heterocycles. Structurally diverse isoxazolopyridines 6 and isoxazolopyrans 9, including base-labile 3-unsubstituted derivatives, were synthesized in good to high yields. The addition of N-phenylbenzaldimine as a hydrogen acceptor improved yields in the synthesis of isoxazolopyridines. Furthermore, synthesis of the tetracyclic fused ring system 12 was achieved by tandem cyclization from the corresponding
分子内电芳族取代(S Ë在
异恶唑的5位上的Ar)反应来实现。
异恶唑4位上的供电子杂原子(N和O)可以根据我们最初开发的合成方法轻松制备,阳离子
金(I)催化剂对于分子内S E Ar反应的合成至关重要含
异恶唑的稠合杂环。结构良好的高收率合成了结构多样的
异恶唑烷吡啶6和
异恶唑并
吡喃9,包括对碱不稳定的3-未取代的衍
生物。N的加法-苯基苯扎二胺作为氢受体可提高
异恶唑烷吡啶的合成产率。此外,四环稠环系统12的合成是通过串联二环化从相应的二炔11实现的。