Alumina-supported Molybdenum (VI) Oxide: An Efficient and Recyclable Heterogeneous Catalyst for Regioselective Ring Opening of Epoxides with Thiols, Acetic Anhydride, and Alcohols under Solvent-free Conditions
作者:Sweety Singhal、Suman L. Jain、Bir Sain
DOI:10.1246/cl.2008.620
日期:2008.6.5
An efficient and simple protocol for regioselective ring opening of epoxides with thiols, aceticanhydride, and alcohols using 16 wt % MoO3 supported on alumina as a recyclable catalyst is described.
One-pot synthesis of β-hydroxysulfides from styrenes and disulfides using the Zn/AlCl3 system
作者:Barahman Movassagh、Mozhgan Navidi
DOI:10.1016/j.tetlet.2008.09.071
日期:2008.11
A simple, general, and highly regioselective procedure has been developed for the one-potsynthesis of β-hydroxysulfides in good yields from various styrenes and disulfides by cleavage of the S–S bond with a Zn/AlCl3 system in aqueous acetonitrile at 80 °C and in the presence of oxygen.
(Bromodimethyl)sulfonium Bromide–Mediated Thiolysis of Epoxides: An Easy Access to β-Hydroxy Sulfides and Benzoxathiepinones in Solvent-Free Conditions
作者:M. Shailaja、A. Manjula、B. Vittal Rao
DOI:10.1080/00397910903458595
日期:2010.11.16
A mild, rapid and highly regioselective opening of epoxides by mercaptans to -hydroxy sulfides and benzoxathiepinones has been achieved in excellent yields, using catalytic amount of (bromodimethyl)sulfonium bromide in solvent free reaction conditions.
Additive Pummerer reactions of vinylic sulfoxides. Synthesis of γ-hydroxy-α,β-unsaturated esters, α-hydroxyketones, and 2-phenylsulfenyl aldehydes and primary alcohols
the E-isomers. β-Monosubstituted vinylic sulfoxides 1 possessing a β-aryl group, and β-disubstituted vinylic sulfoxides 3 reacted with trifluoromethanesulfonic anhydride-sodium acetate in acetic anhydride to give 2-(phenylsulfenyl)acylals 14. These gave 2-phenylsulfenyl aldehydes 15 upon basic methanolysis, and the corresponding primary alcohols 16 on reduction with sodium borohydride. Reaction of both