NEW CARBOHYDRATE BISPHOSPHITES AS CHIRAL LIGANDS

Authors
KADYROV R HELLER D SELKE R
Citation
R. Kadyrov et al., NEW CARBOHYDRATE BISPHOSPHITES AS CHIRAL LIGANDS, Tetrahedron : asymmetry, 9(2), 1998, pp. 329-340
Citations number
36
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Inorganic & Nuclear","Chemistry Physical
Journal title
Tetrahedron : asymmetry → ACNP
ISSN journal
09574166
Volume
9
Issue
2
Year of publication
1998
Pages
329 - 340
Database
ISI
SICI code
0957-4166(1998)9:2<329:NCBACL>2.0.ZU;2-D
Abstract
The synthesis of the 2,3-bisphosphite derivatives of phenyl 4,6-O-benz ylidene-beta-D-glucopyranoside leads to new chelating ligands. Their r hodium(I) and platinum(II) complexes have been tested as catalysts for the asymmetric hydroformylation of vinyl acetate, allyl acetate and p -methoxystyrene. Good regioselectivity (>90% branched product), but an enantioselectivity of only less than or equal to 36% ee were found un der mild reaction conditions (25-40 degrees C, 40-70 bar syngas). (C) 1998 Elsevier Science Ltd. All rights reserved.