Dehydrogenation of organolanthanide alkoxides and X-ray crystal structure of reaction product [(C₅H₅)₂Yb(µ-OCHCCH₂)]₂

Abstract

Cp,Yb] reacts with HOR (Cp = C5H5; R = CHzCH=CH2, CH2CH2Me) in thf (thf = tetrahydrofuran) at room temperature to give complexes [{Cp2Yb(p-OR)}2], which are dehydrogenated to yield the new complex [{Cp,Yb(p-OCH=C=CH2,)21 in refluxing thf solution; the X-ray crystal structure shows that the new complex is dimeric with oxygen atoms as bridging groups.

Bis(cyclopentadienyl)yttrium Complexes of the Ligand [N(QPPh2)2]- (Q = S, Se): Synthesis, Structure, and NMR Properties of Cp2Y[η3-N(QPPh2)2]

“…The protonolysis reaction is a general one for Cp 3 Ln (Ln = Y or rare-earth element) compounds. − The route provides a clean way to make substituted Cp 2 Ln compounds. The synthesis entails protonating and displacing a Cp ring on the Ln atom by an acid stronger than cyclopentadienene (HCp) .…”

Synthesis of novel chiral Schiff bases and their application in asymmetric transfer hydrogenation of prochiral ketones

“…Chiral alcohols are very important synthetic intermediates and building blocks in organic synthesis and the pharmaceutical industry. Asymmetric transfer hydrogenation (ATH) of prochiral ketones to enantiomerically pure secondary alcohols provides an attractive alternative to asymmetric hydrogenation due to its operational simplicity, the easy availability of hydrogen sources, lower cost, and safety [1][2][3][4][5][6][7][8]. Noyori's ruthenium complexes containing arene and N-( p-toluenesulfonyl)-1,2-diphenylethylenediamine (TsDPEN) ligands are efficient catalysts for the asymmetric transfer hydro- genation of ketones [9][10][11][12].…”