Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Clemens C. Freyhardt"'
Publikováno v:
European Journal of Organic Chemistry. 2001:1655-1661
Benzyl sialoside 1 was transformed into the corresponding 5-azido derivative 4 by N-nitrosation of the 5-acetylamino group and treatment with base followed by hydrazoic acid or, alternatively, by N,O-deacetylation followed by diazo group transfer to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b5fc196e1a52c7993131490a41845d5
https://doi.org/10.1002/1099-0690(200105)2001:9<1655::aid-ejoc1655>3.0.co
https://doi.org/10.1002/1099-0690(200105)2001:9<1655::aid-ejoc1655>3.0.co
Autor:
Stacey I. Zones, Michael Tsapatsis, Mark E. Davis, Cong Yan Chen, Clemens C. Freyhardt, Paul Wagner, Raul F. Lobo, Shervin Khodabandeh, Kenneth J. Balkus
Publikováno v:
Journal of the American Chemical Society. 119:8474-8484
The molecular sieve UTD-1 is investigated using scanning and transmission electron microscopies (TEM), solid-state NMR spectroscopy, electron (ED) and X-ray diffraction (XRD), adsorption studies, and catalytic test reactions. The results confirm that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e07c1bcdcf87e71fd042dbc3e5ff20d5
https://doi.org/10.1021/ja9708528
https://doi.org/10.1021/ja9708528
Autor:
W. Wirschun, Johannes C. Jochims, Rajab Abu-El-Halawa, Ahmed H. Moustafa, Clemens C. Freyhardt
Publikováno v:
Journal für Praktische Chemie/Chemiker-Zeitung. 339:615-622
N-Alkylnitrilium salts (1) undergo ene reactions with electron-rich di- and higher substituted alkenes 2 to afford either 2-azoniaallene salts (3, 6, 9, 11) (the nitrilium salt reacting as ene and the alkene reacting as enophile) or 1-azonia-1,4-pent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72912ae281cffc075aed973dca454d0b
https://doi.org/10.1002/prac.199733901110
https://doi.org/10.1002/prac.199733901110
Publikováno v:
Nature. 381:295-298
Zeolites (microporous aluminosilicates) and related molecular sieves have found wide application as catalysts, sorbents and ion-exchange materials. New zeolites with large pores are much in demand, and have been sought for several decades. All known
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9cdf1bc02843a6d1bcdfecf09134981f
https://doi.org/10.1038/381295a0
https://doi.org/10.1038/381295a0
Publikováno v:
The Journal of Physical Chemistry. 100:5039-5049
Single crystals (up to 580 × 480 × 20 μm) of highly silicious ferrierite (Si-FER, 1), suitable for single-crystal X-ray investigations, are synthesized under organothermal conditions. The structures of the as-synthesized (1a) and the calcined (1b)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ddb8a8af05c01d8b75058d881e00e4d
https://doi.org/10.1021/jp9530055
https://doi.org/10.1021/jp9530055
Autor:
Matthew M. Helmkamp, Stacey I. Zones, Clemens C. Freyhardt, Raul F. Lobo, John E. Lewis, M. Pan, Shervin Khodabandeh, Miles Davis, Michael Tsapatsis, Miguel A. Camblor, Masahito Yoshikawa
Publikováno v:
Journal of the American Chemical Society. 118:7299-7310
Relatively large (up to 4 μm), needle-like crystals of the high-silica molecular sieve VPI-8 are synthesized by hydrothermal methods and are subsequently calcined to remove the pore-filling organic...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8378e578fd71a29c74c30b8bef8fc9de
https://doi.org/10.1021/ja954337q
https://doi.org/10.1021/ja954337q
Publikováno v:
Angewandte Chemie. 107:2895-2898
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7551e95e4d4c14f89a5991a46670d6df
https://doi.org/10.1002/ange.19951072322
https://doi.org/10.1002/ange.19951072322
Publikováno v:
Zeitschrift f�r anorganische und allgemeine Chemie. 621:311-322
The cobalticinium cation [CoIII(η5-C5H5)2]+ Cocp2+ is the first metal-organic complex that acts as a structure-directing template in the hydrothermal synthesis of microporous solids. Three different clathrasil framework structures – nonasil (NON),
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a61bb72bd41dfbb16e49aff8b76e09f
https://doi.org/10.1002/zaac.19956210218
https://doi.org/10.1002/zaac.19956210218
Publikováno v:
Journal of Inclusion Phenomena and Molecular Recognition in Chemistry. 18:161-175
Single-crystal X-ray structure analyses of N(nPr)4[B5O6(OH)4][B(OH)3]2,1, and N(nBu)4 [B5O6(OH)4][B(OH)3]2,2, reveal that these materials are novel clathrates, the isotypic host structures of which are three-dimensional assemblies of hydrogen-bonded
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::551cf6f4e5ac378f2dc0983228d8c586
https://doi.org/10.1007/bf00705819
https://doi.org/10.1007/bf00705819
Publikováno v:
Synthesis. 1994:509-515
1,3-Diaryl-1,3-dichloro-2-azoniaallene salts 1 react with di-, tri- and tetraalkyl and aryl substituted olefins to form new types of 2-azonia-allene salts 4, a 4-azapentadienyl salt 5e or pyridinium salts 8, respectively. The cycloaddition of olefins
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c1ae0d11d5c2285899c6d148223fb4f
https://doi.org/10.1055/s-1994-25514
https://doi.org/10.1055/s-1994-25514