Two novel chiral C-2-symmetrical ferrocenyl 'salen-type' ligands were prepared via reaction of suitable ferrocenyldiamines with 3,5-di-tert-butylsalicylaldehyde and tested in the asymmetric epoxidation of unfunctionalized alkenes. Although the asymmetric induction was quite low, an unusually high trans/cis-epoxide ratio and high reactivity of a trans-alkene substrate were observed. (c) 2007 Elsevier Ltd. All rights reserved.
Two novel chiral C2-symmetrical ferrocenyl ‘salen-type’ ligands were prepared via reaction of suitable ferrocenyldiamines with 3,5-di-tert-butylsalicylaldehyde and tested in the asymmetric epoxidation of unfunctionalized alkenes. Although the asymmetric induction was quite low, an unusually high trans/cis-epoxide ratio and high reactivity of a trans-alkene substrate were observed.
Synthesis of novel chiral salen-type ferrocenyl ligands
BALLISTRERI, Francesco Paolo;TOMASELLI, Gaetano;TOSCANO, Rosa Maria
2007-01-01
Abstract
Two novel chiral C-2-symmetrical ferrocenyl 'salen-type' ligands were prepared via reaction of suitable ferrocenyldiamines with 3,5-di-tert-butylsalicylaldehyde and tested in the asymmetric epoxidation of unfunctionalized alkenes. Although the asymmetric induction was quite low, an unusually high trans/cis-epoxide ratio and high reactivity of a trans-alkene substrate were observed. (c) 2007 Elsevier Ltd. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
