Palladium/imidazolium salt catalyzed coupling of aryl halides with hypervalent organostannates

[GRAPHICS] A Pd(OAc)(2)/imidazolium chloride system has been used to mediate the catalytic cross coupling of aryl halides with organostannanes. The imidazolium salt IPr . HCl (IPr = 1,3-bis(2,6-diisopropylphenyl) imidazol-2-ylidene) in combination with TRAP ((BU4NF)-B-n) was found to be most effective for the cross-coupling of aryl bromides and electron-deficient aryl chlorides with aryl and vinyl stannanes.