Preparation of Optically Enriched Secondary Alkyllithium and Alkylcopper Reagents—Synthesis of (−)‐Lardolure and Siphonarienal
作者:Varvara Morozova、Juri Skotnitzki、Kohei Moriya、Konstantin Karaghiosoff、Paul Knochel
DOI:10.1002/anie.201800792
日期:2018.5.4
converted into secondary alkyllithium and secondary alkylcopper compounds with very high retention of configuration. Quenching with various electrophiles, including chiral epoxides, provided a range of chiral molecules with high enantiomeric purity (>90 % ee). This method has been applied in an iterative fashion in the total synthesis of (−)‐lardolure in 13 steps and 5.4 % overall yield (>99 % ee, dr>99:1)
将光学富集的仲烷基碘化物转化为仲烷基锂和仲烷基铜化合物,并保持很高的构型。用包括手性环氧化物在内的各种亲电试剂进行猝灭,提供了一系列具有高对映体纯度(> 90%ee)的手性分子 。该方法已以迭代方式应用在(-)-lardolure的总合成中,共13步,总收率5.4%(> 99% ee,dr> 99:1)和siphonarienal在15步中,总收率5.6%( > 99% ee,dr> 99:1)从市售的(R)-3-羟基丁酸乙酯(> 99% ee)开始。