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首页> 外文期刊>Acta Crystallographica Section E: Crystallographic Communications >Unusual formation of (E)-11-(amino­methyl­ene)-8,9,10,11-tetra­hydro­pyrido[2′,3′:4,5]pyrimido[1,2-a]azepin-5(7H)-one and its crystal structure
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Unusual formation of (E)-11-(amino­methyl­ene)-8,9,10,11-tetra­hydro­pyrido[2′,3′:4,5]pyrimido[1,2-a]azepin-5(7H)-one and its crystal structure

机译:(E)-11-(氨基亚甲基)-8,9,10,11-四氢吡啶并[2',3':4,5]嘧啶[1,2-a]氮杂环庚烷-5(7H)-的异常形成它的晶体结构

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摘要

Selective C-formyl­ation of 8,9,10,11-tetra­hydro­pyrido[2′,3′:4,5]pyrimido[1,2-a]-azepin-5(7H)-one has been studied for the first time. It was revealed that formyl­ation proceeds by the formation of an inter­mediate salt, which due to the re-amination process on treatment with aqueous ammonia transformed into the corresponding (E)-11-(amino­methyl­ene)-8,9,10,11-tetra­hydro­pyrido[2′,3′:4,5]-pyrimido[1,2-a]azepin-5(7H)-one, C13H14N4O, as an E-isomer. Formyl­ation was carried out by Vilsmeier–Haack reagent and the structure of the synthesized compound was confirmed by X-ray structural analysis, spectroscopic and LC–MS methods. In the mol­ecule, the seven-membered penta­methyl­ene ring adopts a twist-boat conformation.
机译:首次研究了8,9,10,11-四氢吡啶并[2',3':4,5]嘧啶并[1,2-a]-氮杂5(7H)-的选择性C-甲酰基化。揭示了甲酰化通过形成中间盐而进行,这是由于用氨水处理后的再胺化过程转化成相应的(E)-11-(氨基亚甲基)-8,9,10,11-四氢吡啶基[2',3':4,5]-嘧啶基[1,2-a]氮杂-5(7H)-1,C13H14N4O,为E-异构体。用Vilsmeier-Haack试剂进行甲酰化,并通过X射线结构分析,光谱法和LC-MS方法确认合成化合物的结构。在分子中,七元五亚甲基环采用扭转舟构象。

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