Ethyl Glyoxylate <i>N</i>-Tosylhydrazone as Sulfonyl-Transfer Reagent in Base-Catalyzed Sulfa-Michael Reactions
作者:Maitane Fernández、Uxue Uria、Lucia Orbe、Jose L. Vicario、Efraím Reyes、Luisa Carrillo
DOI:10.1021/jo402518q
日期:2014.1.3
Ethyl glyoxylate N-tosylhydrazone has been identified as an excellent sulfonyl anion surrogate in the DBU-catalyzed conjugate addition reaction with enones and enals for the synthesis of functionalized sulfones. The reaction proceeds under base-catalyzed conditions and provides a direct access to γ-keto- and γ-hydroxy sulfones in a simple and reliable way through a sulfa-Michael reaction that proceeds
A study of the intramolecular cyclization reactions of some derivatives of 3-arylsulfonyl cycloalkanols
作者:Stephen S Gonzales、Hollie K Jacobs、LuAnne E Juarros、Aravamudan S Gopalan
DOI:10.1016/0040-4039(96)01535-3
日期:1996.9
Carbonate and acyl derivatives of 3-arylsulfonylcyclohexanols and heptanols, upon deprotonation with LHMDS in THF at −78°C, undergo an intramolecular cyclization reaction to give bicyclic lactones or the corresponding acyl transfer products in synthetically useful yields. In contrast, the corresponding cyclopentyl derivatives show different reactivity.