Sakaki, Junichi; Schweizer, W. Bernd; Seebach, Dieter published the article 《Catalytic enantioselective hydrosilylation of aromatic ketones using rhodium complexes of TADDOL-derived cyclic phosphonites and phosphites》. Keywords: dioxolanedimethanol chiral cyclic phosphonite phosphite; hydrosilylation catalyst stereoselective rhodium phosphonite dioxolanedimethanol; crystal structure dioxolanedimethanol cyclic phenylphosphonite; mol structure dioxolanedimethanol cyclic phenylphosphonite.They researched the compound: (3aR,8aR)-2,2-Dimethyl-4,4,6,8,8-pentaphenyltetrahydro-[1,3]dioxolo[4,5-e][1,3,2]dioxaphosphepine( cas:147700-62-7 ).Reference of (3aR,8aR)-2,2-Dimethyl-4,4,6,8,8-pentaphenyltetrahydro-[1,3]dioxolo[4,5-e][1,3,2]dioxaphosphepine. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:147700-62-7) here.
Cyclic phosphonites and phosphites [shown as I; R = Ph, R’ = Me, Ph, 4-tolyl, 2,4,6-Me3C6H2, 2-naphthyl (2); R = 2-naphthyl, R’ = Ph, 4-tolyl, 2,4,6-Me3C6H2, 2-naphthyl (3); R = Ph, R’ = OMe, OPh (4)] are readily available from Cl2PR’ and (R,R)- or (S,S)-α,α,α’,α’-tetraaryl-1,3-dioxolane-4,5-dimethanols (TADDOLs 1, which, in turn, are only two steps away from tartrate); the x-ray crystal structure of one representative, the Ph phosphonite 2b, was determined Five previously described and six new chiral I were tested as ligands for RhI- and Pd0-catalyzed reactions such as hydrocarbonylations, hydroborations, and hydrosilylations of C:C bonds; while the resulting catalysts were highly active and regioselective, they did not lead to useful enantiomer enrichment of the products. In contrast, hydrosilylation of Ph and 2-naphthyl Me or Et ketone by Ph2SiCl2 (1.2 equiv) gave, after desilylation, the corresponding secondary alcs. of (R)-configuration with up to 87% ee in the presence of 0.1 equiv of the penta(2-naphthyl)-substituted phosphonite 3d and 0.02 mol-equiv of Rh.
Compounds in my other articles are similar to this one((3aR,8aR)-2,2-Dimethyl-4,4,6,8,8-pentaphenyltetrahydro-[1,3]dioxolo[4,5-e][1,3,2]dioxaphosphepine)Reference of (3aR,8aR)-2,2-Dimethyl-4,4,6,8,8-pentaphenyltetrahydro-[1,3]dioxolo[4,5-e][1,3,2]dioxaphosphepine, you can compare them to see their pros and cons in some ways,such as convenient, effective and so on.
Reference:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem