Pummerer Reaction of Sulfoxides in Acetic Anhydride Catalyzed by Al-MCM-41
作者:Suguru Ito、Yoshihiro Kubota、Masatoshi Asami
DOI:10.1246/cl.150896
日期:2016.1.5
The Pummerer reaction of acetic anhydride with both alkyl aryl sulfoxides and dialkyl sulfoxides was efficiently promoted by a mesoporous aluminosilicate Al-MCM-41 to afford the corresponding α-ace...
The displacement of a phenylthio group by an acetate ion in some allylic or α-alcoxy sulfides and thioacetals was cleanly performed by treating them with a mixture of copper powder and cupricacetate in aceticacid.
Direct α-acyloxylation of organic sulfides with the hypervalent (diacyloxyiodo)benzene/tetra-n-butylammonium bromide (TBAB) reagent combination
作者:Dan Zhu、Denghu Chang、Shaoyan Gan、Lei Shi
DOI:10.1039/c6ra01799a
日期:——
A novel metal-free approach to directly synthesize α-acyloxy sulfides from readily available alkyl sulfides utilizing the hypervalent (diacyloxyiodo)benzene and TBAB reagent combination is reported. This transformation is characterized by its broad substrate scope in moderate to excellent yields, convenient operating conditions and outstanding functional group tolerance.
Horner; Kaiser, Justus Liebigs Annalen der Chemie, 1959, vol. 626, p. 19,20,24
作者:Horner、Kaiser
DOI:——
日期:——
Medium and structure effects on the anodic oxidation of aryl arylmethyl sulfides
作者:Enrico Baciocchi、Cesare Rol、Emanuela Scamosci、Giovanni V. Sebastiani
DOI:10.1021/jo00019a005
日期:1991.9
The anodic oxidation of a number of XC6H4CH2SC6H4Y has been investigated under a variety of conditions (AcOH/AcO-,AcOH/NO3-,AcOH/ClO4-,CH3CN/ClO4-) and the relative weight of the various reaction paths available to the intermediate radical cation (C-alpha-H deprotonation, C-S bond cleavage, attack on sulfur) evaluated via product analysis. It has been observed that in AcOH/AcO- (presence of a strong base) the main reaction is C-alpha-H deprotonation, which is also favored when X is an electron-withdrawing substituent and depressed by electron-donating Y. The C-S bond cleavage reaction is particularly important in CH3CN/ClO4-; its relative contribution is enhanced by an electron-donating X, which makes the benzyl carbocation more stable. The pathway leading to sulfoxides is favored in AcOH/NO3- and, to a lesser extent, in AcOH/ClO4-. Formation of sulfoxide is also favored when Y is an electron-donating group.