Bimacrocyclic Pyridines and 1,8-Naphthyridines: Basicities and Application in Base Catalysis
作者:Ulrich Lüning、Timo Liebig
DOI:10.1055/s-0034-1378384
日期:——
can be coupled with 2,6-bis(alkenyloxy) substituted areneboronic acids. The resulting tetraenes are then cyclized by ring-closing metathesis to give bimacrocyclic concave pyridines or concave 1,8-naphthyridines. The relative basicity of the concave N-heterocycles was measured and their activity and selectivity was tested in the base-catalyzed addition of alcohols to diphenylketene. Di-α-substituted
摘要 二α-取代的N-杂环,例如2,6-卤代吡啶或2,7-二氯-1,8-萘吡啶可与2,6-双(烯氧基)取代的芳硼酸偶联。然后通过闭环易位使所得的四烯环化,得到双大环的凹吡啶或凹的1,8-萘啶。测量了凹N-杂环的相对碱性,并在碱催化的醇加至二苯基乙烯酮中测试了它们的活性和选择性。 二α-取代的N-杂环,例如2,6-卤代吡啶或2,7-二氯-1,8-萘吡啶可与2,6-双(烯氧基)取代的芳硼酸偶联。然后通过闭环易位使所得的四烯环化,得到双大环的凹吡啶或凹的1,8-萘啶。测量了凹N-杂环的相对碱性,并在碱催化的醇加至二苯基乙烯酮中测试了它们的活性和选择性。