Cyclohexanone selenosemicarbazone: A convenient starting material for the preparation of functionalised selenosemicarbazones and their Pt and Pd complexes

Old Selenium Heterocycles Revisited: Synthesis, Spectroscopic, and Structural Characterization ofN‐Acyl‐1,3‐selenazol‐2(3H)‐imines and 5‐Acyl‐1,3‐selenazol‐2‐amines from Acylselenourea Derivatives

“…Given that there are published reports of incorrectly assigned structures of chalcogen‐containing heterocycles formed by reactions of chalcogenoureas with phenacyl bromides, we wished to reexamine the reactions reported by Liebscher and Hartmann and to spectroscopically and structurally characterize the products to allow unambiguous assignment of the structures. This study also represents a continuation of our work on the coordination chemistry of selenoureas and other organoselenium compounds …”

Acylselenoureas, selenosemicarbazones and selenocarbamate esters: Versatile ligands in coordination chemistry

“…We have published an improved, reproducible preparation for this synthon together with its X-ray crystal structure. 86 If the substituent on the imine carbon carries a potential donor atom, a functionalised selenosemicarbazone is obtained. For the purpose of this article, a compound of the type D-CR=NNHC(Se)NH 2 , where D represents a donor atom (N, O or P) shall be defined as a functionalised selenosemicarbazone.…”

New approach towards the synthesis of selenosemicarbazones, useful compounds for Chagas' disease

“…The described methodologies for the preparation of these compounds are: reaction of acyl isoselenocyanates with phenylhydrazine [14], or cyclohexanone with hydrazine and potassium selenocyanate followed by exchange with different aldehydes [15].…”