Epoxide as an aldehyde equivalent in allyl-transfer reaction with γ-adduct of homoallylic alcohol (allyl donor) giving α-adduct of homoallylic alcohol

Acid-catalyzed reactions of epoxides 2 with homoallylic alcohol γ-adducts, 1 [Me2C(OH)CHRCHdouble bond; length as m-dashCH2], afford homoallylic alcohol α-adducts 3–5 via allyl-transfer reaction, sometimes being more effective than those using the corresponding aldehydes.