Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn¡¯t involve a screen. 12150-46-8, C34H28FeP2. A document type is Article, introducing its new discovery., Recommanded Product: 1,1-Bis(diphenylphosphino)ferrocene
Diastereoselective cyclopalladation of new chiral ferrocenylimines (-)-[(eta5-C5H5)Fe{eta5-C 5H4C(R)=NCH2-(1S,2R,5S)-CHCH2CH 2CHC(CH3)2CHCH2]
Reaction of acylferrocene with (-)-cis-myrtanylamine in benzene gives new chiral ferrocenylimines (-)-[{eta5-C5H4C(R)=NCH 2R*]Fe(eta5-C5H5)] [R = H, (-)-1, or Me, (-)-2; R* = (1S,2R,5S)-CHCH2-CH2CHC(CH3) 2CHCH2]. Asymmetric cyclopalladation of these imines with sodium tetrachloropalladate(II) in methanol gives the di-mu-chloro-bridged dimers (+)-(Sp,Sp)-[Pd{(eta5-C5H 3C(R)=NCH2R*)Fe(eta5-C 5H5)}(mu-Cl)]2. Subsequent treatment of these dimeric complexes with triphenylphosphine, pyridine, and 1,1?-bis(diphenylphosphino)ferrocene (dppf) in acetone yields the corresponding cyclopalladated derivatives (Sp)-[Pd{(eta5-C5H3C(R)=NCH 2R*)Fe(eta5-C5H5)}(PPh 3)Cl], (+)-(Sp)-[Pd{(eta5-C5H 3C(R)=NCH2R*Fe(eta-C5H 5)}(Py)Cl], and (+)-(Sp,Sp)-[PdCl{(eta5-C5H 3C(R)=NCH2R*)Fe(eta5-C 5H5)}(Ph2PC5H4-eta 5)]2Fe, respectively. All compounds have been characterized by NMR, MS, optical rotation, and elemental analysis, and the absolute configuration of two mononuclear complexes, (+)-(Sp)-[Pd{(eta5-C5H 3-CH=NCH2R*)Fe(eta5-C5H 5)}(PPh3)Cl]¡¤1/2C2H5OH and (-)-(Sp-[Pd{eta5-C5H3C(CH 3)=NCH2R*)Fe(eta5-C5H 5)}(PPh3)-Cl], has been determined by single-crystal X-ray analysis.
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Reference£º
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