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Articles you may be interested inEnhanced optical power and low forward voltage of GaN-based light-emitting diodes with Ga-doped ZnO transparent conducting layer Appl. Phys. Lett. 96, 051124 (2010); 10.1063/1.3298644 Mechanisms of lighting enhancement of Al nanoclusters-embedded Al-doped ZnO film in GaN-based lightemitting diodes

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Synthesis and Mechanistic Study of Fused 2-Pyrrolines via Thermolysis of 6-Substituted-3,5-hexadienyl Azidoformates.-Heating of dienyl azidoformates at 300 • C, 0.05 Torr provides a new regioselective approach to fused 2-pyrrolines. It proceeds via formation of acyl nitrenes and aziridines, C-C bond cleavage, and recyclization to fused 2-pyrrolines. The reaction outcome depends on the configuration of the C5-C6 double bond, whereas the configuration of the C3-C4 double bond has no effect on the outcome. -

Thermolysis of 3,5-hexadienyl azidoformates at 300 degrees C, 0.05 Torr, led to a fused 2-pyrroline regiospecifically, regardless of the configuration E or Z between the C-3 and C-4 double bond. Thermolysis of 6-substituted-3,5(E)-hexadienyl azidoformates yielded a kinetically controlled 2-pyrroline with cis configuration between H-1 and H-8a whereas 6-substituted-3,5(Z)-hexadienyl azidoformates produced a cis and trans mixture. The mechanism was proposed as the loss of nitrogen to form an acyl nitrene, then addition to a double bond to produce an aziridine. Finally the cleavage of the C-C bond generated a vinylazomethine ylide followed by recyclization to a fused 2-pyrroline.