Zobrazeno 1 - 10 of 15 pro vyhledávání: '"Noel W. Jacobsen"'
1
ChemInform Abstract: N-AMINOPYRIMIDINES: THE ISOMERIZATION OF 1-AMINOBARBITURIC ACIDS TO 2-(5-OXO-4,5-DIHYDRO-1H-1,2,4-TRIAZOL-3-YL) ALIPHATIC ACIDS
Autor: Bruce L. McCarthy, Noel W. Jacobsen, Stephanie S. Smith
Publikováno v: Chemischer Informationsdienst. 10
1-Aminobarbituric acid undergoes a facile isomerization in aqueous acid to 2-(5-Oxo-4, 5-dihydro-1H-l, 2, 4-triazol-3-yl)acetic acid which in turn can be decarboxylated to give 3-methyl-1H-1, 2, 4-triazol-5(4H)-one. The isomerization reaction is show
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9ad8820c5258014f16f452e0bb187a66
https://doi.org/10.1002/chin.197917265
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2
ChemInform Abstract: N-AMINOPYRIMIDINES. THE SYNTHESIS AND REACTIONS OF 1-AMINOBARBITURIC ACIDS
Autor: Noel W. Jacobsen, Bruce L. McCarthy
Publikováno v: Chemischer Informationsdienst. 10
A general synthesis of 1-aminobarbituric acid, 1-amino-2-thiobarbituric acid and their 5-alkyl derivatives is described together with reactions and properties which confirm their structure.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7e0fa96f54fb1bf28e5aa5a52efbcecf
https://doi.org/10.1002/chin.197917294
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6
ChemInform Abstract: PYRIMIDINE N-OXIDES. IV. THE N,N′-DIHYDROXY DERIVATIVES OF PHENOBARBITAL AND VERONAL
Autor: William B. Cowden, Noel W. Jacobsen
Publikováno v: Chemischer Informationsdienst. 13
5-Ethyl-1,3-dihydroxy-5-phenylbarbituric acid (N, N′-dihydroxyphenobarbital) and 5,5-diethyl-1,3- dihydroxybarbituric acid (N, N′-dihydroxyveronal) have been prepared by the condensation of 1,3-dibenzyloxyurea with ethylphenylmalonyl dichloride a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2325c9334a8508e3dec3c74a68754f3a
https://doi.org/10.1002/chin.198235242
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7
ChemInform Abstract: THE HYDRAZINOLYSIS OF HETEROCYCLIC COMPOUNDS. IV. 4-HYDROXY-1,6,7-TRIMETHYLPTERIDINE-2(1H)-THIONE
Autor: Ronald G. Dickinson, Noel W. Jacobsen
Publikováno v: Chemischer Informationsdienst. 7
4-Hydroxy-l, 6, 7-trimethylpteridine-2(1H)-thione reacts with hydrazine to yield 4-amino-5-hydrazino-1, 2, 4-triazole-3-thiol and 2-hydrazino-1, 6, 7-trimethylpteridin-4(1H)-one which is subsequently transformed to 2, 2'-hydrazobis[l, 6, 7-trimethylp
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7c08c418afe5bfd9165fb36751e38bb0
https://doi.org/10.1002/chin.197622127
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9
Pyrimidine N-oxides. V. Ionization constants of N-hydroxybarbiturates
Autor: Hans Stünzi, William B. Cowden, Noel W. Jacobsen
Publikováno v: Australian Journal of Chemistry. 35:1251
The ionization constants, pKa, of a number of N-hydroxy 5-substituted barbituric acids and their O-and N-alkylated derivatives are reported. For practical comparisons under physiological conditions, pKa values were also determined at I 0.15 M KNO3 an
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::774bc5c36829cf6e83eb1337e13dd22c
https://doi.org/10.1071/ch9821251
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10
N-Aminopyrimidines. The Synthesis and Reactions of 1-Aminobarbituric Acids
Autor: Noel W. Jacobsen, Bruce L. McCarthy
Publikováno v: Australian Journal of Chemistry. 32:153
A general synthesis of 1-aminobarbituric acid, 1-amino-2-thiobarbituric acid and their 5-alkyl derivatives is described together with reactions and properties which confirm their structure.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::280a720441a7f633b0c6aa4bd0a6f1e5
https://doi.org/10.1071/ch9790153
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