作者:Giampietro Cum、Placido Giannetto、Giovanni Sindona、Nicola Uccella
DOI:10.1016/s0040-4020(01)93689-0
日期:1980.1
behaviour of substituted 1,3-oxazolidin-2-ones (1) and 1,3-oxazolin-2-ones (2) on treatment with acid is reported. Electrophylic addition of iminium cations to 1,3-oxazolin-2-onic monomers occurs, yielding the kinetically preferred dimers (3). The elimination pathway to 3 is in direct competition with the formation of the cyclodimerisation products resulting from a thermodynamically controlled process.
据报道,取代的1,3-恶唑烷-2-酮(1)和1,3-恶唑啉-2-酮(2)在用酸处理时的行为。发生亚胺阳离子向1,3-恶唑啉-2-基单体的电性加成,产生动力学上优选的二聚体(3)。到3的消除途径与由热力学控制的过程形成的环二聚产物的形成直接竞争。在X射线分析的基础上讨论了环二聚体的立体化学。使用氘标记实验讨论了对总反应和NMR特性的定性能量考虑。