Selective synthesis and stabilization of peroxides<i>via</i>phosphine oxides
作者:Fabian F. Arp、Shin Hye Ahn、Nattamai Bhuvanesh、Janet Blümel
DOI:10.1039/c9nj04858h
日期:——
ethane dioxide) with butanone and hydrogen peroxide. This peroxide is stabilized by forming strong hydrogen bonds to the phosphine oxide groups within an extended network, which has been characterized by single crystal X-ray diffraction. Reaction of acetylacetone with hydrogen peroxide, irrespective of the presence of phosphine oxide, leads to the stereoselective formation of two dioxolanes. Both cyclic
Oxidative Cleavage of C=C Bonds with Singlet Molecular Oxygen Generated from Monoacetylated Bishydroperoxides
作者:Davood Azarifar、Zohreh Najminejad
DOI:10.1055/s-0033-1338947
日期:——
The oxidative cleavage of C=C bonds adjacent to aryl and alkyl moieties was efficiently achieved with monoacetylated bishydroperoxides. The main active oxidant used in this reaction was singlet molecular oxygen, which was generated in situ from the base-mediated fragmentation of monoacetylated bishydroperoxides. All the reactions proceeded smoothly at room temperature to furnish the respective carbonyl compounds in good yields within short reaction times.
Organocatalytic sulfoxidation
作者:Stuart C. Davidson、Gabriel dos Passos Gomes、Leah R. Kuhn、Igor V. Alabugin、Alan R. Kennedy、Nicholas C.O. Tomkinson
DOI:10.1016/j.tet.2020.131784
日期:2021.1
Treatment of a sulfide with a catalytic amount of a 1,3-diketone in the presence of silica sulfuric acid as a co-catalyst and hydrogen peroxide (50% aq) as the stoichiometric oxidant leads to the corresponding sulfoxide product. The reaction is effective for diaryl, aryl-alkyl and dialkyl sulfides and is tolerant of oxidisable and acid sensitive functional groups. Investigations have shown that the