Herein, we report the development of ruthenium-catalysed cross-couplingreaction of β-ketoamides as alkenyl electrophiles with organoboronates. This reaction presumably proceeds via the cleavage of the alkenyl C–N bond of the β-enaminoamide, which is generated in situ from the β-ketoamide and pyrrolidine, and is promoted by a nearby amide directing group and a ruthenium catalyst.
An efficient and rapid synthesis of β-carboxamide derivatives using 2,2-dimethyl-2H,4H-1,3-dioxin-4-ones by microwave irradiation
作者:Bruhaspathy Miriyala、John S. Williamson
DOI:10.1016/j.tetlet.2003.08.118
日期:2003.10
A general, efficient and rapidmethod for the synthesis of various β-carboxamide derivatives using microwaveirradiation is described. Excellent isolated yields were obtained in very short reaction times when conventional heating was replaced by microwaveirradiation.
[2+2] Photocycloadditions and Photorearrangements of 2-Alkenylcarboxamido-2-cycloalken-1-ones
作者:Catherine Meyer、Olivier Piva、Jean-Pierre Pete
DOI:10.1016/s0040-4020(00)00366-5
日期:2000.6
photolysis of 2-alkenylcarboxamido-2-cycloalken-1-ones led regio- and stereospecifically to a faster [2+2] intramolecular reaction and therefore to the corresponding cyclobutanes. However, photorearrangements involving three different intramolecular H-abstraction processes, compete with the observed cycloaddition. To explain the results, we propose that different deactivation pathways are available