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190502203(金币+2,VIP+0):谢谢啊,美女.要是帮我弄到全文更好了,感激不尽 10-10 16:11
Syntheses employing pyridyllithium reagents: new routes to 2,6-disubstituted pyridines and 6,6′-disubstituted 2,2′-bipyridyls
Journal of Organometallic Chemistry
Volume 56, 1 August 1973, Pages 53-66
J.E. Parks, B.E. Wagner, R.H. Holm
Abstract
New 2,6-disubstituted pyridine derivatives have been synthesized employing 6-bromo-2-lithiopyridine as an intermediate. Subsequent replacement of the 6-bromine can be effected by metal-halogen exchange or other reactions in some cases. Reactions of the previously unreported 6-lithio-2,2′-bipyridyl and 6,6′-dilithio-2,2′-bipyridyl are described. Cupric chloride was found to be an effective coupling agents for lithiopyridine reagents, allowing facile and high yield syntheses of substituted 2,2′-bipyridyls.
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