Preparation of 1-13C Enriched Benzonitrile, Mono-13C Enriched Benzene, and a Mixture of Mono-13C Enriched Benzonitriles.
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چکیده
منابع مشابه
Synthesis of highly 13C enriched carotenoids: access to carotenoids enriched with 13C at any position and combination of positions.
Carotenoids and their metabolites are essential factors for the maintenance of important life processes such as photosynthesis. Animals cannot synthesize carotenoids de novo, they must obtain them via their food. In order to make intensive animal husbandry possible and maintain human and animal health synthetic nature identical carotenoids are presently commercially available at the multi-tonne...
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Sir: Using 13C enriched precursors it has been elucidated recently1) that the aglycone of the leucomycins was derived from five acetates, one propionate, one butyrate and an unknown C2-unit corresponding to carbons-3 and -4. In the case of magnamycin which is C-9 oxidation product of leucomycin, previous studies using 14C labeled precursors2) suggested an acetate origin for carbons-3 and -4. An...
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Two robust combinations of spectral editing techniques with 2D (13)C-(13)C NMR have been developed for characterizing the aromatic components of (13)C-enriched low-temperature carbon materials. One method (exchange with protonated and nonprotonated spectral editing, EXPANSE) selects cross peaks of protonated and nearby nonprotonated carbons, while the other technique, dipolar-dephased double-qu...
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The (13)C-isotopomer enrichment of hepatic cytosolic acetyl-CoA of overnight-fed mice whose drinking water was supplemented with [U-(13)C]fructose, and [1-(13)C]glucose and p-amino benzoic acid (PABA) was quantified by (13)C NMR analysis of urinary N-acetyl-PABA. Four mice were given normal chow plus drinking water supplemented with 5% [1-(13)C]glucose, 2.5% [U-(13)C]fructose, and 2.5% fructose...
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We have studied the dynamics of the motion of a complex polysaccharide having seven sugar residues in the repeating subunit and which is a receptor for lectin interaction in the coaggregation of oral bacteria. Measurements of the longitudinal and the rotating frame relaxation rates and the heteronuclear nuclear Overhauser effects were carried out on a uniformly 13C-enriched sample using pulse s...
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ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1962
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.16-2318