An efficientone-potsynthesis of novel N-substituted 1,4-dihydropyridine derivatives via a three-componentreaction of primary amines, dialkylacetylenedicarboxylates, and methyl (arylmethylidene) pyruvates has been reported. The reaction is performed using ZnCl2 (40 mol %) in dichloroethane in good to high yields through a domino Michael/cyclization sequence. Notably, the ready availability of the
Oxidative free radical reactions of enamino esters
作者:Che-Ping Chuang、Yi-Lung Wu
DOI:10.1016/j.tet.2003.12.035
日期:2004.2
produced by the cerium(IV) ammoniumnitrate (CAN) oxidation of β-dicarbonyl compounds undergo efficient addition to the C–C double bond of enamino esters. This CAN mediated free radical reaction between enamino esters and β-dicarbonyl compounds provides a novel method for the synthesis of highly substituted pyrroles. The direct CAN oxidation of β-enaminocinnamates gave the dimerization products effectively
Catalyst‐Free Transfer Hydrogenation from Amine‐Borane Small Oligomers
作者:Louis Le Moigne、Tommaso Posenato、David Gajan、Jennifer Lesage de la Haye、Jean Raynaud、Emmanuel Lacôte
DOI:10.1002/chem.202300145
日期:2024.1.2
were prepared via capping agent-controlled AA/BB polycondensation. Solid-state NMR spectroscopy, Differential Scanning Calorimetry and reactivity in catalyst-free transfer hydrogenations – to aldehydes, imines, electron-pooralkenes and alkynes – were used to assess how the oligomers bridge the gap between molecular amine-boranes and poly(amine-borane)s.