作者:Kenneth N. Boblak、Douglas A. Klumpp
DOI:10.1021/jo5007416
日期:2014.6.20
In this Note, we describe superacid-promoted cyclodehydrations leading to functionalized indenes. The product indenes are synthesized having N-heterocyclic substituents, including pyridyl, imidazolyl, pyrimdyl, and other groups. A mechanism is proposed involving dicationic, superelectrophilic intermediates. The protonated N-heterocyclic rings are shown to dramatically lower the LUMO energy level of
在本说明中,我们描述了导致功能化茚的超强酸促进的环脱水作用。合成具有N-杂环取代基的产物茚基,所述取代基包括吡啶基,咪唑基,嘧啶基和其他基团。提出了涉及双电超亲电中间体的机理。质子化的N杂环显示出显着降低了亲电子碳的LUMO能级(与类似的不带电系统相比)。