A PHP Error was encountered

Severity: Warning

Message: file_get_contents(https://...@pubfacts.com&api_key=b8daa3ad693db53b1410957c26c9a51b4908&a=1): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests

Filename: helpers/my_audit_helper.php

Line Number: 176

Backtrace:

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 176
Function: file_get_contents

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 250
Function: simplexml_load_file_from_url

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 1034
Function: getPubMedXML

File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3152
Function: GetPubMedArticleOutput_2016

File: /var/www/html/application/controllers/Detail.php
Line: 575
Function: pubMedSearch_Global

File: /var/www/html/application/controllers/Detail.php
Line: 489
Function: pubMedGetRelatedKeyword

File: /var/www/html/index.php
Line: 316
Function: require_once

Molecular design of chiral quaternary ammonium polymers for asymmetric catalysis applications. | LitMetric

Molecular design of chiral quaternary ammonium polymers for asymmetric catalysis applications.

Org Biomol Chem

Department of Environmental and Life Sciences, Molecular Chemistry Division, Toyohashi University of Technology, Toyohashi, 441-8580, Japan.

Published: April 2012

Repeated reaction between a chiral quaternary ammonium dimer and disodium disulfonate gave a chiral ionic polymer, which showed excellent catalytic activity in the asymmetric benzylation of N-diphenylmethylene glycine tert-butyl ester.

Download full-text PDF

Source
http://dx.doi.org/10.1039/c2ob06909aDOI Listing

Publication Analysis

Top Keywords

chiral quaternary
8
quaternary ammonium
8
molecular design
4
design chiral
4
ammonium polymers
4
polymers asymmetric
4
asymmetric catalysis
4
catalysis applications
4
applications repeated
4
repeated reaction
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!