Enantioselective epoxidation of isoflavones by Jacobsen's Mn(III)salen catalysts and dimethyldioxirane oxygen-atom source

Tetrahedron Asymmetry

Volumn 9, Issue 7, 1998, Pages 1121-1124

  Adam, Waldemar ^a   Fell, Rainer T ^a   Lévai, Albert ^b   Patonay, Tamás ^b   Peters, Karl ^c   Simon, András ^d   Tóth, Gábor ^d  

^a UNIVERSITY OF WÜRZBURG   (Germany)

^b UNIVERSITY OF DEBRECEN   (Hungary)

^c MAX PLANCK INSTITUT FÜR FESTKÖRPERFORSCHUNG   (Germany)

^d BUDAPEST UNIVERSITY OF TECHNOLOGY AND ECONOMICS   (Hungary)

Author keywords

[No Author keywords available]

Indexed keywords

DIMETHYLDIOXIRANE; ISOFLAVONE; ISOFLAVONE DERIVATIVE; ISOFLAVONE EPOXIDE; MANGANESE(III) SALEN; OXIDIZING AGENT; UNCLASSIFIED DRUG;

ARTICLE; CATALYST; ENANTIOMER; EPOXIDATION; MICROANALYSIS; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; OPTICAL ROTATION; PRIORITY JOURNAL; X RAY DIFFRACTION;

EID: 0032499274     PISSN: 09574166     EISSN: None     Source Type: Journal    
DOI: 10.1016/S0957-4166(98)00102-5     Document Type: Article

References (27)

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26. 2 (10.0 ml) and the stirring was continued at room temperature (ca. 20°C). The progress of the reaction was monitored by TLC and new batches of DMD were added in 24 h intervals until the conversion of the starting material halted (10 days). The solvent was evaporated (ca. 25°C/15 torr) and the epoxides 2a-f (Scheme 1 and Table 1) were purified by silica-gel chromatography.
27. 1; a=5.5799(5) Å, b=9.905(1) Å, c=29.562(3) Å. Determination of the absolute configuration was based on the Flack parameter (SHELXL>93). The X-ray data are deposited in the Cambridge Crystallographic Date Centre, 12 Union Road, Cambridge, CB2 1EZ, UK.