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- Title
Synthesis of previously unknown 3,3′-linearly linked sulfur- and selenium-containing bispyrazoles by reactions of 3-alkenyl-5-chloropyrazoles with bischalcogenols.
- Authors
Rudyakova, E.; Samultsev, D.; Levanova, E.; Levkovskaya, G.
- Abstract
By reactions of 3-alkenyl-5-chloropyrazoles with appropriate dichalcogenols the fi rst specimens were obtained of previously unknown 3,3'-linearly linked bispyrazoles containing in the alkyl chain of the linker two heteroatoms, sulfur or selenium. 3-Vinyl-5-chloropyrazoles react with 1,3-propanedithiol, 2-hydroxy-1,3-propanedithiol, and 2-hydroxy-1,3-propanediselenol under UV irradiation and heating at 60°C over 8 h affording products of the addition against Markovnikoff rule. The radical addition of 1,3-propanedithiol to 3-isopropenyl-5-chloropyrazole required a longer time, 15 h.
- Subjects
CHEMICAL reactions; CHALCOGENS; PYRAZOLES; ATOMIC structure; CHLOROPHENOLS
- Publication
Russian Journal of Organic Chemistry, 2013, Vol 49, Issue 5, p734
- ISSN
1070-4280
- Publication type
Article
- DOI
10.1134/S1070428013050175