Tailored Aza‐Michael Addition as Key Step in the Synthesis of 1H‐imidazo[5,1‐c][1,4]oxazine Scaffolds. - Mari, Giacomo; De Crescentini, Lucia; Favi, Gianfranco; Mantellini, Fabio; Santeusanio, Stefania (European Journal of Organic Chemistry, 2022)