TITLE

Synthesis of sulfated mono- and ditertiary phosphines, complex chemistry and catalysis

AUTHOR(S)
Gulyás, H; Dobó, A; Bakos, J
PUB. DATE
May 2001
SOURCE
Canadian Journal of Chemistry;May2001, Vol. 79 Issue 5/6, p1040
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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 -OSO[sub 3] Li 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][sub 2] and Pt(PhCN)[sub 2] Cl[sub 2] 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.Key words: cyclic sulfates, water soluble phosphines, amphiphilic character, Rh complexes, Pt complexes, hydroformylation.On a préparé des sulfates cycliques et bicycliques à partir d'alcools disponibles facilement. Le clivage nucléophilique des sulfates cycliques conduit à la formation d'un nouveau type de phosphines mono- et ditertiaires, solubles dans l'eau, portant des groupes -OSO[sub 3] Li dans des positions définies du squelette moléculaire. Les deux types de phosphines présentent un caractère amphiphilique. Les réactions du [Rh(COD)Cl][sub 2] et du Ph(PhCN)[sub 2] Cl[sub 2] avec composé chiral 2 et de son analogue à la dppp, 5, conduisent à la formation de nouveaux complexes zwitterioniques. On a pu appliquer avec succès les complexes 2 et 5 du rhodium à l'hydroformylation biphasique liquide du styrène et de l'oct-1-ène. Quand on a utilisé le complexe de rhodium 5 comme catalyseur dans l'hydroformylation du styrène, on n'a détecté que quatre ppm de rhodium dans la phase organique.Mots clés : sulfates cycliques, phosphines solubles dans l'eau, caractère amphiphilique, complexes du rhodium, complexes du platine, hydroformylation.[Traduit par la Rédaction]
ACCESSION #
10580639

 

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