Catalytic, Asymmetric Hypervinylogous Mukaiyama Aldol Reactions of Extended Furan-Based Silyl Enolates
作者:Claudio Curti、Lucia Battistini、Andrea Sartori、Alessio Lodola、Marco Mor、Gloria Rassu、Giorgio Pelosi、Franca Zanardi、Giovanni Casiraghi
DOI:10.1021/ol2020626
日期:2011.9.2
Virtually perfect transmittal of the enolate reactivity up to five conjugated double bonds from the origin allows a series of furan-based silyloxypolyenes to add to aldehyde carbonyls at the most distant point of the molecule. Denmark’s axially chiral bisphosphoramide/SiCl4 combination catalyzes these scantly precedented, long-range Mukaiyama-type vinylogous aldol reactions efficiently, providing a palette
从起始点到实际上多达五个共轭双键的烯醇盐反应性几乎完美地传递,使得一系列基于呋喃的甲硅烷氧基多烯可以在分子最远的位置加成醛羰基。丹麦的轴向手性双磷酰胺/ SiCl 4组合有效地催化了这些先例性的,远距离的开海山型乙烯基醇醛醇醛反应,提供了扩展的γ-亚烷基丁烯醇内酯甲醇调色板,具有完整的ω-位选择性和良好的对映选择性。