Here, we report a metal‐free synthesis of anthranils from ortho‐carbonyl anilines using PhIO as a sole additive under ambient conditions. This methodology did not require any external additives and delivered anthranils in excellent yields with broad substrate scope. The mechanistic studies suggest that the reaction proceeds via in‐situ generation of iminoiodane leading to nitrene and a subsequent nucleophilic attack from oxygen of ortho‐carbonyl aniline on nitrene results in heterocyclization.

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A series of tellurite‐based glasses are prepared by using a melt‐quenching method. The effect of cerium on the physical, thermal, structural, optical, spectroscopic, and shielding properties of barium tellurite glass samples is studied. It has been observed that the thermal stability factor increases with increasing cerium ion (Ce3+) concentration. The density and other physical parameters such as ion concentration and molar volume are calculated using the Archimedes principle. An increase in optical band gap and density suggests a decrement in non‐bridging oxygens. These results are in accordance with Raman results. The blue emission in prepared glasses is studied in terms of International Commission on Illumination chromaticity coordinates. Moreover, various shielding properties such as mass attenuation coefficient, linear attenuation coefficient, effective atomic number, half‐value layer, and tenth‐value layer have also been determined to understand the photon shielding characteristics of as‐prepared glass samples.

Aus den Ketonen (II) erhält man nach Wittig die Olefine (I); die Ketone (II) entstehen bei der Diels‐Alder‐Reaktion von Dienen (III) mit Vinylketonen (IV).