Use of 1,1'-Binaphthalene-8,8'-diol as a Chiral Auxiliary for Asymmetric Michael Addition. Application to the Syntheses of Turmeronol A and B.
作者:Kiyoshi TANAKA、Mohammad NURUZZAMAN、Masato YOSHIDA、Naoyuki ASAKAWA、Xiao-Shen YANG、Kazunori TSUBAKI、Kaoru FUJI
DOI:10.1248/cpb.47.1053
日期:——
Highly diastereoselective Michael addition of lithium diorganocuprates to the half-ester of 1, 1'-binaphthalene-8, 8'-diol gave β-substituted esters with high enantiomeric excess after methanolysis. The optically active phenolic sesquiterpenes turmeronol A (1) and B(2) have been synthesized using this reaction as a key step.
二愈创木酸锂与 1,1'-联萘-8,8'-二醇的半酯进行高非对映选择性迈克尔加成反应,甲醇分解后得到对映体过量的 β-取代酯。以该反应为关键步骤,合成了具有光学活性的酚类倍半萜化合物松柏醇 A (1) 和 B(2)。