title: A novel 3,4-bis(sulfenyl)- or 4-selenenyl-3-sulfenylpenta-2,4-dienylation of aldehydes using 4-ethoxy-1,2-bis(sulfenyl)- or 1-Selenenyl-2-sulfenyl-buta-1,3-dienyl lithiums.
abstract: 3,4-Dichalcogenopenta-2,4-dienylation of aldehydes proceeded in good to high yields using 4-ethoxy-1-(benzenesulfenyl)-2-(methanesulfenyl)- (5), 4-ethoxy-1,2-bis(benzenesulfenyl)but-1,3-diene (6), and 1-selenenyl derivatives 7 and 8. This novel four-carbon homologation could be applied to a synthesis of 3,4,7,8-tetrakis(benzenesulfenyl)-10,10-dimethylundeca-2,4,6,8-tetraenal (20).
authors.affiliation: Department of Chemistry, Faculty of Education, Gifu University, Japan. yoshimae@cc.gifu-u.ac.jp
authors.forename: Mitsuhiro
authors.initials: M
authors.lastname: Yoshimatsu
authors.forename: Yasutaka
authors.initials: Y
authors.lastname: Matsuura
authors.forename: Kohei
authors.initials: K
authors.lastname: Gotoh
mesh_terms: D000447:Aldehydes / Q000138:chemical synthesis*; D008094:Lithium / Q000737:chemistry*; D018036:Selenium Compounds / Q000138:chemical synthesis*
chemical_list: D000447:Aldehydes; D018036:Selenium Compounds; D008094:Lithium