Electric Literature of 12150-46-8. Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 12150-46-8, Name is 1,1-Bis(diphenylphosphino)ferrocene
The reactions of the zerovalent palladium complex [Pd2(dba)3]·CHCl3 (dba = dibenzylideneacetone, PhCH=CH-C(O)-CH= CHPh), in the presence of bidentate phosphorus ligand L2 and dioxygen, with esters of 3-oxopentanedioic acid (RCH2COCH2R) in diethylether, afford, in good yield, the palladocyclobutan-3-one compounds [Pd(CHRCOCHR)L2] [R = CO2Me, L2 = dppe, dppp, dppb, dppf]. The compounds [Pd(CHRCOCHR)L2] [R = CO2Me, L2 = dppe, dppp, dppb, dppf; R = CO2Et, L2 = dppe] are also formed by treating dichloromethane solution of [Pd(COD)Cl2] (COD = cyclo-octa-1,5-diene) with RCH2COCH2R in the presence of silver(I) oxide and the appropriate bidentate ligand. Ligand exchange reactions of [Pd(eta3-CHRCOCHR)(L?)2], (R = CO2Me, L? = PPh3 or AsPh3) complexes with appropriate chelating phosphorus donor ligand in dichloromethane have also afforded new complexes [Pd(CHRCOCHR)L2] (L? = PPh3, L2 = dppe, dppp; L? = AsPh3, L2 = dppe, dppp, dppb, dppf). Spectroscopic data (IR, NMR, FAB MS) for the new compounds are reported.
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Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate