Unexpected Products via Singlet Oxygen Oxygenation of Functionalized 5,6-Dihydro-1,4-oxathiins
作者:Flavio Cermola、Fulvio De Lorenzo、Federico Giordano、M. Liliana Graziano、M. Rosaria Iesce、Giovanni Palumbo
DOI:10.1021/ol000023i
日期:2000.5.1
[formula: see text] Single oxygen oxygenation of 5,6-dihydro-1,4-oxathiins substituted at C-3 with an electron-withdrawing group leads stereoselectively to ketosulfoxides 5 and 6, instead of the expected dicarbonyl compounds 3. A mechanism involving an unprecedented intramolecular rearrangement of the corresponding dioxetanes 2 is proposed.
[化学式:见正文]在C-3处被吸电子基团取代的5,6-二氢-1,4-氧杂i呤的单氧氧合立体选择性地导致酮亚砜5和6,而不是预期的二羰基化合物3。提出了涉及相应二氧杂环丁烷2的前所未有的分子内重排的方法。