Fused Heterocyclic Systems Derived from 2,6-Diaryl-3,5-dibenzylidenetetrahydro-4<i>H</i>-thiopyran-4-ones
作者:Abdel Moneim El-Ghanam
DOI:10.1080/10426500500328905
日期:2006.7.1
3-c]pyrazole and thiopyrano[4,3-d]pyrimidine derivatives, respectively. Also, the reaction of dibenzylidenetetrahydrothiopyran-4-ones with malononitrile in piperidine and malononitrile in ammonim acetate afforded thiopyrano[4,3-b]pyran and thiopyrano[4,3-b]pyridine derivatives, respectively, while treatment with ethyl acetoacetate gave acetyl thiopyrano[4,3-b]pyran derivatives. On the other hand, treatment of
2,6-二苯基和 2,6-di-p-tolyltetrahydro-4H-thiopyran-4-ones 与苯甲醛反应得到 2,6-diphenyl 和 2,6-di-p-tolyl-3,5-dibenzy -lidenetetrahydro-4H-thiopyran-4-ones,用盐酸羟胺、水合肼和硫脲处理,得到噻喃[4,3-c]异恶唑、噻喃[4,3-c]吡唑和噻喃[4,3] -d]嘧啶衍生物,分别。此外,二亚苄基四氢噻喃-4-酮与哌啶中的丙二腈和乙酸铵中的丙二腈反应分别得到噻喃[4,3-b]吡喃和吡喃并[4,3-b]吡啶衍生物,而用乙酰乙酸乙酯处理得到乙酰基吡喃并[4,3-b]吡喃衍生物。另一方面,2,6-二苯基和2的处理,6-di-p-tolyltetrahydro-4H-thiopyran-4-ones 与元素硫和丙二腈在二乙胺存在下得到噻吩并 [2,3-c] 噻喃衍生物。所有