Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Leif R. Knöpke"'
Autor:
Sebastian Reimann, Oliver Kühn, Anke Spannenberg, Peter Langer, Angelika Brückner, Ursula Bentrup, Leif R. Knöpke
Publikováno v:
Tetrahedron. 69:3338-3347
Functionalized trifluoromethyl-substituted salicylates have been synthesized based on AlCl3-mediated cyclocondensation reactions using 4,4-dimethoxy-1,1,1-trifluorobut-3-en-2-one and 1,3-bis(silyloxy)-1,3-butadienes. Simultaneous in situ ATR-FTIR/UV
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db6cd21d69b795a6be5077bba5850ee6
https://doi.org/10.1016/j.tet.2013.01.097
https://doi.org/10.1016/j.tet.2013.01.097
Autor:
Peter Langer, Leif R. Knöpke, Sebastian Reimann, Muhammad Sharif, Ralf Ludwig, Christian Roth, Annette-E. Surkus, Kai Wittler
Publikováno v:
Scopus-Elsevier
The Mizoroki-Heck coupling of 1-bromopyrene with acrylates provides a convenient access to a variety of 3-pyrenylacrylates in very good yields (up to 93%). Their photophysical properties combined with solvatochromic effects were studied. In addition,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::725c011ab59f8817118a7c6b86fe8c5b
https://doi.org/10.5560/znb.2013-3004
https://doi.org/10.5560/znb.2013-3004
Autor:
Ursula Bentrup, Angelika Brückner, Sebastian Reimann, Anke Spannenberg, Leif R. Knöpke, Peter Langer
Publikováno v:
Monatshefte für Chemie - Chemical Monthly. 144:421-428
The reaction of 1-methoxy-1,3-bis(silyloxy)-1,3-butadiene with N-salicylideneaniline results in the formation of a functionalized chromane derivative. Diffuse reflectance UV–Vis, ATR-IR, and Raman spectroscopic investigations showed that the reacti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3b4041b346c2cf8ff6fe19cde41a0a4
https://doi.org/10.1007/s00706-012-0890-6
https://doi.org/10.1007/s00706-012-0890-6
Autor:
Angelika Brückner, Ursula Bentrup, Leif R. Knöpke, Guido Walther, Angela Köckritz, Jabor Rabeah, Haijun Jiao, Andreas Martin, Marek P. Checinski
Publikováno v:
Journal of Catalysis. 297:44-55
During the last decade, an increased attention could be observed being paid on the use of renewables resources in the polymer and fine chemistry. Sunflower oil has been shown to be catalytically transformed into dimethyl 1,19-nonadecanedioate, using
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7873a0fa4bf8d58908c5da71b7cc13dc
https://doi.org/10.1016/j.jcat.2012.09.016
https://doi.org/10.1016/j.jcat.2012.09.016
Autor:
Angelika Brückner, Ursula Bentrup, Leif R. Knöpke, Daniele Addis, Kathrin Junge, Matthias Beller, Shoubhik Das
Publikováno v:
Angewandte Chemie: international edition in English
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07594c94658f5ad98012df4a55bd143a
https://doi.org/10.1002/ange.201104226
https://doi.org/10.1002/ange.201104226
Autor:
Peter Langer, Christian Roth, Leif R. Knöpke, Alexander Villinger, Muhammad Sharif, Sebastian Reimann, Ralf Ludwig, Kai Wittler, Annette-E. Surkus
Publikováno v:
European Journal of Organic Chemistry. 2011:5261-5271
As a new approach for tuning the electronic properties of pyrene derivatives, we converted 1-bromopyrene into different substituted styrenes using the Mizoroki–Heck reaction. Several 1-(arylalkenyl)pyrenes have been characterized and their electron
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e526acec45247cba4331b2054703dcf
https://doi.org/10.1002/ejoc.201100620
https://doi.org/10.1002/ejoc.201100620
Autor:
Sebastian Reimann, Leif R. Knöpke, Angelika Brückner, Peter Langer, Anke Spannenberg, Ursula Bentrup
Publikováno v:
ChemCatChem. 3:1459-1468
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84d8c2c0a81556bfaef049306b5118df
https://doi.org/10.1002/cctc.201100150
https://doi.org/10.1002/cctc.201100150
Publikováno v:
ChemCatChem. 2:273-280
Coupled ATR-FTIR, UV/Vis, and Raman spectroscopy has been introduced for the monitoring of liquid phase hydrogenation reactions under elevated H2 pressure by implementation of spectroscopic immersion probes into a modified autoclave reactor. The setu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19017a5cddfaaaf59903d00bc8ba69f9
https://doi.org/10.1002/cctc.200900273
https://doi.org/10.1002/cctc.200900273
Autor:
Leif R. Knöpke, Ursula Bentrup
Publikováno v:
Heterogeneous Catalysts for Clean Technology: Spectroscopy, Design, and Monitoring
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7787f7dbd1cf096c5e7c54626ea13942
https://doi.org/10.1002/9783527658985.ch3
https://doi.org/10.1002/9783527658985.ch3
Publikováno v:
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy. 95
Six selected benzylidene aniline-type prochiral imines were characterised by means of ATR-IR, UV–vis and Raman spectroscopy. A detailed UV–vis spectroscopic study supported by data obtained from single crystal X-ray analysis reveals the influence
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7867dc80c4dbcb472459f39bd907228b
https://pubmed.ncbi.nlm.nih.gov/22613119
https://pubmed.ncbi.nlm.nih.gov/22613119