The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 5-(di-tert-Butylphosphino)-1′,3′,5′-triphenyl-1’H-1,4′-bipyrazole( cas:894086-00-1 ) is researched.Application of 894086-00-1.Rotta-Loria, Nicolas L.; Chisholm, Alicia J.; MacQueen, Preston M.; McDonald, Robert; Ferguson, Michael J.; Stradiotto, Mark published the article 《Exploring the influence of phosphine ligation on the gold-catalyzed hydrohydrazination of terminal alkynes at room temperature》 about this compound( cas:894086-00-1 ) in Organometallics. Keywords: phosphine gold complex preparation catalyst hydrohydrazination terminal alkyne; arylketone hydrazone preparation hydrohydrazination terminal alkyne gold catalyst. Let’s learn more about this compound (cas:894086-00-1).
The synthesis and/or NMR/X-ray characterization of a new series of (L)AuCl complexes is reported, featuring BippyPhos, AdJohnPhos, silyl ether based ligands including OTIPS-DalPhos, and PAd-DalPhos. These complexes, along with previously reported analogs featuring cataCXium-A, tBuJohnPhos, and Mor-DalPhos, were screened as precatalysts in the hydrohydrazination of terminal aryl alkynes with hydrazine hydrate, yielding arylketone hydrazones, using LiB(C6F5)4·2.5Et2O as an activator and running under unprecedentedly mild conditions (25°, 1 mol% Au). The precatalyst (cataCXium-A)AuCl proved to be particularly effective in such transformations, demonstrating useful scope.
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