Stereoselective Synthesis of Vinyl Bis-Chalcogenide Using PEG-400

Submitted by Mírian Farias Ribeiro (mirianfribeiro@yahoo.com.br) on 2022-05-11T13:25:09Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Borges.pdf: 2369615 bytes, checksum: 1d5d0aa1bb5256eccc3d937db04d350d (MD5) Approved for entry into archive by Aline Batista (alinehb.ufpel@gmail.com) on 2022-05-16T11:20:29Z (GMT) No. of bitstreams: 2 Borges.pdf: 2369615 bytes, checksum: 1d5d0aa1bb5256eccc3d937db04d350d (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Made available in DSpace on 2022-05-16T11:20:29Z (GMT). No. of bitstreams: 2 Borges.pdf: 2369615 bytes, checksum: 1d5d0aa1bb5256eccc3d937db04d350d (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2013-02-15 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES No presente trabalho, PEG-400 foi utilizado como solvente verde para a síntese de vários bis-calcogenetos vinílicos em rendimentos que variaram de moderados a bons (30 a 83%) e alta seletividade. Este método simples e geral, envolve a reação de dicalcogenetos de diorganoila com calcogenoalquinos, utilizando como agente redutor o NaBH4 e fornecendo os bis-calcogenetos vinílicos preferencialmente com configuração Z (Esquema 1). In this work, PEG-400 was successfully used as a green solvent to synthesize several vinyl bis-chalcogenide in moderate to good (30 to 83%) and has in high selectivity. This general, simple and quite method involves a reaction of diorganoyl dichalcogenides with chalcogenealkynes, using NaBH4 resulting in the corresponding vinyl bis-chalcogenide preferentially with a Z configuration (Scheme 1).