RECOVERABLE CATALYSTS FOR ASYMMETRIC REDUCTION OF IMINES: SYNTESIS AND EVALUATION OF ACTIVITIES

RECOVERABLE CATALYSTS FOR ASYMMETRIC REDUCTION OF IMINES: SYNTESIS AND EVALUATION OF ACTIVITIES

von Marek Figlus
Taschenbuch - 9783639250718
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Beschreibung

Obtaining chiral amines from ketones via imine intermediates represents an attractive strategy that opens a straightforward route to valuable building blocks for the pharmaceutical and other fine chemicals industries. Metal-free oranocatalysis can be viewed as an attractive and broadly applicable methodology in which the metal is not vital for the key bond-forming event. N-methylvaline-derived formamides proved to be efficient catalysts for asymmetric reduction of prochiral ketimines with trichlorosilane, (up to 98%, 95% ee). Tagging the catalyst to a fluorous ponytail, soluble and insoluble polymers, or gold nanoparticles simplified the isolation procedure, while preserving high activities and stereoselectivities (up to 98%, 91% ee). The recovered catalysts could be reused at least 5 times without the loss of activity or stereoselectivity. This technology appears to be particularly suited to the small-scale parallel chemistry.

Details

Verlag VDM Verlag
Ersterscheinung April 2010
Maße 220 mm x 150 mm x 11 mm
Gewicht 290 Gramm
Format Taschenbuch
ISBN-13 9783639250718
Auflage Nicht bekannt
Seiten 184

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