Synthesis and use of (E)-1-ethoxy-3-fluoroalkyl-3-hydroxy-4-(4-methylphenylsulfinyl)but-1-enes
作者:Pierfrancesco Bravo、Luca Bruché、Alessandra Farina、Igor I. Gerus、Maria T. Kolytcheva、Valery P. Kukhar、Stefano Valdo Meille、Fiorenza Viani
DOI:10.1039/p19950001667
日期:——
Condensation of the lithium salt of (R)-methyl p-tolyl sulfoxide 1 with fluorinated alpha,beta-unsaturated ketones 2 leads to (3R/S,R(s),)-(E)-1-ethoxy-3-fluoroalkyl-3-hydroxy-4-(4-methylphenylsulfinyl)but-1-enes 3, whose absolute stereochemistry was determined by X-ray diffraction and NMR analyses. Reductive removal of the sulfinyl chiral auxiliary allows the preparation of both enantiomers of fluorinated tertiary alcohols of type 8 and 9.