Dearomatization of 3‐Nitroindoles with Highly γ‐Functionalized Allenoates in Formal (3+2) Cycloadditions
作者:Léo Birbaum、Laurent Gillard、Hélène Gérard、Hassan Oulyadi、Guillaume Vincent、Xavier Moreau、Michael De Paolis、Isabelle Chataigner
DOI:10.1002/chem.201903455
日期:2019.10.28
3-Nitroindoles are easily reacted with highly substituted γ-allenoates in the presence of a commercially available phosphine catalyst. For instance, allenoates derived from biomolecules such as amino and deoxycholic acids are combined for the first time with 3-nitroindole. The corresponding dearomatized (3+2) tricyclic cycloadducts are obtained as α-regioisomers exclusively. DFT computations shed light
Allenoates prove competence in the synthesis of itaconic acidderivatives and tri-carboxylated compounds via site-selective electrochemical fixation of one or two molecules of CO2 (yields up to 87 %). Complete chemodivergency is realized via dedicated electrolytic conditions optimization.
联烯酸酯通过一或两个 CO 2分子的位点选择性电化学固定(产率高达 87%)证明了其合成衣康酸衍生物和三羧化化合物的能力。通过专门的电解条件优化实现了完全的化学分歧。