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.
Initiators for living carbocationic polymerization
申请人:Kennedy Joseph
公开号:US10472457B2
公开(公告)日:2019-11-12
In various embodiments, the present invention is directed to new low cost initiator compositions for use with the production of well-defined telechelic PIBs (by LC+P of isobutylene). In various other embodiments, the present invention is directed to methods for using these novel compositions as initiators for isobutylene (IB) and other cationically polymerizable monomers, such as styrene and its derivatives. In still other embodiments, the present invention is directed to structurally new, allyl (and chlorine) telechelic PIBs formed from these new initiator compositions and their derivatives (in particular, hydroxyl telechelic PIB and amine telechelic PIB). In yet other embodiments, the present invention is directed to structurally new polyurethanes, polyureas, and polyurethane ureas made using telechelic PIBs formed from these new initiator compositions.
NARGENICIN COMPOUNDS AND USES THEREOF AS ANTIBACTERIAL AGENTS
申请人:Merck Sharp & Dohme Corp.
公开号:US20170305924A1
公开(公告)日:2017-10-26
The present invention relates to novel nargenicin related compounds which can inhibit DnaE and have antibacterial, particularly antimycobacterial activity against Mycobacterium tuberculosis. The present invention also relates to method for inhibiting growth of mycobacterial cells as well as a method of treating mycobacterial infections by
Mycobacterium tuberculosis
by administering an antimycobacterially effective amount of nargenicin or a nargenicin-related compound and/or their pharmaceutically acceptable salts.