Switch of Addition and Ring-Opening Reactions of Oxabicyclic Alkenes with Terminal Alkynes by sp<sup>2</sup>-C,P- and sp<sup>3</sup>-C,P-Palladacycle Catalysis
Palladacycles were found to be efficient catalysts for the reaction of oxabicyclic alkenes with terminalalkynes. A switch of reaction selectivity was realized using a palladacycle with an sp2 or sp3 C–Pd bond. Addition products were afforded predominantly using a palladacycle with an sp3 C–Pd bond, while ring-opening compounds were the major products when palladacycles having an sp2 C–Pd bond were
ASYMETRIC SYNTHESIS OF NORCANTHARIDIN ANALOUGUS BY ALKYNYLATION OF OXABENZONORBORNADIENES AND THEIR ANTICANCER ACTIVITIES
申请人:HONG KONG BAPTIST UNIVERSITY
公开号:US20140187801A1
公开(公告)日:2014-07-03
The present invention relates to a type of norcantharidin analogues and a method to synthesis such norcantharidin analogues by transition metal-catalyzed alkynylation of 7-oxabenzonorbornadienes. The present invention also relates to the use of such norcantharidin analogues in manufacture of a medicament for the treatment of cancer tumors.