An expeditious synthesis of α-substituted tert-butyl acrylates from commercially available aldehydes and Meldrum’s acid has been established. The method benefits from a telescoped condensation-reduction sequence to afford 5-monosubstituted Meldrum’s acid derivatives followed by a Mannich-type reaction triggered by a rapid cycloreversion of the dioxinone ring on heating with tert-butyl alcohol.
已建立了一种从商业可得的醛和Meldrum酸快速合成α-取代叔丁基
丙烯酸酯的方法。该方法通过叠缩-还原序列实现,先得到5-单取代的Meldrum酸衍
生物,然后在加热条件下与
叔丁醇发生曼尼希型反应,触发快速环转化反应,从而形成二氧
环己酮环。