hydroalumination of methyl propiolate and Lewis-acid-promoted reaction with acetone in the presence of BF3 followed by two highly selective SN2′ reactions. The key step is the reaction of 2-(chloromethyl)acrylates with R2CuLi/ZnCl2 reagents which takes place with complete allylic rearrangement.
标题产物是通过有效的三步合成法制备的,该方法包括
丙三酸甲酯的氢铝化和在BF 3存在下与
丙酮进行
路易斯酸促进的反应,然后进行两个高度选择性的S N 2'反应。关键步骤是2-(
氯甲基)
丙烯酸酯与R 2 CuLi / ZnCl 2试剂的反应,该反应在完全烯丙基重排的情况下进行。