A bimetallic catalyst system is presented that enables the decarboxylative cross‐coupling of triflates with carboxylate salts at only 100 °C, which is 70 °C lower than with previous Cu/Pd‐based systems. The new protocol allows the coupling of a broad range of aryl triflates with various substituted 2‐nitrobenzoates in good to excellent yields. The key feature of the catalyst system is a bidentate P,N‐ligand designed to bridge the Pd and Cu centres and thereby facilitating the rate‐determining transmetalation step. Mass spectrometry (ESI‐MS) studies support the ability of the aminopyrimidinyl phosphine to simultaneously coordinate copper and palladium.
'i'he zinc salts of phosphoric acid are of interest in the study of dental ccments. The following is a part of a more extended investigation of the reactions and equilibria involved in the manufacture and use of such plastic compounds. The phosphates of zinc, particularly the acid salts, have been very little studied. Graham describes an acid salt, ZnHP04.H20. Keintz3 Cf. Iiarkins and King, H IS JOURNAL, 41, 971 (19x9).
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