Palladium(II) Pincer Type Complexes Containing ONO Donor Heterocyclic Hydrazones: Synthesis, Structure and Catalytic Activity Towards the Suzuki–Miyaura Cross-Coupling of 3-Bromochromone and Arylboronic Acids via C–Br Activation.

Autor:	Shalini, C., Dharmaraj, N., Bhuvanesh, Nattamai S. P., Kaveri, M. V.
Předmět:	CATALYTIC activity PALLADIUM compounds PALLADIUM HYDRAZONES X-ray diffraction HOMOGENEOUS catalysis
Zdroj:	Catalysis Letters; Jan2024, Vol. 154 Issue 1, p132-143, 12p
Abstrakt:	Three new pincer type palladium(II) complexes 1–3 synthesized by reacting palladium precursor [PdCl2(PPh3)2] with ONO heterocyclic hydrazone ligands H2L1-3 in equimolar quantities were well characterized using single-crystal XRD, analytical and spectroscopic data. These complexes were examined as homogeneous catalysts for the Suzuki–Miyaura cross-coupling of 3-bromochromone with a range of arylboronic acids in ethanol medium. Catalytic transformations progressed smoothly under aerobic conditions with 0.01 mol% of catalyst load at room temperature to afford an array of 3-arylated chromones (6a–o). This catalyst was reused up to five cycles and favourably this protocol does not require any external oxidant, additives and phase transfer reagents. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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