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

Anilines as C-Nucleophiles in Ir-Catalyzed Intramolecular Asymmetric Allylic Substitution Reactions. | LitMetric

Anilines as C-Nucleophiles in Ir-Catalyzed Intramolecular Asymmetric Allylic Substitution Reactions.

Chem Asian J

State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, P.R. China.

Published: October 2017

Anilines generally act as N-nucleophiles in transition-metal-catalyzed allylic substitution reactions. In this paper, a highly enantioselective intramolecular Friedel-Crafts-type allylic alkylation of aniline derivatives was realized by using an iridium catalyst derived from [Ir(cod)Cl] and (R )-BHPphos. Various tetrahydroisoquinilin-5-amines were obtained in moderate to good yields, excellent enantioselectivity and regioselectivity under mild reaction conditions. BHPphos=N-benzhydryl-N-phenyldinaphthophosphoramidite.

Download full-text PDF

Source
http://dx.doi.org/10.1002/asia.201701192DOI Listing

Publication Analysis

Top Keywords

allylic substitution
8
substitution reactions
8
anilines c-nucleophiles
4
c-nucleophiles ir-catalyzed
4
ir-catalyzed intramolecular
4
intramolecular asymmetric
4
asymmetric allylic
4
reactions anilines
4
anilines generally
4
generally n-nucleophiles
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!