Cu(OTf)<sub>2</sub>-Catalyzed Pummerer Coupling of β-Ketosulfoxides
作者:Regev Parnes、Hagai Reiss、Doron Pappo
DOI:10.1021/acs.joc.7b02708
日期:2018.1.19
The copper(II) trifluoromethanesulfonate-catalyzed Pummerer reaction of β-ketosulfoxides with 1,3-dicarbonyl compounds or π-nucleophiles such as phenols, arenes, and tetraallylsilane is reported. The mild conditions provide an efficient entry to a novel class of polysubstituted 3-alkylthiofuran and polysubstituted 3-thiobenzofuran heterocycles from readily available materials.
The dehalogenation of phenacyl bromide by means of lower-oxidation-state metallic ions complexed by DMSO gives 1,2-dibenzoylethane. The by-products are 2,4-diphenylfuran and phenacyl chloride in the presence of Cu(I) chloride, whereas acetophenone and ω-acetoxyacetophenone are produced in the reaction with Cr(II) acetate. Treatment with K3Co(CN)5/DMSO gives 1,2-dibenzoylethane and acetophenone. The
Sulfenylation of β-keto sulfoxides. III. Diastereoselectivity induced by a chiral phase transfer catalyst
作者:Blanka Wladislaw、Liliana Marzorati、Francisco C. Biaggio、Reinaldo R. Vargas、Marcelo B. Bjorklund、Julio Zukerman-Schpector
DOI:10.1016/s0040-4020(99)00705-x
日期:1999.10
The asymmetric induction in the sulfenylation of several β-ketosulfoxides under phase transfer catalytic conditions in the presence of the chiral catalyst N-benzylquininium chloride was investigated. It is concluded that the diastereoselectivity is not accompanied by enantiomeric resolution.
Herstellung von Sulfiden durch Umsetzung von Sulfoxiden mit Hydrazin- oder Hydroxylaminderivaten oder ihren quartären Salzen.
Die nach dem Verfahren der Erfindung herstellbaren Sulfide sind wertvolle Ausgangsstoffe für die Herstellung von Pharmazeutika, Schädlingsbekämpfungsmitteln und Farbstoffen.