Highly Selective Sulfoxidation of Allylic and Vinylic Sulfides by Hydrogen Peroxide Using a Flavin as Catalyst
作者:Auri A. Lindén、Lars Krüger、Jan-E. Bäckvall
DOI:10.1021/jo034273z
日期:2003.7.1
sulfone was detected). No epoxidation of double bonds or interference with other functional groups was observed under the reaction conditions. The general applicability was demonstrated by the selective oxidation of various allylic and vinylic sulfides having different electronic properties. A number of functionalities including hydroxy, acetoxy, amino, silyloxy, and formyl groups are tolerated under these
The reaction of cyclic sulfides with benzyne generated from 2-carboxybenzenediazonium chloride affords ω-chloroalkyl phenyl sulfides in good yields. A similar type of reaction was also observed with acyclic sulfides.
2,3-Sigmatropic Rearrangement of Sulfonium Ylides Generated by Addition of Samarium Carbenoids
作者:Munetaka Kunishima、Daisuke Nakata、Chikako Goto、Kazuhito Hioki、Shohei Tani
DOI:10.1055/s-1998-1979
日期:1998.12
Allylic sulfides are transformed into homoallylic sulfides with complete allylic inversion by treatment with SmI2 and CH2I2 in THF. The reaction will involve allylic sulfonium ylides as an intermediate, which undergoes 2,3-rearrangement.
Chemoselective sulfur oxidation of allylic sulfides containing double bonds of high electron density due to multiple alkyl substituents or extended conjugation was developed using the composite metal oxidecatalyst, LiNbMoO(6), without any epoxidation of the electron-rich double bond(s). Selectiveoxidation to either the corresponding sulfoxides or the sulfones was realized by controlling the stoichiometry
Stereoselective synthesis of substituted 1,3,5-hexatrienes from diallylic sulfones
作者:Xiao-Ping Cao、Tze-Lock Chan、Hak-Fun Chow、Jingren Tu
DOI:10.1039/c39950001297
日期:——
Substituted 1,3,5-hexatrienes 7 can be prepared in excellent yields and with good stereoselectivity from diallylic sulfones 6 employing a modified Ramberg–Bäcklund reaction.