Enantioselective cooperative triple catalysis: unique roles of Au(I)/amine/chiral Bronsted acid catalysts in the addition/cycloisomerization/transfer hydrogenation cascade was written by Patil, Nitin T.;Raut, Vivek S.;Tella, Ramesh Babu. And the article was included in Chemical Communications (Cambridge, United Kingdom) in 2013.SDS of cas: 1043567-32-3 This article mentions the following:
An enantioselective cooperative process involving the concerted/simultaneous action of three different catalysts i.e. Au(i)/amine/chiral Bronsted acid catalysts has been realized for the synthesis of 2-substituted tetrahydroquinolines from 2-aminobenzaldehydes and terminal alkynes. In the experiment, the researchers used many compounds, for example, (11bS)-4-Hydroxy-2,6-di(phenanthren-9-yl)dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepine 4-oxide (cas: 1043567-32-3SDS of cas: 1043567-32-3).
(11bS)-4-Hydroxy-2,6-di(phenanthren-9-yl)dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepine 4-oxide (cas: 1043567-32-3) belongs to chiral phosphine ligands. Phosphine-catalyzed asymmetric reactions are now powerful and versatile tools for the construction of C–C, C–N, C–O, and C–S bonds and for the syntheses of functionalized carbocycles and heterocycles. Trivalent phosphorus compounds called phosphines have a tetrahedral electron-group geometry which makes them structurally analogous to amines.SDS of cas: 1043567-32-3
Referemce:
Phosphine ligand,
Chiral phosphines in nucleophilic organocatalysis