A. Hassan, N. Mohamed, Yusria R. Ibrahim
Jun 14, 1993
Citations
0
Influential Citations
13
Citations
Journal
European Journal of Organic Chemistry
Abstract
2,3-Dicyano-1,4-naphthoquinone (DCNQ), the easily obtainable isomer of 2-(dicyanomethylene)indane-1,3-dione (CNIND), reacts with arylazo-, pyridylazo- and arylaminopyrazoles 1–3 via charge-transfer (CT) complexation to yield pyrazolo[2,3-α]quinazolinediones 10a–f and pyrazolo[2,3-α]-quinazolinyl acetates 11a–e. Furthermore, aminopyrazole 3 reacts with 2,3-dichloronaphthoquinone (DCHNQ) to afford the naphthoquinoimidazopyrazole 13. The mechanism of the formation of products 10 and 11 is discussed.