Tm. Cokley et al., THE SOLVENT PROMOTED ADDITION OF TETRAALLYLTIN TO ALDEHYDES - A CONVENIENT AND CHEMOSELECTIVE ALLYLATION PROCEDURE, Tetrahedron letters, 37(11), 1996, pp. 1905-1908
Aldehydes 2a - e react with tetraallyltin (1,0.25 equiv.) in methanol
or other polar solvent at room temperature (ca 30 degrees C, <20 h) to
provide the corresponding homoallyl alcohols 3a - e in 69 - 98% yield
. No additional catalysis is required.