Tetrahedron letters

Unusual formation of 5-halo-2, 2′-bipyridyls by treatment of tris (2-pyridyl) phosphine derivatives with halogens

Y Uchida, R Kajita, Y Kawasaki, S Oae

Index: Uchida; Kajita; Kawasaki; Oae Tetrahedron Letters, 1995 , vol. 36, # 23 p. 4077 - 4080

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Citation Number: 13

Abstract

Reaction of tris (2-pyridyl) phosphine with chlorine in dichloromethane or acetonitrile gave chlorotris (2-pyridyl) phosphonium chloride which afforded a coupling product, 2, 2′- bipyridyl, by treating with dilute HCl. Treatment of tris (2-pyridyl) phosphine or tris (2-pyridyl)