Dicarbonyl compounds such as (I) and (VII) react with N‐acylglycines such as (III) and (VI) and one‐carbon synthons such as (II) and (VIII) to yield pyranones (IV) and (V).
Synthesis of Highly Functionalized Imidazo[1,5-a]pyrazines. -Starting from diaminomaleonitrile derivatives (I) and (X) or imidazole derivatives (IV) and (V), different methods for the synthesis of highly substituted imidazo[1,5-a]pyrazines are developed. -(TRCEK, T.; VERCEK*, B.; Synthesis 2006, 20, 3437-3442; Fac. Chem.
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