Search Results - "Keppens, Marian"

Novel Syntheses of the Major Flavor Components of Bread and Cooked Rice by De Kimpe, Norbert, Keppens, Marian

“…A new synthetic pathway toward the Maillard flavor compounds 6-acyl-1,2,3,4-tetrahydropyridines and 2-acetyl-1-pyrroline is presented. The reaction sequence…”
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A new approach to symmetric 2,2′:6′,2″-terpyridines by Adrian, James C., Hassib, Lamyaa, De Kimpe, Norbert, Keppens, Marian

“…A novel four step process for the preparation of symmetric terpyridines is presented. The title compound, 2,2′:6′,2″-terpyridine ( 1a) and a substituted…”
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Synthesis of 2-acetyl-1-pyrroline, the principal rice flavor component by De Kimpe, Norbert G, Stevens, Christian V, Keppens, Marian A

“…A new straightforward synthesis of 2-acetyl-l-pyrroline, the principal rice flavor component with a cracker-like flavor, is reported. The reaction sequence…”
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On the Hodge mechanism of the formation of the bread flavor component 6-acetyl-1,2,3,4-tetrahydropyridine from proline and sugars by De Kimpe, Norbert G, Dhooge, Willem S, Shi, Youzhong, Keppens, Marian A, Boelens, Mark M

“…The so-called Hodge mechanism for the generation of 6-acetyl-1,2,3,4-tetrahydropyridine, a major Maillard flavor compound in processed foods, from proline and…”
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Enantioselective Total Syntheses of the Nitraria Alkaloids (-)-Nitramine and (+)-Isonitramine by Keppens, Marian, De Kimpe, Norbert

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New synthetic route to the alkaloid withasomnine by ring transformation of a functionalized cyclopropanol via the parent pyrrolo[1,2-b]pyrazole by Kulinkovich, Oleg, Masalov, Nikolai, Tyvorskii, Vladimir, De Kimpe, Norbert, Keppens, Marian

“…Withasomnine has been prepared by rearrangement of 1-(3-chloropropyl)-cyclopropanol into 5,6-dihydro-4H-pyrrolo[1,2-b]pyrazole, followed by bromination and…”
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Novel routes to indoles, indolines, quinolines and tetrahydroquinolines from N-(Cyclohexylidene)amines by De Kimpe, Norbert, Keppens, Marian

“…Cyclohexanones have been converted into a variety of bicyclic azaheterocycles of different oxidation level via a sequence of reactions involving (a) imination,…”
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Enantioselective synthesis and determination of the configuration of stenusine, the spreading agent of the beetle Stenus comma by Enders, Dieter, Tiebes, Joerg, De Kimpe, Norbert, Keppens, Marian, Stevens, Christian, Smagghe, Guy, Betz, Oliver

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Cyclocondensations of homophthalic anhydrides with 1-aza-1,3-dienes by Georgieva, Angelina, Stanoeva, Elena, Spassov, Stefan, Haimova, Marietta, De Kimpe, Norbert, Boelens, Mark, Keppens, Marian, Kemme, Andrejs, Mishnev, Anatoly

“…α,β-Unsaturated aldimines (1-aza-1,3-butadienes) 2, 4 and 7a-d react with homophthalic anhydrides 1a,b to give 3,4-dihydro-1(2H)-naphthalenone-4-carboxylic…”
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Synthesis of 2-imino-4-thiazolines, 2-imino-4-alkoxythiazolidines, thiazoles and 4-imidazolin-2-ones from α-halomethyl ketimines by De Kimpe, Norbert, De Cock, Wim, Keppens, Marian, De Smaele, Dirk, Mészáros, Andrea

“…A variety of heterocycles, including 3,4‐disubstituted‐2‐imino‐4‐thiazolines, 3,4‐disubstituted‐4‐methoxy‐2‐iminothiazolidines, 2,4‐disubstituted‐thiazoles,…”
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Proof of the Stereochemistry of cis-2,5-Dibromocyclopentanone by Boelens, Mark, De Kimpe, Norbert, Keppens, Marian, Declercq, Jean-Paul

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