A series of 2-arylfuro[3,2-c]pyridines was synthesized. 3-(5-Aryl-2-furyl)propenoic acids 1a-1h were converted to the acid azides 2a-2h, which in turn were cyclized to give 2-arylfuro[3,2-c]pyridine-4(5H)-ones 4a-4h by heating in Dowtherm. The pyridones 4a-4f were aromatized with phosphorus oxychloride to the 2-aryl-4-chlorofuro[3,2-c]pyridines 5a-5f, which were reduced with zinc and acetic acid to the title compounds 6a-6f. Reacted with phosphorus(V) sulfide, the pyridones 4a-4f yielded the corresponding thiones 7a-7f.
合成了一系列2-芳基呋喃[3,2-c]吡啶化合物。3-(5-芳基-2-呋喃基)丙烯酸1a-1h被转化为酸叠氮化物2a-2h,然后经过环化反应在Dowtherm中加热得到2-芳基呋喃[3,2-c]吡啶-4(5H)-酮4a-4h。吡啶酮4a-4f经过磷氯氧化物芳构化为2-芳基-4-氯呋喃[3,2-c]吡啶5a-5f,再用锌和乙酸还原为目标化合物6a-6f。与五氧化二磷反应,吡啶酮4a-4f生成相应的硫醚7a-7f。