Syntheses of a Flobufen Metabolite and Dapoxetine Based on Enantioselective Allylation of Aromatic Aldehydes
作者:Filip Hessler、Aleš Korotvička、David Nečas、Irena Valterová、Martin Kotora
DOI:10.1002/ejoc.201301899
日期:2014.4
The enantioselective allylation of an aromatic aldehyde to give a chiral homoallylic alcohol was employed as the key step in the syntheses of a flobufen metabolite and dapoxetine. In the former case, the homoallylic alcohol moiety (99 % ee) was converted into a five-membered lactone ring with good preservation of the optical purity, and the target compound, a flobufen metabolite, was obtained in 95 % ee
芳醛对映选择性烯丙基化得到手性高烯丙醇被用作氟布芬代谢物和达泊西汀合成的关键步骤。在前一种情况下,高烯丙醇部分 (99% ee) 转化为五元内酯环,光学纯度保持良好,目标化合物氟布芬代谢物以 95% ee 获得。在后一种情况下,高烯丙醇部分 (97% ee) 经过几个步骤转化为 3-氨基丙醇部分。在合成过程中,观察到光学纯度逐渐降低,目标化合物达泊西汀以 85% ee 获得。