Abstract
AbstractOxime palladacycles‐ di‐μ‐chlorobis [5‐chloro‐2‐[(4‐ chlorophenyl)(hydroxyimino‐κN) methyl] phenyl‐κC] palladium (II) dimer (1) and di‐μ‐chlorobis [5‐hydroxy‐2‐[1‐(hydroxyimino‐κN) ethyl] phenyl‐κC] palladium (II) dimer (2) provide a phosphine free approach for the synthesis of ynones at low palladium loadings (10−5 mol%) thus resulting in catalytic turnover numbers (TONs) and turnover frequencies (TOFs) of the order of 106. Oxime palladacycle 1 shows TON 587 times and TOF 331 times higher than the best palladium catalyst reported in the literature for the carbonylative cross‐coupling between 4‐iodoanisole and phenylacetylene as a model reaction. The use of poly (ethylene glycol) as an environmentally benign solvent system allows the recyclability of the oxime palladacycle at low palladium loading up to four times. Further, the oxime palladacycles are advantageous in effecting higher conversion and selectivity at low palladium loadings as compared to conventional palladium precursors‐ Pd (OAc)2 and PdCl2(PPh3)2
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
