61671-44-1Relevant articles and documents
Synthesis of polydentate chalcogen-containing ligands using the system hydrazine hydrate–base
Levanova,Vilms,Bezborodov,Babenko,Sosnovskaya,Istomina,Albanov,Russavskaya,Rozentsveig
, p. 396 - 401 (2017/05/01)
The reaction of dichlorodiethyl ether or dichlorodiethylamine hydrochloride with potassium or ethanolammonium dichalcogenides prepared in situ from elemental sulfur or selenium in the system hydrazine hydrate–alkali results in oligomeric dichalcogenides,
Chalcogenation of 1,4-dichlorobut-2-yne with organic dichalcogenides in the system hydrazine hydrate–KOH
Levanova,Vakhrina,Grabel’nykh,Rozentsveig,Russavskaya,Albanov,Klyba,Korchevin
, p. 2083 - 2089 (2016/10/03)
A reaction of organic dichalcogenides R2Y2 (R = Ph, Bn, Pr; Y = S, Se) with 1,4-dichlorobut-2-yne in the system hydrazine hydrate–KOH leads to four principal products: 1,4-bis(organylchalcogenyl)but-2-ynes, 1-organylchalcogenylbut-1-en-3-ynes, 4-organylchalcogenylbut-1-en-3-ynes, and 3(5)-methylpyrazole. The selectivity of the formation of individual products is determined by the ratio of the substrates used and the reaction temperature. A plausible mechanism of chalcogenation considered in the work agrees with the effect of the nature of chalcogene atoms and organic substituents R on stability of intermediates and products. The stabilization of carbanions by α chalcogene-containing groups corresponds to the following order: PhS > PhSe > BnS > BnSe > PrS.
