Total synthesis of (−)-20-epiuleinevia stereocontrolled one-pot asymmetric azaelectrocyclization followed by novel 1,4-addition reaction
作者:Taku Sakaguchi、Shohei Kobayashi、Shigeo Katsumura
DOI:10.1039/c0ob00627k
日期:——
containing the 2,3,4-trisubstituted piperidine core, was achieved using a stereocontrolled one-pot asymmetric 6π-azaelectrocyclization followed by a stereoselective 1,4-addition reaction of the unsaturated ester with a Grignard reagent resulting from the novel neighboring participation of the hydroxyl group in cis-aminoindanol as a chiral nitrogen source.
包含2,3,4-三取代哌啶核心的吲哚生物碱(-)-20-表青碱的首次不对称全合成是通过立体控制的一锅式不对称6π-氮杂电环化反应,然后进行立体选择性的1,4-不饱和酯与格氏试剂的加成反应,是由于羟基中新的邻位参与 顺式氨基吲哚醇 作为手性氮源