The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Potassiumtris(1-pyrazolyl)borohydride( cas:18583-60-3 ) is researched.SDS of cas: 18583-60-3.Gemel, Christian; Trimmel, Gregor; Slugovc, Christian; Kremel, Sabine; Mereiter, Kurt; Schmid, Roland; Kirchner, Karl published the article 《Ruthenium Tris(pyrazolyl)borate Complexes. 1. Synthesis and Reactivity of Ru(HB(pz)3)(COD)X (X = Cl, Br) and Ru(HB(pz)3)(L2)Cl (L = Nitrogen and Phosphorus Donor Ligands)》 about this compound( cas:18583-60-3 ) in Organometallics. Keywords: ruthenium pyrazolylborate complex preparation crystal structure; nitrogen phosphorus donor ruthenium pyrazolylborate complex; crystal structure ruthenium pyrazolylborate donor complex; mol structure ruthenium pyrazolylborate donor complex; coupling reaction catalyst ruthenium pyrazolylborate complex; phenylacetylene coupling benzoic acid allyl alc. Let’s learn more about this compound (cas:18583-60-3).
The synthesis and catalytic reactivity of a variety of new ruthenium complexes of the tris(pyrazolyl)borate ligand (HB(pz)3) are reported in this paper. From the parent complex Ru(HB(pz)3)(COD)X (X = Cl, Br) the cationic derivatives [Ru(HB(pz)3)(COD)L]+ (L = H2O, CH3CN, pyridine, dmso) have been obtained by treatment with 1 equiv of AgCF3SO3 in CH2Cl2 solutions of L. Displacement of COD from these latter complexes has been accomplished in boiling dmf solutions of ligands L2 = Ph2PCH2PPh2 (dppm), Ph2PCH2CH2NMe2 (pn), and Me2NCH2CH2NMe2 (tmeda) as well as L = pyridine and 3-methylpyridine to give Ru(HB(pz)3)(L2)Cl and Ru(HB(pz)3)(L)2Cl, resp., each in high yield. From some of these complexes, in turn, the chloride ion has been abstracted with either AgCF3SO3, TlCF3SO3, or NaBPh4 in CH3CN as the solvent. In this way [Ru(HB(pz)3)(dppm)(CH3CN)]CF3SO3, [Ru(HB(pz)3)(pn)(CH3CN)]BPh4, and [Ru(HB(pz)3)(tmeda)(CH3CN)]BPh4 were prepared Selected x-ray structures are included. Some of the complexes synthesized are efficient catalysts for the formation of selectively C-O-coupled products from the reaction of phenylacetylene with either benzoic acid or allyl alcs.
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