In situ formation and reaction of 2-pyridylboronic esters
AA Fuller, HR Hester, EV Salo, EP Stevens
Index: Fuller, Amelia A.; Hester, Heidi R.; Salo, Eric V.; Stevens, Erland P. Tetrahedron Letters, 2003 , vol. 44, # 14 p. 2935 - 2938
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Citation Number: 42
Abstract
2-Pyridylboronic esters were generated by cross-coupling 2-bromopyridines with bis (pinacolato) diboron in the presence of a base and palladium catalyst. The boronic esters reacted in situ with unreacted 2-bromopyridines to afford high yields of 2, 2′-bipyridines as homocoupled products. Depending upon the reaction conditions, varying amounts of protodeboronated products were also observed. An attempted cross-coupling between ...
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