Nucleophilic Substitution Reactions of (Alkoxymethylene)dimethylammonium Chloride
作者:Anthony G. M. Barrett、D. Christopher Braddock、Rachel A. James、Nobuyuki Koike、Panayiotis A. Procopiou
DOI:10.1021/jo980583j
日期:1998.9.1
The use of imidate esters as potential replacements for diethyl azodicarboxylate and triphenylphosphine in the Mitsunobu reaction is described. A series of secondary alcohols were allowed to react with (chloromethylene)dimethylammonium chloride, generated from dimethylformamide (DMF) and oxalyl chloride, to give imidate esters. Reaction of these salts with potassium benzoate or potassium phthalimide
Amplification of the chiroptical response of UV-transparent amines and alcohols by <i>N</i>-phthalimide derivatization enabling absolute configuration determination through ECD computational analysis
substrates allowing their reliable absoluteconfiguration determination by computational analysis of ECD spectra. Such a transformation also leads to a significant reduction in the molecular conformational flexibility thus simplifying the conformational analysis required by the computational treatment. The method described herein thus allows the absoluteconfigurationassignment to these challenging substrates
Nucleophilic substitution of (alkoxymethylene)dimethylammonium chloride with potassium phthalimide; a convenient procedure for the synthesis of imides with inversion of configuration
作者:Anthony G. M. Barrett、D. Christopher Braddock、Rachel A. James、Panayiotis A. Procopiou
DOI:10.1039/a607482k
日期:——
Secondary alcohols are converted into their phthalimido derivatives
with inversion of configuration via sequential reaction with
(chloromethylene)dimethylammonium chloride and potassium phthalimide.