By combining a three-component reaction of 2, 3-diaminomaleonitrile, ketones and isocyanides with a subsequent reaction of 1,6-dihydropyrazine-2,3-dicarbonitrile derivatives obtained from isocyanide-based three-component reaction with various alkyl and aryl isocyanates or isothiocyanates can be assembled a new class of highly substituted imidazo[1,5-a]pyrazine derivatives.
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http://dx.doi.org/10.1007/s11030-008-9099-3 | DOI Listing |
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