A Note on sym-Dibenzoyl Acetone. Polyoxo Compounds. Vll

In the 3rd communication .of this series Balenovic and Munk described a compound obtained by alkaline hydrolysis of 2,6-diphenyl pyrone, which, after a molecule of water was split off, yielded the original pyrone. They came to the conclusion that this compound is identical with the hitherto undescribed sym-dibenzoyl acetone. The ketonic form of this compound should contain very reactive methylene groups in 1,3-positions, and should, therefore, readily read with sodium nitromalondialdehyde

Inhibition of Urease by Some Triazole, Urea, and Guanidine Derivatives

Series of aminotriazole, guanidine and urea derivatives were prepared and tested as urease inhibitors. A greater part of the tested compounds, all containing the sequence ressembling the substrate, have shown an inhibitory effect on urease

Synthesis of Di(s-triazinyl) Sulphides and Disulphides. The-Promoting Effect of Oxidants on the Cleavage of the Thioether Bond

Synthesis of a number of di(s-triazinyl) sulphides and disu1phides is described. The behaviour of these compounds on oxidative attack has been examined. It has been found that instead of the expected sulphoxide and/or sulphone formation upon oxidation, a simple scission of the thioether linkage takes place, yielding a hydroxytriazine and the corresponding disulphide