Asymmetric Dehydrative Cyclization of ω-Hydroxy Allyl Alcohols Catalyzed by Ruthenium Complexes
作者:Shinji Tanaka、Tomoaki Seki、Masato Kitamura
DOI:10.1002/anie.200904671
日期:2009.11.9
New axially chiral ligands and their allyl esters have been designed and synthesized. The combination of these ligands with [CpRu(CH3CN)3]PF6 has realized highly efficient intramolecular dehydrative cylization of ω‐hydroxy allyl alcohols, to give α‐alkenyl‐substituted cyclic ethers with up to greater than 99:1 enantiomeric ratio without activation of the allylic moieties (see scheme; Cp=cyclopentadienyl
已经设计并合成了新的轴向手性配体及其烯丙基酯。这些配体与[CpRu(CH 3 CN)3 ] PF 6的结合实现了ω-羟基烯丙醇的高效分子内脱水环化反应,得到对映体比高达99:1的α-烯基取代的环状醚没有活化烯丙基部分(参见方案; Cp =环戊二烯基,naph =萘基,py =吡啶)。