Tautomerism and metal complexation of 2-acylmethyl-2-oxazolines: a combined synthetic, spectroscopic, crystallographic and theoretical treatment
作者:Roderick C. Jones、Khrystyna Herasymchuk、Tayseer Mahdi、Anna Petrov、Sanja Resanović、Douglas G. Vaughan、Alan J. Lough、J. Wilson Quail、Bryan D. Koivisto、R. Stephen Wylie、Robert A. Gossage
DOI:10.1039/c3ob25867j
日期:——
first synthesis and full characterisation of chiral derivative 3f. All four of these materials are shown to exist in the solid phase in the enamine tautomeric form (e.g., 3a is best described as 2-[4,4-dimethyl-2-oxazolidinylidene]-1-phenylethanone) and it is suggested (NMR, IR) that this isomeric form is likely also retained in solution (e.g., CDCl3) as the more stable isomer. An investigation of the relative
对六个2-酰基甲基-4,4-二甲基-2-恶唑啉的固态,溶液和气相结构进行了合成,结构和理论研究。这些材料中的四种,即。 α-[(4,5-二氢-4,4-二甲基-2-恶唑基)亚甲基]苯甲醇(3a),α-[(4,5-二氢-4,4-二甲基-2-恶唑基)亚甲基]-(4-硝基苯)甲醇(3b),1-(4,5-二氢-4,4- (二甲基-2-恶唑基)-3,3-二甲基-1-丁烯-2-醇(3d)和(E)-1-苯基-2-(((3a R)-3,3a,8,8a-四氢-2 H-茚并[1,2 - d ]恶唑-2-亚烷基]乙酮(3f)已通过单晶X射线衍射研究表征为固态。这些数据代表了这类化合物的首次固态结构研究,并详细介绍了手性衍生物3f的首次合成和完整表征。显示所有这四种材料均以烯胺互变异构形式存在于固相中(例如,3a最好描述为2- [4,4-二甲基-2-恶唑烷叉基] -1-苯基乙酮),并建议(NMR,IR)这种异构形式也可能保留在溶液中(例如,CDCl