A substituent-controlled general approach to access arylated pyran-2-ones and pyrano[3,4-c]pyran-1,8-diones
作者:Fateh V. Singh、Manish Dixit、Sumit Chaurasia、Resmi Raghunandan、Prakas R. Maulik、Atul Goel
DOI:10.1016/j.tetlet.2007.10.095
日期:2007.12
2H-Pyran-2-ones are useful precursors for the synthesis of various aromatic and heterocyclic compounds. In this Letter, we describe substituent-controlled direct access to functionalized 4-(2-oxo-1,2-diarylethyl)-5,6-diaryl-pyran-2-ones by stirring a mixture of 3-cyano-5,6-diaryl-2H-pyran-2-ones and functionalized deoxybenzoins through an unusual decyanation reaction. Under similar reaction conditions
2 H-吡喃-2-酮是用于合成各种芳族和杂环化合物的有用前体。在这封信中,我们描述了通过搅拌3-氰基-5,6的混合物,通过取代基控制的直接访问官能化的4-(2-氧代-1,2-二芳基乙基)-5,6-二芳基-吡喃-2-酮-二芳基-2 H-吡喃-2-酮和官能化的脱氧安息香素通过异常的脱氰反应。在相似的反应条件下,3-羰基甲氧基-5,6-二芳基-2 H-吡喃-2-酮与取代的苯乙酮或脱氧苯偶姻的反应导致吡喃并[3,4- c ]吡喃-1,8的合成-二酮具有极好的收率。