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: 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

Synthesis of dibarrelane, a dibicyclo[2.2.2]octane hydrocarbon. | LitMetric

Synthesis of dibarrelane, a dibicyclo[2.2.2]octane hydrocarbon.

J Org Chem

Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda-shi, Chiba 278-8510, Japan.

Published: March 2014

The synthesis of a novel hydrocarbon, dibarrelane, has been accomplished in 11 steps via an intramolecular REDDA reaction of a masked o-benzoquinone, followed by Clemmensen reduction and Barton decarboxylation. The twisted structure of the tetracyclic dibarrelane skeleton was also clarified via X-ray crystallography. Finally, it was proposed that dibarrelane has C2 symmetry rather than C(2v) symmetry.

Download full-text PDF

Source
http://dx.doi.org/10.1021/jo5003455DOI Listing

Publication Analysis

Top Keywords

synthesis dibarrelane
4
dibarrelane dibicyclo[222]octane
4
dibicyclo[222]octane hydrocarbon
4
hydrocarbon synthesis
4
synthesis novel
4
novel hydrocarbon
4
hydrocarbon dibarrelane
4
dibarrelane accomplished
4
accomplished steps
4
steps intramolecular
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!