Rationalisation of Patterns of Competing Reactivity by X-ray Structure Determination: Reaction of Isomeric (Benzyloxythienyl)oxazolines with a Base
作者:R. Alan Aitken、Andrew D. Harper、Alexandra M. Z. Slawin
DOI:10.3390/molecules26247690
日期:——
either Wittig rearrangement or intramolecular attack of the benzylic anion on the oxazoline function to give products derived from cleavage of the initially formed 3-aminothienofuran products. This pattern of reactivity is directly linked to the distance between the two reactive groups as determined by X-ray diffraction, with the greatest distance in 11 leading to exclusive Wittig rearrangement, the shortest
三个异构体(benzyloxythienyl)恶唑啉9,11和13已被制备并发现,当治疗用强碱,接受对恶唑啉函数要么维蒂希重排或苄基阴离子的分子内攻击,得到从最初裂解衍生的产物形成3-氨基噻吩并产物。这种反应模式与通过 X 射线衍射确定的两个反应基团之间的距离直接相关,11 个中的最大距离导致唯一的 Wittig 重排,13 个中的最短距离仅提供环化衍生产物,中间体距离在9导致这两个过程都被观察到。在两种情况下也获得了相应的N-丁基酰胺,其中一种经过有效的 Wittig 重排,产生了噻吩并 [2,3- c ] 吡咯酮产物。