Chromium, tungsten, iron, and ruthenium complexes of the 4-membered ring diazene 3,4-diazatricyclo[4.2.1.02,5]non-3-ene

Synthesis of Alkali Metal Carboxylates and Carboxylic Acids Using “Wet” and “Anhydrous” Alkali Metal Hydroxides

“…Hydrolysis of the carbamate 270 (Scheme , entry a) to the corresponding alcohol 271 , precursor of the mevalonolactone, has been achieved using “APH” in ether in less than 1 h at room temperature . Similarly hydrolysis of the bis-carbamate 272 has been performed by “APH” in a little more time (3 h, Scheme , entry b) and provides the strained hydrazine 273 precursor of the corresponding diazene . Attempts to perform hydrolysis using potassium hydroxide in ethylene glycol at high temperature were unsuccessful, resulting in complete destruction of the compound, and acid-catalyzed hydrolysis is similarly unproductive …”