The BF3-mediated nucleophilic addition of 2- and 4-methoxymethyl-2,4-pentadienylstannanes to aldehydes selectively gives the corresponding γ adducts, while the reaction with sterically hindered aldehydes affors the corresponding ε adducts regardless of the tin reagents applied.
BF3 介导的 2-和 4-甲氧基甲基-2,4-
戊二烯基
锡烷与醛的亲核加成反应可选择性地得到相应的 γ 加合物,而与立体受阻醛的反应则可得到相应的 ε 加合物,与所使用的
锡试剂无关。