Ring-closing metathesis for the synthesis of heteroaromatics: evaluating routes to pyridines and pyridazines
作者:Timothy J. Donohoe、John F. Bower、José A. Basutto、Lisa P. Fishlock、Panayiotis A. Procopiou、Cedric K.A. Callens
DOI:10.1016/j.tet.2009.07.076
日期:2009.10
Ring-closing olefin metathesis (RCM) has been applied to the efficient synthesis of densely and diversely substituted pyridine and pyridazine frameworks. Routes to suitable metathesis precursors have been investigated and the scope of the metathesis step has been probed. The metathesis products function as precursors to the target heteroaromatic structures via elimination of a suitable leaving group, which
闭环烯烃复分解(RCM)已用于稠密和不同取代的吡啶和哒嗪骨架的有效合成。已经研究了合适的复分解前体的途径,并探讨了复分解步骤的范围。复分解产物通过消除合适的离去基团而充当目标杂芳族结构的前体,这还通过充当氮上的保护基团而促进了较早的步骤。在芳构化之前和之后,复分解产物的进一步功能化都是可能的。最终结果是强有力的从头合成高度取代的杂芳族骨架的策略。