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

Convenient synthesis of functionalized bis-ureidopyrimidinones based on thiol-yne reaction. | LitMetric

Convenient synthesis of functionalized bis-ureidopyrimidinones based on thiol-yne reaction.

Chemistry

Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190 (P.R. China); University of the Chinese Academy of Sciences Beijing 100049 (P.R. China).

Published: September 2014

The preparation of functionalized bis-ureidopyrimidinones (Bis-UPy) through the thiol-yne reaction is described. Various Bis-UPys with different functional groups were synthesized by using the readily available functionalized alkynes and UPy-thiol to affirm the simplicity and versatility of the methodology.

Download full-text PDF

Source
http://dx.doi.org/10.1002/chem.201402955DOI Listing

Publication Analysis

Top Keywords

functionalized bis-ureidopyrimidinones
8
thiol-yne reaction
8
convenient synthesis
4
synthesis functionalized
4
bis-ureidopyrimidinones based
4
based thiol-yne
4
reaction preparation
4
preparation functionalized
4
bis-ureidopyrimidinones bis-upy
4
bis-upy thiol-yne
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!