ASYMMETRIC DOUBLE-BOND ISOMERIZATION OF CYCLIC ALLYL ACETALS BY USINGDIOP AND CHIRAPHOS MODIFIED NICKEL-COMPLEXES

Authors
FRAUENRATH H REIM S WIESNER A
Citation
H. Frauenrath et al., ASYMMETRIC DOUBLE-BOND ISOMERIZATION OF CYCLIC ALLYL ACETALS BY USINGDIOP AND CHIRAPHOS MODIFIED NICKEL-COMPLEXES, Tetrahedron : asymmetry, 9(7), 1998, pp. 1103-1106
Citations number
21
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Inorganic & Nuclear","Chemistry Physical
Journal title
Tetrahedron : asymmetry → ACNP
ISSN journal
09574166
Volume
9
Issue
7
Year of publication
1998
Pages
1103 - 1106
Database
ISI
SICI code
0957-4166(1998)9:7<1103:ADIOCA>2.0.ZU;2-7
Abstract
Diop or chiraphos modified dibromo- and dichloronickel complexes prove d to be readily available catalyst precursors, which upon activation w ith lithium triethylborohydride (Super-Hydride(R)) gave enantioselecti vities up to 92% ee for the asymmetric isomerization of 5-methylene-1, 3-dioxanes 3 and up to 67% ee for the asymmetric isomerization of 4,7- dihydro-1,3-dioxepins 1. (C) 1998 Elsevier Science Ltd. All rights res erved.