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Molecules 2000, 5(3), 629-636; doi:10.3390/50300629

New Conjugated Systems Derived from Piperazine-2,5-dione

Chemistry Department, Faculty of Science, King Abdul-Aziz University, Jeddah 21413, P.O. Box 9028, Saudi Arabia
Received: 8 March 1999 / Revised: 25 November 1999 / Accepted: 30 December 1999 / Published: 10 March 2000
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The preparation of monoarylidene and both symmetrical and unsymmetrical bisarylidene derivatives of piperazine-2,5-dione is described. The use of 1,4-diacetylpiperazine-2,5-dione make it possible to prepare unsymmetrical bisarylidenes. The introduction of a dicyanomethylene moiety into the para position of one of the arylidene groups gave a remarkable deepening in the colour of the resulting compounds 11 and 16.
Keywords: Piperazine-2; 5-dione; arylidene; bisarylidene; dicyanomethylene Piperazine-2; 5-dione; arylidene; bisarylidene; dicyanomethylene
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Asiri, A.M. New Conjugated Systems Derived from Piperazine-2,5-dione. Molecules 2000, 5, 629-636.

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