ChemInform Abstract: Synthesis of 3-Oxo-1,4-diazepine-5-carboxamides and 6-(4-Oxo-chromen-3-yl)-pyrazinones via Sequential Ugi 4CC/Staudinger/Intramolecular Nucleophilic Cyclization and Ugi 4CC/Staudinger/Aza-Wittig Reactions.

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