α-Substitution plus Carbonyl Olefination via β-Oxido Phosphorus Ylids (S. C. O. O. P. Y.-Reactions) Scope and Stereoselectivity

Consecutive treatment of HOCH2CH2P+Ph3 Br- with BuLi, BzH, BuLi, and H2O afforded trans-PhCH:CHCH2OH in 95% isomeric purity and PhCH(OH)CH:CH2. The stereospecificity of the S.C.O.O.P.Y.-reactions (Schlosser, M. and Christmann, F. K., 1969) is discussed. [on SciFinder (R)]