Rj. Linderman et Sy. Chen, DIASTEREOSELECTIVE ADDITIONS OF COPPER(I) AND CUPRATE REAGENTS TO ALPHA-STANNYL SUBSTITUTED MIXED ACETALS, Tetrahedron letters, 36(43), 1995, pp. 7799-7802
Precursors for sigmatropic rearrangements are available by diastereose
lective nucleophilic addition reactions of vinyl copper species to tri
butylstannyl substituted mixed acetals.