We report the synthesis of cobalt complexes of novel iminopyridine-oxazoline (IPO) ligands and their application to the asymmetric hydroboration of 1,1-disubstituted aryl alkenes. The new catalysts afforded α-alkyl-β-pinacolatoboranes with exclusive regioselectivity in high yields with up to 99.5% ee. Furthermore, we have applied this method to an efficient synthesis of naproxen.
我们报告了新型亚
氨基吡啶-
恶唑啉 (IPO)
配体的
钴配合物的合成及其在 1,1-二取代芳基烯烃的不对称
硼氢化中的应用。新催化剂以高产率提供了具有独特区域选择性的 α-烷基-β-
频哪醇硼烷,ee 高达 99.5%。此外,我们已将此方法应用于
萘普生的有效合成。