Asymmetric synthesis of multi-substituted spiro[5,5]undecane-1,5,9-triones via organocatalytic three-component reaction
作者:Jian Shi、Yangbin Liu、Min Wang、Lili Lin、Xiaohua Liu、Xiaoming Feng
DOI:10.1016/j.tet.2011.01.037
日期:2011.3
The asymmetric domino three-component Knoevanagel-Diels–Alder addition (ATCDA) reaction, as an important methodology, has been utilized to construct complex product from ordinary starting materials. In this report, many typical organoamine catalysts were investigated to achieve highly efficient asymmetric three-component reaction of enones 2, aldehydes 3 and Meldrum’s acid 4. Various pharmacological
作为一种重要的方法,非对称多米诺三组分Knoevanagel-Diels-Alder加成反应(ATCDA)已被用于从普通起始原料构建复杂的产物。在本报告中,研究了许多典型的有机胺催化剂,以实现烯酮2,醛3和Meldrum酸4的高效不对称三组分反应。各种药理学上多取代的螺[5,5]十一烷-1,5,9-三酮一锅得到9 g的9-氨基-9-脱氧表位-奎宁促进,中等至良好的收率(高达81%),具有极好的非对映异构体(> 99:1 dr)和对映选择性(高达97 %ee)。同时,根据控制实验和分析数据,提出了该反应双重活性的合理机理。