Synthesis Of New Asymmetrical Pyromellitdiimides Derived From Pyromellitic Dianhydride

E. T. Ali

Article Details

Synthesis Of New Asymmetrical Pyromellitdiimides Derived From Pyromellitic Dianhydride

Authors:

E. T. Ali

Publisher:

University of Baghdad

Journal:

Ibn AL-Haitham Journal For Pure and Applied Sciences Vol.25 Issue 3, pp.284-293

Document Type:

Article

Publication Date:

1/2012

Document Language:

English

Document ID (Org No.):

2001377034

pISSN:

2521-3407

Keywords:

Abstract:

 This work involves the synthesis and characterization of asymmetrical pyromellitdiimide derivatives [IV]a-fby four sequence steps selective reaction . One mole of pyromellitic dianhydride was reacted with one mole of various primary aromatic amines [ 4-nitro aniline , 4-chloro aniline , 4-toludine and 4-anisidine] in excess of dry acetone to produce six compounds (N-substituted-pyromellitamic monoacid) [I]a-f . These new compounds [I]a-d were converted to the corresponding N- substituted- pyromellitmonoimide [II]a-d via their heating at (80-90) 0C in sodium acetate-acetic anhydride mixture .The compounds [II]a-fwere allowed to react with one mole of another primary amines in excess of dry acetone to give new derivatives of amic acid [II]a-d followed by intramolecular cyclization reaction of these compounds [IV]a-f in sodium acetate-acetic anhydride system to yield the desired asymmetrical pyromellitdiimide derivatives [IV]a-f, the above reactions can be summarized in Scheme 1.All the synthesized compounds have been studied and charachterized by their melting points , FTIR , and 1HNMR spectroscopy (for some of them).

Article Details

Synthesis Of New Asymmetrical Pyromellitdiimides Derived From Pyromellitic Dianhydride

Authors:

E. T. Ali

Publisher:

University of Baghdad

Journal:

Ibn AL-Haitham Journal For Pure and Applied Sciences Vol.25 Issue 3, pp.284-293

Document Type:

Article

Publication Date:

1/2012

Document Language:

English

Document ID (Org No.):

2001377034

pISSN:

2521-3407

pyromellitic dianhydride

pyromellitidiimides

pyromellitidiisoimides

Issues

Article Details

Synthesis Of New Asymmetrical Pyromellitdiimides Derived From Pyromellitic Dianhydride

Authors: E. T. Ali

Publisher: University of Baghdad

Journal: Ibn AL-Haitham Journal For Pure and Applied Sciences Vol.25 Issue 3, pp.284-293

Document Type: Article

Publication Date: 1/2012

Document Language: English

Document ID (Org No.): 2001377034

pISSN: 2521-3407

pyromellitic dianhydride

pyromellitidiimides

pyromellitidiisoimides

Issues

Authors:

E. T. Ali

Publisher:

University of Baghdad

Journal:

Ibn AL-Haitham Journal For Pure and Applied Sciences Vol.25 Issue 3, pp.284-293

Document Type:

Article

Publication Date:

1/2012

Document Language:

English

Document ID (Org No.):

2001377034

pISSN:

2521-3407