results, the kinetic effects were attributed to the pseudo-intramolecular transacylation of a metal-ion-coordinated hydroxy group of the ligand subunit
Surface Properties, Thermodynamic Aspects and Antimicrobial Activity of Some Novel Iminium Surfactants
作者:Ismail Aiad、Mohamed M. El‐Sukkary、Ali El‐Deeb、Moshira Y. El‐Awady、Samy M. Shaban
DOI:10.1007/s11743-011-1317-9
日期:2012.5
Novel iminium compounds namely p‐benzylidene benzyldodecyl iminium chloride (I), p‐benzylidene benzylhexadecyl iminium chloride (II), p‐benzylidene benzyloctadecyl iminium chloride (III) were prepared and characterized using FTIR, 1H‐NMR and mass spectroscopy. The surface properties such as surface and interfacial tension, and biologicalactivity of these surfactants were investigated. The surface parameters
effort to exploit the bioactive natural scaffold 3,4-dihydroisoquinolin-1(2H)-one for plant disease management, 59 derivatives of this scaffold were synthesized using the Castagnoli–Cushman reaction. The results of bioassay indicated that their antioomycete activity against Pythium recalcitrans was superior to the antifungal activity against the other 6 phytopathogens. Compound I23 showed the highest in
es 4a-h and 5e. The influence of the pentacoordinated phosphorus atom on the stereoselectivity of the Pudovik reaction might be attributed to the involvement of the rigid spirophosphoranide (PV) intermediate in the addition reaction. Selective and one-pot hydrolysis of these P-C bond spirophosphoranes readily proceeds either at room temperature in the presence of moist solvents to give the corresponding
Chiral PâH spirophosphoranes reacted with long-chain prochiral aldimines and, after selective hydrolysis, afforded (α-amino)phosphonic acid amphiphiles in both enantiopure forms.