منابع مشابه
The carbon-13 NMR spectrum of gougerotin.
Gougerotin was isolated from Streptomyces gougerotii in 1962", its structure was established in 19692' and total syntheses were announced in 1972" and in 19754'. In the course of a soil screen we isolated gougerotin from an organism identified as Streptom}ices puniceus subsp. doliceus subsp. nov. (NRRL 11160). It was co-produced with the clazamycins''". The ultraviolet'' and proton magnetic res...
متن کاملChemistry of bleomycin. XVIII. carbon-13 NMR studies.
During chemical studies of bleomycin, many fragments and derivatives have been isolated and characterized. The 13C-NMR spectra of these compounds were taken and analyzed for structural information, and the complete assignment of the spectra was achieved. The 13C-chemical shift map thus obtained contains information about the structure and conformation and will be useful for studies on the chemi...
متن کاملA CARBON - 13 NMR INVESTIGATION OF THE CHEMICAL COMPOSITION OF COAL DERIVED LIQUIDS Ronald
The recen t increased importance o f coa l as an energy source has d i c t a t e d t h a t I more knowledge be ob ta ined about the bas i c molecular p r o p e r t i e s o f t h e s o l i d and i t s conversion p r o p e r t i e s . has been employed on a l i m i t e d bas i s f o r t h e ana lys i s o f coal de r i ved l i q u i d s as w e l l as pet ro leum samples. Extens ive C-13 NMR work h...
متن کاملNear-silence of isothiocyanate carbon in (13)C NMR spectra: a case study of allyl isothiocyanate.
(1)H and (13)C NMR spectra of allyl isothiocyanate (AITC) were measured, and the exchange dynamics were studied to explain the near-silence of the ITC carbon in (13)C NMR spectra. The dihedral angles α = ∠(C1-C2-C3-N4) and β = ∠(C2-C3-N4-C5) describe the conformational dynamics (conformation change), and the bond angles γ = ∠(C3-N4-C5) and ε = ∠(N4-C5-S6) dominate the molecular dynamics (confor...
متن کاملUtilization of an Escherichia coli mutant for carbon-13 enrichment of tRNA for NMR studies.
The enrichment of tRNA at specific sites with carbon-13 has been accomplished in vivo using a mutant of Escherichia coli. A relaxed strain of E. coli auxotrophic for methionine was grown in a specifically defined medium supplemented with either [14C] or [13C]-methyl labeled methionine. Cells were collected at the end of the log-phase of growth and tRNA was extracted. Analysis of the radioactivi...
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1978
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.26.2894