Lombardo, Marco ; Easwar, Srinivasan ; Pasi, Filippo ; Trombini, Claudio ; Dhavale, Dilip D. (2008) Protonated arginine and lysine as catalysts for the direct asymmetric aldol reaction in ionic liquids Tetrahedron, 64 (39). pp. 9203-9207. ISSN 0040-4020
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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00404...
Related URL: http://dx.doi.org/10.1016/j.tet.2008.07.061
Abstract
Side chain protonation of basic α-amino acids with Brønsted acids provides new effective catalysts for the direct asymmetric aldol reaction of cyclic ketones with aromatic aldehydes in ionic liquids and DMSO. Increased yields are obtained in N-butyl N-methyl pyrrolidinium triflate ([bmpy][TfO]) with respect to DMSO using argininium tosylate (Arg·PTSA) as a 1.3 M aq solution in 10% molar amount with respect to the limiting aldehyde.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| ID Code: | 9498 |
| Deposited On: | 02 Nov 2010 12:04 |
| Last Modified: | 31 May 2011 11:50 |
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