Regio- and Stereoselective One-Pot Synthesis of Unknown Oxazoline-Fused Pyridazines by ‘Michael Addition-Pyridazine Cyclization-Oxazoline Cyclization’ Cascade Reactions of 4-Chloro-1,2-diaza-1,3-butadienes with 3-Dimethylaminopropenoates - Attanasi, Orazio A; Favi, Gianfranco; Filippone, Paolino; Golobič, Amalija; Perrulli, Francesca R; Stanovnik, Branko; Svete, Jurij (Synlett, 2007)