Domino “Staudinger/Semi-Aza-Wittig/Fragmentation” Reactions of γ-Azido-β-hydroxyketones
摘要:
Treatment of gamma-azido-beta-hydroxyketones with triphenylphosphine resulted, depending on the structural features of the starting materials, in a domino "Staudinger/semi-aza-Wittig/fragmentation" reaction rather than a normal aza-Wittig reaction. 2-Azido-1-hydroxy-1-(2,4-dioxoalkyl)cyclopentanes, readily available by condensation of 1,3-dicarbonyl dianions with 2-azidocyclopentanone, proved to be optimal starting materials for these reactions which afforded 1-(1,3-dioxoalkyl)amino-2-(alkylidene)cyclopentanes.
Domino ‘Staudinger–aza-Wittig–1,5-phosphonium-rearrangement–fragmentation’ reactions of 1-azido-2-hydroxy-4,6-dioxohexanes
作者:Peter Langer、Ilia Freifeld、Heydar Shojaei
DOI:10.1039/b310701a
日期:——
The domino âStaudingerâaza-Wittigâ1,5-phosphonium-rearrangementâfragmentationâ reaction of 1-azido-2-hydroxy-4,6-dioxohexanes allows a convenient synthesis of functionalized 1-acetamido-2-alkylidenecyclopentanes.