eprintid: 447
rev_number: 12
eprint_status: archive
userid: 65
dir: disk0/00/00/04/47
datestamp: 2007-03-27 11:12:17
lastmod: 2007-03-27 11:12:17
status_changed: 2007-03-27 11:12:17
type: article
metadata_visibility: show
creators_name: D, Venugopal
creators_name: M. , Subrahmanyam 
corp_creators: Catalysis Division, Indian Institute of Chemical Technology, Hyderabad 500 007, India 
title: Single-step synthesis of 2-methylquinoxaline from 1,2-phenylenediamine and 1,2-propanediol over modified HY zeolites
ispublished: pub
subjects: QD
divisions: sch_che
full_text_status: public
abstract: The cyclization reaction of 1,2-phenylenediamine and 1,2-propanediol for the synthesis of 2-methylquinoxaline (2-MQ) was carried out over the HY, LaHY, PbHY, CuHY and CrHY zeolites at 350 °C. The catalytic activity towards the yield of 2-MQ followed the order: PbHY > MnHY > CrHY > LaHY > HY > CuHY. The medium acidic catalysts like Pb- and Cr-modified HY zeolites gave high activity. The high acidity of the catalyst and high reaction temperatures decrease the yield and selectivity of the product. The maximum yield of 82.1% of 2-MQ with 99.2% conversion of 1,2-phenylenediamine was obtained over a PbHY catalyst at 350 °C. 


date: 2001
publication: Catalysis Communications 
volume: 2
publisher: Elsevier
pagerange: 219-223
refereed: TRUE
citation:   D, Venugopal and M. , Subrahmanyam   (2001) Single-step synthesis of 2-methylquinoxaline from 1,2-phenylenediamine and 1,2-propanediol over modified HY zeolites.  Catalysis Communications , 2 .   pp. 219-223.      
document_url: http://catalysis.eprints.iitm.ac.in/447/1/sdarticle.pdf