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A New Method of Preparing Copper Oxide from Dinitrourea Copper Salt

“…Materials : The dinitrourea copper salt was prepared according to the literature procedure 3. The following reagents were used: dimethyl sulfoxide (CP grade, assay 99.8 %, procured from ZAO VEKTON, Russia), dimethylformamide (CP grade, assay 99.97 %, procured from ZAO VEKTON, Russia), and tributyl phosphate (assay 99 %, code 169930025, CAS 126‐73‐8, Acros Organics).…”

“…Treating DNU salts with bivalent metal salts lead to a possible synthesis of salts containing both identical and various cations, depending on the reaction conditions. In case the copper cation is used, a complexation reaction proceeds, wherein the dinitrourea anion acts as a ligand, alongside with an exchange reaction 3…”

Acyclic and Cyclic Ureas (Update 2013)

“…[326] The chemistry of these mostly unstable compounds has been investigated. [327][328][329] Harsh nitration conditions can be unsuitable for the preparation of nitroureas from structurally more complex substrates. Such compounds are therefore accessed by using multistep reaction sequences.…”

A New Synthetic Route to Heteroanthracenes

“…[2] The targeted activation of the reactive sites of 1 strongly affects reaction outcomes. [7][8][9][10] For example, 4-nitrosemicarbazide (2) was first synthesized from 1 (Scheme 1). [3][4][5][6] In contrast, polar media greatly influence the chemical activity of 1 and favor various reactions through which a very wide range of useful and new products can be produced.…”