1160309-57-8Relevant articles and documents
Heck cross-coupling reactions in ionic liquid mediated pd nanocatalysts
Gautam, Prashant,Srivastava, Vivek
, p. 359 - 372 (2021/09/07)
We straightforwardly synthesized 18 different types of palladium nanoparticles by using a series of palladium metal precursors and ionic liquids. All the materials went for XRD, TEM, and ICP-OES analysis, before going to Heck cross-coupling reaction as a catalyst. We evaluated the catalytic performance of our developed IL#Pd MNP catalyst over Heck cross-coupling reaction between different terminal olefins with various 3-iodo-benzopyrones, including sterically hindered, electron-rich, electron neutral and electron-deficient systems. We obtained the Heck cross-coupling reaction product in good to average yield under phosphine free reaction condition with an added advantage of 6 times catalyst recycling.
Syntheses of (E)- and (Z)-3-styrylchromones
Silva, Vera L. M.,Silva, Artur M. S.,Pinto, Diana C. G. A.,Cavaleiro, Jose A. S.,Vasas, Attila,Patonay, Tamas
experimental part, p. 1307 - 1315 (2009/12/05)
Several (E)- and (Z)-3-styrylchromones were prepared by two different methodologies, the Wittig reaction of chromone-3-carboxaldehyde with benzylic ylides and the Knoevenagel condensation of chromone-3-carboxaldehyde with phenylacetic acids in the presence of potassium tert-butoxide under microwave irradiation. The Knoevenagel reaction followed by a decarboxylation offered an efficient and diastereoselective method for preparing (E)-3-styrylchromones in a shorter reaction time. It was also demonstrated that phenylacetic acid can also be substituted with success by phenylmalonic acid. The stereochemistry of all products was assigned by NMR experiments.