Citation: S. Sumida et al., New and stereoselective synthesis of 1,4-disubstituted buten-4-ols (homoallylic alcohol alpha-adducts) from the corresponding gamma-isomers (3,4-disubstituted buten-4-ols) via an acid-catalyzed allyl-transfer reaction with aldehydes, J AM CHEM S, 122(7), 2000, pp. 1310-1313