RESUMO
Meso-nitrile oxide group in 1,7-Diphenyl-containing BODIPYs can be involved in highly unusual [3+2] intramolecular cycloaddition reaction with the formation of the dihydrobenzo[d]isoxazole-containing BODIPYs. Oxidation of these compounds results in the formation of unprecedented either benzisoxazole- or benzo[b]azepine-fused fully conjugated NIR absorbing BODIPYs. The photophysical properties and electronic structures of the target compounds were studied by an array of experimental and theoretical methods.
RESUMO
Calcium cyanamide is an important fertilizer and a chemical precursor. However, its large scale synthesis is extremely energy intensive via the historical Frank-Caro synthesis of fixing atmospheric nitrogen with calcium carbide at an elevated temperature, and the product material contains a large number of impurities. In this work, we prepare calcium cyanamide in a purity higher than that achievable by the Frank-Caro route in a convenient laboratory method.