Tetrahedron Letters p. 6573 - 6576 (1990)
Update date:2022-07-29
Topics:
Grigg
Loginathan
Sukirthalingam
Sridharan
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.
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