Synthesis of a Chiral Bis(bipyridine) Ligand of the Chiragen Family for the Self-Assembly of Enantiomerically Pure Helicates
作者:Paul Baret、Jacques Einhorn、Gisèle Gellon、Jean-Louis Pierre
DOI:10.1055/s-1998-2046
日期:1998.4
The chiral bis(bipyridine) ligand L *, belonging to the "chiragen" family, has been synthesized. The synthetic pathway involves an original preparation of acylnicotinates which is of synthetic value. The synthetic strategy described here may allow the access to various bisbidentate ligands, well-suited to the self-assembly of enantiomerically pure helicates.
Palladium-Catalyzed Divergent Arylation with Triazolopyridines: One-Pot Synthesis of 6-Aryl-2-α-styrylpyridines
作者:Youngtaek Moon、Soonhyung Kwon、Dahye Kang、Honggu Im、Sungwoo Hong
DOI:10.1002/adsc.201500967
日期:2016.3.17
We have developed a new strategy for palladium‐catalyzed arylation reactions with triazolopyridines, wherein two different chemical transformations (C‐3 vs. C‐7) are observed by differentiating the substrates using different bases. The reactive palladium carbenoids were directly generated from triazolopyridines and underwent denitrogenative arylations with aryl bromides. Intriguingly, when potassium