conjugate additions between 1-(trimethylsilyl)allene-1-carboxylates and Grignard reagents in good to excellent yields. The use of Et2O as solvent for Grignard reagents was found to be very important for the diastereoselectivity of the reaction. Applications of the prepared allylic silanes for the stereocontrolled synthesis of α,β-alkenoates, a β,γ-alkenoate, and an allylic fluoride have been demonstrated
立体定义的多取代 α-(甲
氧基羰基)
烯丙基
硅烷是通过
铁催化的 1-(三
甲基甲
硅烷基)
丙二烯-1-
羧酸盐和
格氏试剂之间的共轭加成以良好到极好的产率合成的。发现使用 Et2O 作为
格氏试剂的溶剂对于反应的非对映选择性非常重要。制备的
烯丙基
硅烷在α,β-
烯酸
酯、β,γ-
烯酸
酯和
烯丙基
氟化物的立体控制合成中的应用已经得到证实。