New and efficient RCM in pyridinic series: synthesis of 2H-dihydropyrano- or 2,3H-dihydrooxepino[3,2-b]pyridines
作者:Estelle Banaszak、Corinne Comoy、Yves Fort
DOI:10.1016/j.tetlet.2006.06.139
日期:2006.8
A new and very efficient route to polycyclic heterocycles with isosteric replacement of benzene by pyridine is reported. This strategy involving the RCM reaction in pyridinic series as a keystep allows us to prepare 2H-dihydropyrano- or 2,3H-dihydrooxepino[3,2-b]pyridines 1 and 2 in very good overall yields (47% and 44%, respectively).
报道了一种新的非常有效的途径,用吡啶将苯等位取代,形成了多环杂环。该策略涉及吡啶系列的RCM反应,这使我们能够以非常好的总收率(47%和44%)制备2 H-二氢吡喃基或2,3 H-二氢氧庚啶[3,2- b ]吡啶1和2。 , 分别)。