838851-03-9Relevant articles and documents
A general stereoselective method for the synthesis of cyclopropanecarboxylates. A new version of the homologous Horner-Wadsworth- Emmons reaction
Krawczyk, Henryk,Wasek, Katarzyna,Kedzia, Jacek,Wojciechowski, Jakub,Wolf, Wojciech M.
, p. 308 - 318 (2008/09/21)
The synthesis of α-, β- and γ-substituted α-phosphono-γ-lactones was accomplished using different ring closure and ring homologation strategies. It was found that the lactones could be selectively transformed into the corresponding ethyl cyclopropanecarboxylates by treatment with sodium ethoxide in boiling THF. The reported reaction provides an attractive alternative to the classical homologous Horner-Wadsworth-Emmons approach to the construction of cyclopropanes with electron-withdrawing functionalities. This journal is The Royal Society of Chemistry.
2-Diethoxyphosphoryl-4-nitroalkanoates - Versatile intermediates in the synthesis of α-alkylidene-γ-lactones and lactams
B?aszczyk, Edyta,Krawczyk, Henryk,Janecki, Tomasz
, p. 2685 - 2688 (2007/10/03)
Michael addition of various nitroalkanes 7a-f to ethyl (2- diethoxyphosphoryl)acrylate (6) gave 2-diethoxyphosphoryl-4-nitroalkanoates 8a-f. Transformation of the nitro functionality into hydroxy or amino group and cyclization yielded 3-(diethoxyphosphory