Franchino, Allegra; Marti, Alex; Nejrotti, Stefano; Echavarren, Antonio M. published the artcile< Silver-Free Au(I) Catalysis Enabled by Bifunctional Urea- and Squaramide-Phosphine Ligands via H-Bonding>, SDS of cas: 112-63-0, the main research area is gold phosphine thiourea urea squaramide substituted complex preparation; crystal mol structure gold phosphine thiourea urea squaramide complex; cyclization cycloisomerization catalyst gold phosphine thiourea urea squaramide complex; kinetics cyclization cycloisomerization gold phosphine thiourea urea squaramide catalyst; chloride abstraction; gold; hydrogen bond; kinetics; phosphine ligands.
A library of gold(I) chloride complexes I and II [R = H, CF3; Ar = Ph, 3,5-(CF3)2C6H3; X = CH2, (CH2)2, (CH2)3; Y = O, S] with phosphine ligands incorporating pendant (thio)urea and squaramide H-bond donors was prepared with the aim of promoting chloride abstraction from Au(I) via H-bonding. In the absence of silver additives, complexes bearing squaramides and trifluoromethylated aromatic ureas displayed good catalytic activity in the cyclization of N-propargyl benzamides, as well as in a 1,6-enyne cycloisomerization, a tandem cyclization-indole addition reaction and the hydrohydrazination of phenylacetylene. Kinetic studies and DFT calculations indicate that the energetic span of the reaction is accounted by both the chloride abstraction step, facilitated by the bidentate H-bond donor via an associative mechanism, and the subsequent cyclization step.
Chemistry – A European Journal published new progress about Abstraction reaction. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, SDS of cas: 112-63-0.
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Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics