A range of metathesis substrates was assembled from triplets of unsaturated building blocks. The approach involved the iterative attachment of a propagating and a terminating building block to a fluorous-tagged initiating building block. Metathesis cascade chemistry was used to "reprogram" the molecular scaffolds. Remarkably, in one case, a cyclopropanation reaction competed with the expected metathesis
一系列复分解底物由三联体不饱和结构单元组装而成。该方法涉及将传播和终止构建块迭代连接到带有
氟标记的起始构建块。复分解级联
化学用于“重新编程”分子支架。值得注意的是,在一种情况下,
环丙烷化反应与预期的复分解级联过程竞争。最后,证明复分解产物可以衍生以产生最终产物。在每个阶段,通过
氟标记保护基团的存在促进纯化。