The potential of Song’s chiral oligoethylene glycols (oligoEGs) as catalysts was explored in the enantioselective protonation of trimethylsilyl enolethers in combination with alkali metal fluoride (KF and CsF) and in the presence of a proton source. Highly enantioselective protonations of various silylenolethers of α-substituted tetralones were achieved, producing chiral α-substituted tetralones
Levy, Annales de Chimie (Cachan, France), 1938, vol. <11> 9, p. 5,82
作者:Levy
DOI:——
日期:——
A concise total synthesis of brasiliquinones B and C and 3-deoxyrabelomycin
作者:Dipakranjan Mal、Harendra Nath Roy
DOI:10.1039/a905667j
日期:——
in 6–7 steps from the common precursor 18b. The key naphthalenones 6 were prepared in 5 steps from tetralone 17 in a regioselective manner. Anionic annulation of cyanophthalide 7c with 6 readily provided tetracyclic precursors 5 in excellent yields, sunlight-promoted photooxidation of which led to the synthesis of the title compounds.