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Synthesis 2006(10): 1697-1700
DOI: 10.1055/s-2006-926450
DOI: 10.1055/s-2006-926450
SPECIALTOPIC
© Georg Thieme Verlag Stuttgart · New York
Trans Effect on Cobalt Porphyrin Catalyzed Asymmetric Cyclopropanation
Weitere Informationen
Received
16 February 2006
Publikationsdatum:
27. April 2006 (online)
Publikationsverlauf
Publikationsdatum:
27. April 2006 (online)
![](https://www.thieme-connect.de/media/synthesis/200610/lookinside/thumbnails/10.1055-s-2006-926450-1.jpg)
Abstract
A significant trans effect of potential coordinating additives was found in asymmetric cyclopropanation catalyzed by Co(II) complexes of D 2 -symmetric chiral porphyrins [Co(1)]. Among different additives, substoichiometric amounts of DMAP resulted in substantial increases in both diastereoselectivity and enantioselectivity. A related solvent effect on the catalytic system was also observed.
Key words
cyclopropanation - chiral porphyrins - cobalt - trans effect - asymmetric catalysis
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