The effect of thallium(I) salts on palladium catalysed tandem cyclisation-anion capture processes

Article abstract of DOI:10.1016/S0040-4039(00)97120-X

The effect of the addition of 1 mol. of various additives [NEt₄Cl, Ag(I) and Tl(I) salts] on selectively suppressing direct capture processes has been studied for hydride ion transfer (from formate) and phenyl transfer (from PhZnCl). The additives can promote cyclisation-anion capture at the expense of direct capture with Tl(I) salts being especially useful although in one case NEt₄Cl promotes direct capture. The addition of Tl(I) formate diverts the cyclisation-hydride ion capture process into a new reaction channel in one case.