isonitriles provides tetra- and penta-cyclic products in a single step by a sequence of radical addition to the isonitrile followed by two cyclizations. The scope and limitations of the process are described along with a first generation synthesis of racemic camptothecin.
在芳基异腈存在下,对N-炔丙基-6-卤代-2-
吡啶酮和相关的芳族卤化物进行光解可通过一步向异腈中进行一系列自由基加成,然后进行两次环化,一步即可提供四环和五环产物。描述了该方法的范围和局限性以及外消旋
喜树碱的第一代合成方法。