A one-pot method for the selective synthesis of twoisomers 4H-chromene and 2,8-dioxabicyclo[3.3.1]nonane derivatives was developed without a catalyst and using EtOH/H2O (4:1, v/v) as the solvent. The reaction was conducted under mild conditions, with forming multiple chemical bonds in one pot and high atom economy, and only a stoichiometric amount of H2O is produced as the byproduct. Its selectivity
开发了一种选择性合成两种异构体 4 H -色烯和 2,8-二氧杂双环 [3.3.1] 壬烷衍生物的一锅法,无需催化剂,使用 EtOH/H 2 O (4:1, v/v)作为溶剂。该反应在温和的条件下进行,一锅形成多个化学键,原子经济性高,副产物仅产生化学计量的H 2 O。其选择性受热力学和动力学控制,并讨论了两种结构发生转变的原因。