Annulative π-Extension (APEX) of Indoles to Pyrido[1,2-<i>a</i>]indoles Using 4-Oxo Peroxides as C4 Units
作者:Xin Wang、Chenhao Lou、Leiyang Lv、Zhiping Li
DOI:10.1021/acs.orglett.1c02062
日期:2021.8.6
3-substituted indoles to pyrido[1,2-a]indoles is developed by using 4-oxo peroxides as π-extending reagents, which are employed as versatile C4 building blocks. This transformation is initiated by Brønsted acid-mediated Hock rearrangement of the peroxyl group. Notably, the pyrido[1,2-a]indole products are obtained by elimination of the indole moiety from the corresponding dihydropyrido[1,2-a]indoles, which
Benzannulation of Indoles to Carbazoles and Its Applications for Syntheses of Carbazole Alkaloids
作者:Xiaojian Zheng、Leiyang Lv、Shenglin Lu、Wenxiao Wang、Zhiping Li
DOI:10.1021/ol5025053
日期:2014.10.3
A novel and efficient method for the benzannulation of indoles to carbzaoles is reported gamma-Carbonyl tert butylperoxide is applied as a new diene building block for the pi-extension of simple indoles. The synthetic utility of this method is demonstrated by concise and selective total syntheses of naturally occurring carbazole alkaloids, olivacine, and asteropusazole A.
The Rearrangement of <i>tert</i>-Butylperoxides for the Construction of Polysubstituted Furans
作者:Xiaojian Zheng、Shenglin Lu、Zhiping Li
DOI:10.1021/ol402509u
日期:2013.11
The Brønsted acid catalyzed rearrangement of tert-butyl peroxides provides a new strategy to construct 2,3-disubstituted furans via 1,2-aryl migration. In addition, tert-butyl peroxides could also be transformed into 2,3,5-trisubstituted or 2,5-disubstitutedfuransthrough a sequence of base-catalyzed Kornblum–DelaMare rearrangements and acid-promoted Paal–Knorr reactions.