Brønsted Acids Enable Three Molecular Rearrangements of One 3-Alkylidene-2<i>H</i>-1,2-oxazine Molecule into Distinct Heterocyles
作者:Bhanudas Dattatray Mokar、Jinxian Liu、Rai-Shung Liu
DOI:10.1021/acs.orglett.7b03985
日期:2018.2.16
This work describes three different strategies to structurally rearrange one 3-alkylidene-2H-1,2-oxazine molecule into three distinct heterocycles using HOTf, propiolic acid, and silica gel, respectively. The mechanisms of these rearrangement reactions involve three independent routes, including (i) Brønsted acid catalysis, (ii) a synergetic action of Brønsted acids and anions, (iii) a surface-directed
这项工作描述了三种不同的策略,分别使用HOTf,丙酸和硅胶将一个3-亚烷基-2 H -1,2-恶嗪分子结构重排成三个不同的杂环。这些重排反应的机理涉及三个独立的途径,包括(i)布朗斯台德酸催化,(ii)布朗斯台德酸和阴离子的协同作用,(iii)表面定向的化学选择性。