201419-90-1Relevant academic research and scientific papers
Synthesis of sulfated mono- and ditertiary phosphines, complex chemistry and catalysis
Gulyas,Dobo,Bakos
, p. 1040 - 1048 (2007/10/03)
Cyclic and bicyclic sulfates have been prepared from commonly available alcohols. Nucleophilic cleavage of the cyclic sulfates affords a new type of water-soluble mono- and ditertiary phophines bearing -OSO3Li groups in distinguished positions in the molecular framework. Both phosphines have amphiphilic character. Reactions of the chiral 2 and the dppp analogue 5 with [Rh(COD)Cl]2 and Pt(PhCN)2Cl2 provide novel zwitterionic complexes. Rhodium complexes of 2 and 5 have been successfully applied in liquid biphasic hydroformylation of styrene and octene-1. When the rhodium complex of 5 was used as catalyst in hydroformylation of styrene, less then 4 ppm rhodium could be detected in the organic phase.
A new route for the synthesis of amphiphilic and water-soluble ligands: Monoand di-tertiary phosphines having an alkylene sulfate chain
Gulyas, Henrik,Arva, Peter,Bakos, Jozsef
, p. 2385 - 2386 (2007/10/03)
Cyclic sulfates react with LiPPh2 to form a series of new amphiphilic or water-soluble ligands: monotertiary phosphines with one or two alkylene sulfate chains and ditertiary phosphines with one or two hydrophilic tails attached to bridgehead carbon atom; the application of zwitterionic RhI complexes (sulfatephos)2Rh(cod) and (sulfatediphos)Rh(cod) in liquid biphasic catalysis has been demonstrated for the hydroformylation of styrene and oct-1-ene.
