A One-Pot Preparation of Aryl- and Heteroarylcycloalkenes: Application to the Total Synthesis of (±)-Laurokamurene B
作者:Frédéric Lecornué、Jean Tallineau、Georges Bashiardes、Jean-Marie Coustard
DOI:10.1055/s-0029-1217964
日期:2009.10
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。