The enediones (2) are useful starting materials for a two-step synthesis of tetrasubstituted furans, which are not otherwise easily available. Michael addition of active methylene compounds to the enediones (2) led to the two regioisomeric adducts (8) and (9), which then cyclized to furans under very mild conditions.
烯二酮(2)是用于四步合成的四取代
呋喃的两步合成的有用的起始原料,否则不容易获得。将活性亚甲基化合物迈克尔加成到二烯(2)上,产生两个区域异构加合物(8)和(9),然后在非常温和的条件下将其环化成
呋喃。