166273-40-1Relevant academic research and scientific papers
Visible light-driven Giese reaction with alkyl tosylates catalysed by nucleophilic cobalt
Komeyama, Kimihiro,Michiyuki, Takuya,Teshima, Yoshikazu,Osaka, Itaru
, p. 3539 - 3546 (2021)
The scope of the Giese reaction is expanded using readily available alkyl tosylates as substrates and nucleophilic cobalt(i) catalysts under visible-light irradiation. The reaction proceeds preferentially with less bulky primary alkyl tosylates. This unique reactivity enables the regio-selective Giese reaction of polyol derivatives.
Problems in Selective Catalysis with Molecular Imprints in Silica - Selective Lactones Formation from Hydroxyesters in Micropores
Heilmann, Jens,Maier, Wilhelm F.
, p. 460 - 468 (2007/10/02)
Selective lactone formation from hydroxy esters can be obtained with microporous glass catalysts.By a sol-gel polycocondensation of TEOS and a cyclic phosphonate an imprinted microporous silica catalyst was prepared.The imprint molecule selected is a transition state analogue for the lactone formation from hydroxy esters.Although selective γ- and δ-lactone formation from the respective hydroxy esters was observed, control experiments revealed, that the catalytic selectivity of the lactone formation is already obtained by the micropores of the material and not associated to the imprint.The study illustrates the importance of proper control experiments for the evaluation of imprint effects in selectively catalyzed reactions. - Keywords: Micropores, Selective Lactones Formation, Silica Catalyst
