Catalytic asymmetric synthesis of chromenes and tetrahydroquinolines via sequential allylic alkylation and intramolecular Heck coupling
作者:Valentín Hornillos、Anthoni W. van Zijl、Ben L. Feringa
DOI:10.1039/c2cc30395g
日期:——
Highly enantioselective synthesis of chiral chromenes and tetrahydroquinolines is achieved by combining asymmetric copper-catalyzed allylic substitution with Grignard reagents and an efficient intramolecular Heck reaction. Moreover, the exocyclic double bond formed in the cyclisation was subjected to RCM, hydroboration and hydrogenation illuminating the synthetic versatility of these heterocycles.
通过将不对称铜催化的烯丙基取代与格利雅试剂结合以及有效的分子内Heck反应,可以实现手性二烯酮和四氢喹啉的高度对映选择性合成。此外,对环化反应中形成的环外双键进行了RCM,氢硼化和氢化反应,阐明了这些杂环的合成多功能性。