Abstract:
:Saturated aqueous solutions of various common salts were examined for their effect on aqueous aldol reactions catalysted by a highly active C(2)-symmetric diprolinamide organocatalyst developed in our laboratory. With respect to the aldol reaction between cyclohexanone and 4-nitrobenzaldehyde, deionised water was always a superior medium to salt solutions though some correlation to increasing anion size and depression in enantiomeric excess could be observed. Additionally, the complete inhibition of catalyst activity observed when employing tap water could be alleviated by the inclusion of ethylenediaminetetraacetate (EDTA) into the aqueous media prior to reaction initiation. Extension of these reaction conditions demonstrated that these ionic effects vary on a case-to-case basis depending on the ketone/aldehyde combination.
journal_name
Int J Mol Scijournal_title
International journal of molecular sciencesauthors
Delaney JP,Henderson LCdoi
10.3390/ijms12129083subject
Has Abstractpub_date
2011-01-01 00:00:00pages
9083-94issue
12issn
1422-0067pii
ijms-12-09083journal_volume
12pub_type
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