166273-39-8Relevant academic research and scientific papers
Direct C-C Bond Formation from Alkanes Using Ni-Photoredox Catalysis
Ackerman, Laura K. G.,Martinez Alvarado, Jesus I.,Doyle, Abigail G.
supporting information, p. 14059 - 14063 (2018/10/24)
A method for direct cross coupling between unactivated C(sp3)-H bonds and chloroformates has been accomplished via nickel and photoredox catalysis. A diverse range of feedstock chemicals, such as (a)cyclic alkanes and toluenes, along with late-stage intermediates, undergo intermolecular C-C bond formation to afford esters under mild conditions using only 3 equiv of the C-H partner. Site selectivity is predictable according to bond strength and polarity trends that are consistent with the intermediacy of a chlorine radical as the hydrogen atom-abstracting species.
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
