Sodium Iodide-Catalyzed Direct α-Alkoxylation of Ketones with Alcohols<i>via</i>Oxidation of α-Iodo Ketone Intermediates
作者:Cuiju Zhu、Yuanfei Zhang、Huaiqing Zhao、Shijun Huang、Min Zhang、Weiping Su
DOI:10.1002/adsc.201500006
日期:2015.2.9
AbstractThe direct α‐alkoxylation of ketones with alcohols via a sodium iodide‐catalyzed oxidative cross‐coupling has been developed. This protocol enables a range of alkyl aryl ketones to cross‐couple with an array of alcohols in synthetically useful yields. The mechanistic studies provided solid evidence supporting that an α‐iodo ketone was a key reaction intermediate, being converted into an α‐alkoxylated ketone via further oxidation to a hypervalent iodine species rather than a common nucleophilic substitution, and was generated from the ketone starting material via a radical intermediate. These new mechanism insights should have an effect on the design of iodide‐catalyzed oxidative cross‐coupling reactions between nucleophiles.magnified image
Photochemistry of substituted propiophenones: An interesting α-and aryl substituents effect on their photobehaviour I,II
作者:Harikisan R. Sonawane、Nanjundiah S. Bellur、G.M. Nazeruddin
DOI:10.1016/0040-4020(95)00690-a
日期:1995.10
Photochemistry of different α-substituted and phenyl-substituted propiophenones in methanol is investigated with a view to delineate the substituent effect with a special reference tu their rearrangement to α-arylpropanoic acids, an important class of nonsteroidal antiinflammatory agents. The results thus obtained bringsforth an important element of their reactivityprofile i.e. the α-chloro-substituent