Solid State and Solution Structures ofO-Alkyl- and ofO-Acyl Derivatives of 1-Hydroxypyridine-2(1H)-thione
作者:Jens Hartung、Margit Hiller、Michaela Schwarz、Ingrid Svoboda、Hartmut Fuess
DOI:10.1002/jlac.199619961222
日期:1996.12
radical precursors, the O-acyl derivatives of 1-hydroxypyridine-2(1H)-thione 2, have been studied in detail for more than a decade, to date nothing has been reported on the solid state or the solution geometries of these molecules or the analogous oxo derivatives, the pyridones 7, 8. In view of this, selected O-alkyl and O-acyl derivatives of pyridinethiones and of 2-(1H)pyridones have been prepared
尽管已经对Barton的自由基前体(1-羟基吡啶-2(1 H)-硫酮2的O-酰基衍生物)进行了十多年的详细研究,但迄今为止,尚无关于其固态或溶液几何形状的报道。这些分子或类似的羰基合成衍生物,吡啶酮7、8。鉴于此,已经制备了吡啶硫酮和2-(1H)吡啶酮的选定的O-烷基和O-酰基衍生物,并通过X射线衍射和NMR(COSY,NOE)实验进行了研究。X射线数据表明杂环2d,3b,7b和8的碳骨架中的交替键长和长NO键[1.394(4)–1.398(2)Å]。在所有研究的化合物中,O-烷基和O-酰基均被扭曲到杂环平面之外,这符合VSEPR的概念。此外,通过差示扫描量热法(DSC)研究了硫代异羟肟酸衍生物2、3和取代的吡啶酮7、8的热稳定性。