A PHP Error was encountered

Severity: Warning

Message: file_get_contents(https://...@gmail.com&api_key=61f08fa0b96a73de8c900d749fcb997acc09&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: 3122
Function: getPubMedXML

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

Studies toward frondosin A and its analogues. Formal total synthesis of (+/-)-frondosin A. | LitMetric

Studies toward frondosin A and its analogues. Formal total synthesis of (+/-)-frondosin A.

Org Lett

Department of Chemistry, Connecticut College, 270 Mohegan Avenue, New London, Connecticut 06320, USA.

Published: August 2008

Two reaction sequences commencing with different starting materials were successfully employed for the synthesis of frondosin A analogues, including (+/-)-frondosin A dimethyl ether. Construction of the bicyclo[5.4.0]undecane core in each case was achieved through an expedient microwave-assisted tandem 5-exo cyclization--Claisen rearrangement process.

Download full-text PDF

Source
http://dx.doi.org/10.1021/ol8011343DOI Listing

Publication Analysis

Top Keywords

frondosin analogues
8
studies frondosin
4
analogues formal
4
formal total
4
total synthesis
4
synthesis +/--frondosin
4
+/--frondosin reaction
4
reaction sequences
4
sequences commencing
4
commencing starting
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!