Zobrazeno 1 - 10
of 16
pro vyhledávání: '"E.A. Gunnewegh"'
Publikováno v:
Journal of Molecular Catalysis A: Chemical. 106:151-158
Molecular sieves of the MCM-41 type were studied as catalysts for the Friedel-Crafts acylation of 2-methoxynaphthalene in the liquid phase. When MCM-41 in the H + form is used as Bronsted-acid catalyst, acylation with acetic anhydride gives substitut
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c408f4d057184aa616c955c71b8e41c8
https://doi.org/10.1016/1381-1169(95)00270-7
https://doi.org/10.1016/1381-1169(95)00270-7
Publikováno v:
Catalysis Letters. 39:57-62
The state of the acylating agent acetyl chloride, adsorbed on a series of proton and metal ion exchanged zeolites X, Y (faujasite) and ZSM-5, was investigated by13C MAS NMR spectroscopy. The observed carbonyl signals were assigned to two species: che
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b2d2a4f62c2b16528e0727e2e5a7ea6
https://doi.org/10.1007/bf00813730
https://doi.org/10.1007/bf00813730
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 115:226-230
Zeolite H-BEA and other solid acids have been shown to be effective catalysts for the production of coumarin derivatives from activated phenols and acids or esters possessing an additional alkylation function, or β-keto esters (Pechmann reaction). T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1da2c296a901428c8894abc584c13f66
https://doi.org/10.1002/recl.19961150407
https://doi.org/10.1002/recl.19961150407
Publikováno v:
Journal of Molecular Catalysis A: Chemical. 100:87-92
The direct synthesis of coumarin derivatives from m-substituted phenols and α,β-unsaturated carboxylic acids catalysed by solid-acid catalysts, such as zeolite H-Beta or Amberlyst-15, in toluene as solvent was studied. The conversion involves ester
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d2ae9ea451d45d47d12a8cf80b6dfd06
https://doi.org/10.1016/1381-1169(95)00156-5
https://doi.org/10.1016/1381-1169(95)00156-5
Publikováno v:
ChemInform. 26
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d94c62a4bce2732eac98c41fd3eab4bf
https://doi.org/10.1002/chin.199524127
https://doi.org/10.1002/chin.199524127
Summary The intramolecular acylation of 4-phenylbutyric acid was investigated as a model reaction for Friedel-Crafts acylation catalysed by zeolites in the liquid phase. This reaction is catalysed by zeolite H-Beta in 4-chlorotoluene as solvent. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3c8347736ff81666090324bdc514cae
https://doi.org/10.1016/s0167-2991(06)81921-x
https://doi.org/10.1016/s0167-2991(06)81921-x
Autor:
A. J. Hoefnagel, H. van Bekkum, M. A. van Koten, E.A. Gunnewegh, Herman W. Kouwenhoven, A.H.G. Vogt
The development of catalytic procedures in aromatic acylation is a priority because the current industrial methods apply stoichiometric or excess amounts of metal chlorides or mineral acids as “catalysts”. The paper reviews zeolite catalysis in t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d83fab94b56d6cda41d8609b7bba35c2
https://doi.org/10.1016/s0167-2991(08)63279-6
https://doi.org/10.1016/s0167-2991(08)63279-6
Publikováno v:
Journal of the Chemical Society, Chemical Communications. :225
Syntheses of substituted 7-hydroxycoumarins via reactions of 1,3-dihydroxybenzene with ethyl acetoacetate (Pechmann reaction) and with propenoic acid and propynoic acids are reported, in which the production of environmentally harmful waste streams i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46bb530bb737d64ff199c7a955748c7b
https://doi.org/10.1039/c39950000225
https://doi.org/10.1039/c39950000225
Kniha
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Kniha
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.