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

A new class of C3-symmetrical hemicryptophane hosts: triamide- and tren-hemicryptophanes. | LitMetric

A new class of C3-symmetrical hemicryptophane hosts: triamide- and tren-hemicryptophanes.

J Org Chem

Laboratoire de Chimie, CNRS, Ecole Normale Supeéieure de Lyon, F-69364 Lyon 07, France.

Published: March 2010

The first hemicryptophanes derived from tris(N-alkyl-carbamoylmethyl)amine and tris(2-aminoethyl)amine (tren) have been synthesized following a single synthetic pathway that allows the subsequent formation of the two heteroditopic hosts 3 and 4. X-ray crystal structures show a well-defined cavity encapsulating a solvent guest for both compounds emphasizing their complexation properties.

Download full-text PDF

Source
http://dx.doi.org/10.1021/jo100052rDOI Listing

Publication Analysis

Top Keywords

class c3-symmetrical
4
c3-symmetrical hemicryptophane
4
hemicryptophane hosts
4
hosts triamide-
4
triamide- tren-hemicryptophanes
4
tren-hemicryptophanes hemicryptophanes
4
hemicryptophanes derived
4
derived trisn-alkyl-carbamoylmethylamine
4
trisn-alkyl-carbamoylmethylamine tris2-aminoethylamine
4
tris2-aminoethylamine tren
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!