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

Davis-Beirut Reaction Inspired Nitroso Diels-Alder Reaction. | LitMetric

Davis-Beirut Reaction Inspired Nitroso Diels-Alder Reaction.

Tetrahedron Lett

Department of Chemistry, University of California, Davis, One Shields Ave., Davis, CA 95616.

Published: April 2021

A Davis-Beirut reaction inspired nitroso Diels-Alder protocol is reported. The starting material for the procedure is a nitrophenyl moiety with the position appropriately substituted with a 2°-amine (see ) or 2°-alcohol (see ). Deprotonation at the benzylic position followed by concomitant oxidation of the benzylic position and reduction of the nitro moiety delivers a nitrosophenyl intermediate, which subsequently undergoes a nitroso Diels-Alder reaction. This one-pot procedure delivers aryldihydro-1,2-oxazines in moderate yields.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8039969PMC
http://dx.doi.org/10.1016/j.tetlet.2021.152951DOI Listing

Publication Analysis

Top Keywords

nitroso diels-alder
12
davis-beirut reaction
8
reaction inspired
8
inspired nitroso
8
diels-alder reaction
8
benzylic position
8
reaction davis-beirut
4
diels-alder protocol
4
protocol reported
4
reported 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!