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A New Synthetic Route to Enantiomerically Pure Axially Chiral 2,2′-Bipyridine N,N′-Dioxides. Highly Efficient Catalysts for Asymmetric Allylation of Aldehydes with Allyl(trichloro)silanes.

✍ Scribed by Toyoshi Shimada; Asato Kina; Tamio Hayashi

Publisher: John Wiley and Sons
Year: 2003
Weight: 130 KB
Volume: 34
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.200349031

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## Abstract Palladium‐catalyzed cross‐coupling of bipyridine __N,N′__‐dioxide 6,6′‐dichloride (__R__~__nap__~__,R__~__pyr__~)‐**1** with the aryl Grignard reagents opened a new approach to axially chiral bipyridine __N,N′‐__dioxides (__R__)‐**2** bearing a variety of aryl groups at the 6 and 6′ pos