Biphenyl triarylphosphines

In continuation of the work on biphenyl tetraphosp tunes (see below), in 2014 Lv and Zhang and Zhang [61] reported the synthesis of biphenyl triarylphosphines (Scheme 2.22) for hydroformylation and studied the effect of external phosphines such as PPhg. The ligand backbone was constructed via Suzuki-Miyaura reaction, subsequent oxidation of the methyl groups, transformation ofthe formed carboxyl... 

R)- and (S)-(6,6 -Dimethylbiphenyl-2,2 -diyl)bis(diphenylphosphine), BIPHEMP (1). This is the first example of an optically active bis(triarylphosphine) containing the axially disymmetric biphenyl group. The 6,6 -dimethyl groups are used to... 

Dziuba K, Flis A, Szmigielska A, Pietrusiewicz KM (2010) Efficient oxidative resolution of a F-stereogenic triarylphosphine and asymmetric synthesis of a F-stereogenic atropoisomeric biphenyl diphosphine dioxide. Tetrahedron Asymmetry 21 1401-1405... 

IV-Carbazolyl phosphines of the type PPh3 (NCi2H8) (n = 1-3) that are P(m) species with bulky and electron-withdrawing substituents were also converted to the corresponding selenides. The 9,10-dicyanoanthracene- and biphenyl-photosensitized oxidation of triarylphosphines with air was studied in acetonitrile (Scheme 7) and the involvement of a peroxy radical cation (ArsP -O-O ) intermediate was substantiated. ... 

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