Catalyse et inhibition de deux reactions concurrentes en milieu micellaire cationique
作者:R. Soto、G. Meyer、P. Viout
DOI:10.1016/s0040-4020(01)98910-0
日期:1981.1
The general acid catalysed hydrolysis and the intramolecularnucleophilicanionic cyclization of acyloximes operate concurrently in water at pH 7–9. Hydrolysis is inhibited by cationic micelles; changing the length of the acyl chain does not affect the micellareffect, possibly because the environment of the reacting species is not influenced by this variation in the structure of the micelle.
Abstract2‐(1‐Methyliminoethyl)phenol (1 a) reacts with diethyl zinc to give bis[2‐(1‐methyliminoethyl)phenolato]zinc (3) via [2‐(1‐methyliminoethyl)phenolato]ethylzinc (2) as an intermediate. The complex 3 is also formed in the reaction of bis(trimethylsilyl)amide zinc with 1 a. The compounds were characterized by microanalysis, NMR (1H, 13C) and IR spectroscopy. X‐ray structure analysis of the compounds 2 and 3 revealed that both compounds form in the solid state dimeric species where the monomeric units are bridged via two oxygen atoms forming a planar Zn2O2 ring with tetrahedral [ZnO2NC] and trigonal‐bipyramidal [ZnO3N2] coordination of the zinc atom, respectively.