RhII-Catalyzed Reactions of Diazocarbonyl Compounds with Dicarboximides
作者:Vsevolod V. Nikolaev、Heinz Heimgartner、Anthony Linden、Ivan S. Krylov、Valerij A. Nikolaev
DOI:10.1002/ejoc.200600396
日期:2006.10
phthalimide and succinimide proceeds chemoselectively at the oxygen atom of the imidic carbonyl group, giving rise to the intermediate formation of carbonylylides. Intramolecular stabilization of these highly reactive species occurs in three different ways, and is controlled by the structure of the 2-oxocarbenoids. Carbonylylides from diazo esters mainly experience a [1,4]-hydrogen shift, and in this case
Stabilization of imidic carbonyl ylides derivedfrom α-diazocarbonyl compounds and succinimide occurs in two different ways: ylides from diazoesters experience a [1,4]-hydrogen shift to produce the corresponding O-alkylimidates while their analogues with at least one acyl group undergo [1,5]-electrocyclization yielding 1,3-dioxoles.