2,2'-disubstituted 1,1'-diphosphino-ferrocenes and 1',2-disubstituted 1-phosphino-ferrocenes, processes for preparing them, their use, and transition metal complexes comprising them
The present invention relates to optically active and racemic C2-symmetric 2,2'-disubstituted 1,1'-diphosphino-ferrocenes of the formula Ia, to optically active and racemic asymmetric 1',2-disubstituted 1-phosphino-ferrocenes of the formula Ib and to achiral 2,2'-disubstituted 1,...
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Main Author | |
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Format | Patent |
Language | English |
Published |
05.01.1999
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Edition | 6 |
Subjects | |
Online Access | Get full text |
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Summary: | The present invention relates to optically active and racemic C2-symmetric 2,2'-disubstituted 1,1'-diphosphino-ferrocenes of the formula Ia, to optically active and racemic asymmetric 1',2-disubstituted 1-phosphino-ferrocenes of the formula Ib and to achiral 2,2'-disubstituted 1,1'-diphosphino-ferrocenes of the formula II, to processes for preparing them, especially in accordance with the principle of asymmetric ortho-lithiation, to their use as ligands for transition metal complexes, to transition metal complexes comprising them, and to the use of the transition metal complexes as catalysts, especially in asymmetric syntheses. I |
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Bibliography: | Application Number: US19970847448 |