A general one-pot method has been developed for the preparation of various aryl- and heteroarylcycloalkenes. After lithiation of aryl and heteroaryl bromides followed by transmetalation with CeCl3, the organocerium addition to cycloalkanones proceeds cleanly to provide the intermediate alkoxide. Addition of MsCl or SOCl2 with DBU gave aryl-substituted cycloalkenes in good yields. A short total synthesis of (±)-laurokamurene B making use of this reaction is described.
开发了一种通用的一锅法,用于制备各种苯基和杂芳基环�烯。首先将苯基和杂芳基
溴化物进行
锂化,然后通过与
CeCl3进行反
金属化反应,接着与环烷酮进行有机
铈加成,此过程顺利进行,得到中间体烷氧化物。添加MsCl或SOCl2与
DBU后,以良好收率得到了苯基取代的环烷烯。此外,还描述了利用此反应实现(±)-laurokamurene B的简短全合成。