Zobrazeno 1 - 10
of 31
pro vyhledávání: '"R. Neeter"'
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 87:572-579
In a model study directed towards the synthesis of 5,10-diazasteroids, piperidazine was condensed with 2-methoxycarbonylmethylcyclohexanone (2) to give decahydro-Δ7a(11a)-6-oxopyridazo[1,2-a]cinnoline (4). Reduction of 4 with lithium aluminium hydri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6be693d4c76bfd537035809e31d02c53
https://doi.org/10.1002/recl.19680870510
https://doi.org/10.1002/recl.19680870510
Publikováno v:
International Dairy Journal. 7:255-263
Volatile constituents present in the water-soluble fraction (WSF) of eight hard-type cheeses (Cheddar, Edam, Gouda, Gouda 20+, Proosdij, Maasdam, Gruyere and Parmesan) were isolated and identified by using a dynamic headspace technique. The compounds
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7d9e9f56b730b2c06b193d05bb64fe3
https://doi.org/10.1016/s0958-6946(97)00003-4
https://doi.org/10.1016/s0958-6946(97)00003-4
Akademický článek
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Publikováno v:
Zeitschrift f�r Lebensmittel-Untersuchung und -Forschung. 161:231-238
Depending on the types of solvent and catalyst, different products are formed in the reaction of hydrogen sulphide with 2-alkenals. The structures of many of these products have been elucidated, and the reaction sequences leading to them are proposed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::31a78fc28135fe0531a43b8828052d65
https://doi.org/10.1007/bf01105808
https://doi.org/10.1007/bf01105808
Autor:
Nico M. M. Nibbering, R. Neeter
Publikováno v:
Tetrahedron. 28:2575-2585
In the molecular ion of the title compound some interesting rearrangements occur, as shown by diffuse peaks for the following reactions: 1. Elimination of a molecule of water and of a hydroxycarbonyl radical from the molecular ion pointing to transfo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e5f6579e86ec8e45c92b161dd46bb8c2
https://doi.org/10.1016/0040-4020(72)80092-9
https://doi.org/10.1016/0040-4020(72)80092-9
Publikováno v:
Organic Mass Spectrometry. 3:597-603
Comparison of the mass spectrum of γ-picoline with that of analogues, specifically deuterated in the methyl group, the ring or both, has shown that the molecular ion loses the α,β and methyl hydrogen atoms (ω-hydrogen') in the ratio 1.43: 1: 1. 1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6a659f8170412c8fc992967d564aa32
https://doi.org/10.1002/oms.1210030508
https://doi.org/10.1002/oms.1210030508
Autor:
Nico M. M. Nibbering, R. Neeter
Publikováno v:
Organic Mass Spectrometry. 5:735-742
From the mass spectra of site-specifically deuterated analogues of isonicotinic acid it appears that the molecular ion eliminates hydroxyl and water after an exchange between the hydroxylic and β-hydrogens. The percentage of exchange in these reacti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d20b79c2766368451f229fb20fdb1597
https://doi.org/10.1002/oms.1210050612
https://doi.org/10.1002/oms.1210050612
Autor:
Nico M. M. Nibbering, R. Neeter
Publikováno v:
Organic Mass Spectrometry. 7:1091-1101
A strong secondary isotope effect is observed in the preferred loss of methyl vs. trideutero-methyl from the molecular ions of appropriately labelled 4-t-butylpyridine and t-butylbenzene decomposing in the first and second field free regions of a dou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::586ff22e1b947d81575c53076c07ebdf
https://doi.org/10.1002/oms.1210070910
https://doi.org/10.1002/oms.1210070910