Reactivity of (3-chloro-2-methylenecycloalkyl)pallladium chloride dimers: a palladium mediated ring homologation--functionalization approach to the AR-7-7 skeleton of colchicine
作者:William A. onaldson、Daniel J. tepuszek、James A. ruetzmacher
DOI:10.1016/s0040-4020(01)82008-1
日期:1990.1
A palladium mediated ring homologation--functionalization approach to the Ar-7-7 tricyclic skeleton of colchicine from 1-arylcyclohexenes is described. This methodology involves the chloropalladation of 1-aryl-7-methylenebicyclo[4.1.0]heptanes to afford aryl substituted (3-chloro-2-methylenecycloheptyl)palladium chloride dimers. Reaction of the π-allyl complexes with one equivalent of malonate anion
描述了从1-芳基环己烯到秋水仙碱的Ar-7-7三环骨架的钯介导的环同源-官能化方法。该方法涉及1-芳基-7-亚甲基双环[4.1.0]庚烷的氯钯化,得到芳基取代的(3-氯-2-亚甲基环庚基)氯化钯二聚体。π-烯丙基配合物与一当量的丙二酸根阴离子反应,得到环庚二烯产物。随后的还原和分子内酰化产生Ar-7-7骨架