Indian Science Technology and Engineering facilities Map
Supplier Map
Service Map

Patents

Patent Details

Applicant:
Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) Bengaluru 
Title:
A Process for Bromination of Arylene Dianhydrides and a Method of Synthesis of Diimides Thereof 
Inventor(s):
Govindaraju Thimmaiah, Venkata Suseela Yelisetty 
Applicant:
Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) Bengaluru 
Application type:
Granted - 2019-12-02 
Application Number:
326517 
Applied at:
India 
Entered by:
Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) Bengaluru 
Abstract:
The present disclosure relates to a process for bromination of arylene dianhydrides, particularly1,4,5,8-naphthalenetetracarboxylic dianhydride (NDA) using 5,5-dimethyl-1,3- dibromohydantoin (DBH) and tribromoisocyanuric acid (TBCA) as brominating agents. The disclosure further relates to condensation of the brominated dianhydrides with amines to yield corresponding imides, particularly naphthalene diimides (NDI) which are versatile precursors for the synthesis of core functionalized naphthalene diimides. The use of DBH or TBCA asbrominating agents are not only restricted to arylene dianhydrides in the present disclosure as they can also be used for brominating any aromatic or unsaturated compounds.  

 
I-Mitra(आई-मित्र) Welcomes You..
THE VISION
THE MISSION
ABOUT I-STEM
It has always been the basic tenet of the Government of India, in generously funding R&D efforts at academic institutions over the years, that facilities established through such support be made available to those needing them and qualified to make use of them for their own research work
read more >>

However, this was never easy or straightforward for, among other reasons, there was no ready source of information of what facility was available and where. Thanks to the Web, it is much easier today to have a national and regional “inventory of resources”, so as to match users with the resources they need, and to do all this in an efficient and transparent manner.

This can lead to a leap in R&D productivity and greatly enhance the effectiveness of public investment. This is the motivation behind I-STEM.
read less <<
Visitor Hit Counter
Hosted at Indian Institute of Science
Copyright © 2020 I-STEM. All rights reserved.
Audited by: STQC Bengaluru.