Highly Stereoselective Synthesis of 1,2-Disubstituted Indanes by Pd-Catalyzed Heck/Suzuki Sequence of Diarylmethyl Carbonates
作者:Akihiro Matsude、Koji Hirano、Masahiro Miura
DOI:10.1021/acs.orglett.0c00945
日期:2020.4.17
diastereoselectivity (trans/cis > 20:1). The key to achieve the high chemoselectivity and stereoselectivity is the use of the tris[3,5-di(tert-butyl)-4-methoxyphenyl]phosphine (DTBMP) ligand of remote steric hindrance. Moreover, the asymmetric synthesis is possible by the enantiospecific, stereoinvertive reaction of the optically active starting substrates to form the chiral indanes with high stereochemical
已经开发了钯催化的碳酸二芳基甲基酯与芳基硼酸衍生物的咪唑罗基–赫克型环化/铃木–宫浦交叉偶联级联反应,以高收率和高非对映选择性(高反式/顺式> 20)提供相应的1,2-二取代的茚满:1)。实现高化学选择性和立体选择性的关键是使用位阻较远的三[3,5-二(叔丁基)-4-甲氧基苯基]膦(DTBMP)配体。此外,通过旋光起始底物的对映体特异性,立体反转反应形成具有高立体化学保真度(> 98%es)的手性茚满,不对称合成是可能的。