Catalytically Asymmetric Pd/Norbornene Catalysis: Enantioselective Synthesis of (+)-Rhazinal, (+)-Rhazinilam, and (+)-Kopsiyunnanine C1–3
摘要:
A catalytically asymmetric palladium/norbornene-catalyzed reaction is reported, where alpha-aryl tetrahydroquinoline derived phosphoramidite L15 is found to be the optimum ligand. Taking advantage of this transformation, the concise and unified enantioselective syntheses of (+)-rhazinal, (+)-rhazinilam, and (+)-kopsiyunnanine C1, C2, and C3 are realized.
A catalytically asymmetric palladium/norbornene-catalyzed reaction is reported, where alpha-aryl tetrahydroquinoline derived phosphoramidite L15 is found to be the optimum ligand. Taking advantage of this transformation, the concise and unified enantioselective syntheses of (+)-rhazinal, (+)-rhazinilam, and (+)-kopsiyunnanine C1, C2, and C3 are realized.
Pd-Catalyzed Chemoselective Catellani <i>Ortho</i>-Arylation of Iodopyrroles: Rapid Total Synthesis of Rhazinal
The rare chemoselectivity between two different aryl halides was realized by optimizing the kinetics of the different steps of this multicomponent process. The new developed method led to the rapidsynthesis of rhazinal in a highly efficient manner.