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Synthesis and fluorescence properties of donor-acceptor-substituted novel dipyrazolo[3,4-b:3',4'-d]pyridines (DPP). 2010
Madhukar N Jachak, and
Sandeep M Bagul, and
Dilip R Birari, and
Maruti G Ghagare, and
Muddassar A Kazi, and
Raghunath B Toche, and
Vijayavitthal T Mathad
Organic Chemistry Research Center, Department of Chemistry, K.R.T. Arts, B.H. Commerce and A.M. Science College, Gangapur Road, Nashik 422002 MS, India. mn_jachak@hotmail.com
A rapid and efficient method for the synthesis of novel dipyrazolo[3,4-b:3',4'-d]pyridines (DPP) from pyrazolo[3,4-b]pyridine was successfully developed. The DPP derivative was further N-alkylated (6, 8) as well as N-linked with amino acids (13) and their photophysical properties were studied along with N-aryl DPP 4 and observed that the chromophores at C(4) position in the aryl ring changed the absorption and emission lambda(max).
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