Aqueous and Solvent-Free Uncatalyzed Three-Component Vinylogous Mukaiyama-Mannich Reactions of Pyrrole-Based Silyl Dienolates
作者:Andrea Sartori、Luca Dell'Amico、Claudio Curti、Lucia Battistini、Giorgio Pelosi、Gloria Rassu、Giovanni Casiraghi、Franca Zanardi
DOI:10.1002/adsc.201100572
日期:2011.12
A catalyst-free, environmentally benign three-component vinylogous Mukaiyama–Mannich reaction of pyrrole-based silyl dienolates is presented, which works effectively in both aqueous and solvent-free environments. Both lipophilic and hydrophilic aldehyde candidates are suitable substrates, allowing access to a rich repertoire of unsaturated vicinal aminolactam structures with virtually complete γ-site
提出了一种无催化剂,对环境无害的三组分乙烯基吡咯基甲硅烷基二烯酸酯的Mukaiyama-Mannich反应,该反应在水性和无溶剂环境中均有效。亲脂性和亲水性醛候选人是合适的基材,使几乎完全γ-部位选择性访问不饱和邻氨基内酰胺结构的丰富剧目,并以较好的抗-diastereoselectivity。该技术的实用性通过保护密集的羟基化糖相关内酰胺框架的无基团合成而得到强调。证明了水作为必不可少的氢键反应推进剂的作用。