Iron-Catalyzed Oxidation of Tertiary Amines: Synthesis of β-1,3-Dicarbonyl Aldehydes by Three-Component C–C Couplings
摘要:
beta-1,3-Dicarbonyl aldehydes were synthesized by iron-catalyzed oxidative reactions between 1,3-dicarbonyl compounds and two molecules of tertiary amines in the presence of tert-butyl hydroperoxide (TBHP). alpha,beta-Unsaturated aldehydes generated by tertiary amine oxidation In situ act as key intermediates under mild reaction conditions.
P-BEMP: A New Efficient and Commercially Available User-Friendly and Recyclable Heterogeneous Organocatalyst for the Michael Addition of 1,3-Dicarbonyl Compounds
Michaeladdition of 1,3-dicarbonyls with various Michael acceptors has been found to be catalyzed by commercially available, user-friendly and recyclable N-phenyl-tris(dimethylamino)iminophosphorane immobilized on polystyrene resin (P-BEMP). The reaction does not require anhydrous solvents or inert atmosphere and proceeds smoothly at room temperature leading to the corresponding adducts, which can
Michael addition of various β-ketoesters with several Michael acceptors in water containing 10 mol% of N-phenyltris(dimethylamino)iminophosphorane results in high yield conversion to the corresponding adducts.
Utilization of Nonionic Bases in Water as a Highly Efficient Organocatalytic System for Michael Addition of β‐Ketoesters
作者:David Bensa、Jean Rodriguez
DOI:10.1081/scc-120030703
日期:2004.12.31
Michael addition of various beta-ketoesters with several Michael acceptors in water containing 5 mol% of a nonionic base such as phosphazenes, guanidines, and more classical nitrogen containing derivatives or triphenyl phosphine results in high yield conversion to the corresponding adducts. The study also clearly establishes the benefical use of water as solvent compared to more conventional organic medium.
Bonadies, Francesco; Forcellese, Maria Luigia; Locati, Ludovica, Gazzetta Chimica Italiana, 1994, vol. 124, # 11, p. 467 - 468
作者:Bonadies, Francesco、Forcellese, Maria Luigia、Locati, Ludovica、Scettri, Arrigo、Scolamiero, Cristina
DOI:——
日期:——
Polycyclische aromatische Alkaloide, 2.Mitt. Synthese von Onychin und Eupolauridin
作者:Franz Bracher
DOI:10.1002/ardp.19893220511
日期:——
Es wird ein neuesVerfahrenzurHerstellung des Biaryls 4 beschrieben. Dadurch wird die Totalsynthese von Onychin (5) deutlich verbessert. Eupolauridin (7) wird aus 5 im Eintopfverfahren über das Enamin 6 hergestellt.