439858-53-4Relevant academic research and scientific papers
Recyclable enamine catalysts for asymmetric direct cross-aldol reaction of aldehydes in emulsion media
Gao, Qiang,Liu, Yan,Lu, Sheng-Mei,Li, Jun,Li, Can
supporting information; experimental part, p. 1983 - 1985 (2011/10/09)
Highly diastereo- and enantioselective cross-aldol reactions of aldehydes (>20:1 dr, 99% ee), catalyzed by chiral diamine-polyoxometalate acid combined enamine catalysts in emulsion media, are reported. This type of catalysts can be recycled several times
Microwave assisted synthesis of enantiomerically pure allylboronates
Cmrecki, Vesna,Eichenauer, Nils C.,Frey, Wolfgang,Pietruszka, J?rg
experimental part, p. 6550 - 6564 (2010/10/19)
Stable allylboronates with a stereogenic centre α to the boronic ester moiety represent versatile reagents for stereoselective synthesis of homoallylic alcohols. Use of microwave irradiation in desilylation and sigmatropic rearrangement reactions allows r
Combined proline-surfactant organocatalyst for the highly diastereo- and enantioselective aqueous direct cross-aldol reaction of aldehydes
Hayashi, Yujiro,Aratake, Seiji,Okano, Tsubasa,Takahashi, Junichi,Sumiya, Tatsunobu,Shoji, Mitsuru
, p. 5527 - 5529 (2007/10/03)
(Chemical Equation Presented) Why not combine the two? The asymmetric direct aldol reaction of two different aldehydes was catalyzed by a combined proline-surfactant organic catalyst in the presence of water. A stable emulsion was formed in the reaction mixture, and the aldols were obtained with excellent diastereo- and enantioselectivities (see scheme).
[2+3] Cycloadditions between nitroalkenes and camphor-derived oxazoline N-oxides and radical denitration of the adducts
Voituriez, Arnaud,Moulinas, Julien,Kouklovsky, Cyrille,Langlois, Yves
, p. 1419 - 1426 (2007/10/03)
[2+3] Cycloadditions between camphor-derived oxazoline N-oxide 2 and nitroalkenes 3a-f afforded stereoselectively adducts 4a-f. Radical denitration followed by acidic hydrolysis gave rise to anti-aldols 8a,b. The radical intermediate was also trapped by a suitable alkene, giving rise to a single stereoisomer.
