3-Alkenyl-2-silyloxyindoles: An Enabling, Yet Understated Progeny of Vinylogous Carbon Nucleophiles
作者:Gloria Rassu、Vincenzo Zambrano、Rossella Tanca、Andrea Sartori、Lucia Battistini、Franca Zanardi、Claudio Curti、Giovanni Casiraghi
DOI:10.1002/ejoc.201101446
日期:2012.1
We introduce novel 3-alkenyl-2-silyloxyindole nucleophiles and demonstrate their utility by developing an unprecedented vinylogous Mukaiyama-type aldol reaction with aromatic aldehydes. This reaction displays excellent levels of γ- site selectivity and diastereoselectivity and delivers valuable hydroxylated oxindoles bearing a substituted exocyclic double bond at the C-3 position. A preliminary trial
我们介绍了新型 3-alkenyl-2-silyloxyindole 亲核试剂,并通过开发前所未有的与芳香醛的乙烯基 Mukaiyama 型羟醛反应来证明它们的效用。该反应显示了出色的 γ 位点选择性和非对映选择性,并提供了在 C-3 位带有取代的环外双键的有价值的羟基化羟吲哚。进行了不对称催化版本的初步试验,它显示出对所需的乙烯醇醛产品有希望的对映选择性。