REACTION OF SPIRO WITH GRIGNARD REAGENTS IN THE PRESENCE OF CUPROUS CHLORIDE
Attack of MeMgI and PhMgBr in toluene on spiro (1) in the presence of Cu2Cl2 gives 2'-substituted spiro in quantitative yields.Also, attack of PhCH2CH2MgBr on 1 in the presence of Cu2Cl2 afforded 2'-phenethyl, 2'-H and 2'-benzyl (or 2'-p-xylyl) derivatives in toluene (or p-xylene) as solvent.
Rodriguez, Gonzalo,Benito, Yolanda,Temprano, Fernando