title: Rhodium-catalyzed regio- and stereoselective 1-seleno-2-thiolation of 1-alkynes.
abstract: Rhodium complex RhH(PPh(3))(4) and 1,1'-bis(diphenylphosphino)ferrocene catalyze the regio- and stereoselective additions of diaryl disulfides and diaryl diselenides to 1-alkynes giving (Z)-1-arylseleno-2-arylthio-1-alkenes. The catalyst promotes the addition reaction of dibutyl disulfide and dibutyl diselenide to 1-octyne with a similar selectivity giving (Z)-1-butylseleno-2-butylthio-1-octene but with a lower catalytic activity. The same product is obtained with a higher yield, when excess dibutyl disulfide is used against dibutyl diselenide in the presence of RhH(PPh(3))(4) and 1,4-diphenylphosphinobutane.
authors: Department of Organic Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Sendai 980-8578, Japan.
authors: Mieko
authors: M
authors: Arisawa
authors: Yoshihiro
authors: Y
authors: Kozuki
authors: Masahiko
authors: M
authors: Yamaguchi