protonation with trifluoroacetic acid. In one case, a richly decorated cyclohepta[b]pyridine could be assembled swiftly by allowing the first adduct to N-phenylmaleimide to undergo addition to N-allylphthalimide prior to cyclization.
描述了基于收敛性自由基的氮杂茚满路线,其依赖于各种取代的S-(吡啶甲基)-O-乙基二硫代碳酸酯(黄原酸酯)的退化加成转移至功能性烯烃,然后自由基环化至吡啶环上,所述吡啶环通过用三氟乙酸质子化而活化。在一种情况下,一个富于装饰环庚并[ b ]吡啶,可以迅速地通过允许第一加合物组装Ñ苯基马来经历除了Ñ之前环化-allylphthalimide。
Generation and Intermolecular Additions of Pyridylmethyl Radicals
2-, 3-, or 4-Pyridylmethyl radicals can be made to add to nonactivated alkenes to give a variety of otherwise inaccessible pyridine derivatives. Bicyclic structures can be obtained by combining the radical addition with ionic ring-closure steps.