作者:M.F. Semmelhack、Richmond Sarpong、Jeffrey Bergman、Douglas M. Ho
DOI:10.1016/s0040-4039(01)02139-6
日期:2002.1
non-conjugated-to-conjugated double bond isomerization as a triggering mechanism for a calicheamicin model was tested. A bicyclo[7.3.1] enediyne framework was prepared with a bridgehead double bond and an acetonyl side chain. Base-promoted exchange failed to produce the conjugated isomer. Computational analysis suggested that additional conjugating groups would favor the isomerization, but experiment proved that
测试了非共轭至共轭双键异构化作为加利车霉素模型触发机制的概念。制备了具有桥头双键和乙炔基侧链的双环[7.3.1]二烯炔骨架。碱促进的交换不能产生共轭异构体。计算分析表明,额外的共轭基团将有利于异构化,但实验证明这是不正确的。