ZIB

Electronic Resource

The Biosynthesis of Alkaloids IIPart I of this review appeared in Angew. Chem. Internet. Edit. 2, 341 (1963). (1963)

Mothes, K. ; Schütte, H. R.

Weinheim : Wiley-Blackwell

Angewandte Chemie International Edition in English 2 (1963), S. 441-458

add to mindlist on the mindlist

Details

ISSN: 0570-0833

Keywords: Biosynthesis ; Alkaloids ; Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/anie.196304411

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Permethylation of Oligomeric and Polymeric Carbohydrates and Quantitative Analysis of the Cleavage Products (1963)

Wallenfels, K. ; Bechtler, G. ; Kuhn, Richard ; [et al.]

Weinheim : Wiley-Blackwell

Angewandte Chemie International Edition in English 2 (1963), S. 515-523

add to mindlist on the mindlist

Details

ISSN: 0570-0833

Keywords: Permethylation ; Carbohydrates ; Methylation ; Gas chromatography ; Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: Methylation of mono-, oligo-, and polysaccharides with methyl iodide/barium oxide or dimethyl sulfate/barium hydroxide in dimethyl sulfoxide as solvent rapidly leads to high degrees of methylation. Depending on the structure and solubility of the substrate, permethylation can be achieved either in one operation or by repetition of the same treatment. Procedures of permethylation of various carbohydrates are given. The methyl glycosides obtained on methanolysis can be separated and determined quantitatively by gas chromatography. The preparation of separating columns with minimum retention for this purpose is described. Pullulan was shown to have the structure of a completely linear polymer of maltotriose units connected by α-1→6-linkages. - In addition the gaschromatographic identification of methyl ethers of glucosamine and galactosamine is reported.

Additional Material: 15 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/anie.196305151

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Modern Methods for the Separation and Continuous Measurement in the Gas Phase of Compounds Labelled with Radiocarbon. Radio and Reaction Gas ChromatographyAlso Part VI of the series on Reaction Gas Chromatography. Part V: F. Drawert and G . Kupfer, Hoppe-Seylers Z . physiol. Chem. 329, 90 (1962). (1963)

Drawert, F. ; Bachmann, O.

Weinheim : Wiley-Blackwell

Angewandte Chemie International Edition in English 2 (1963), S. 540-545

add to mindlist on the mindlist

Details

ISSN: 0570-0833

Keywords: Radiocarbon ; Gas chromatography ; Trace analysis ; Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: In biochemical work with isotopic tracers, it is frequently advantageous to investigate samples in the gas phase. In this way, the selectivity of gas-chromatographic separating columns and the sensitivity of detectors can be utilized for both the detection of gas-chromatographic fractions and the determination of their radioactive portions. Conversion of materials separated by gas chromatography into a single standard chemical compound prior to measurement of the radioactivity is recommended. Methods suitable for 14C-labelled compounds can also be applied to those labelled with 3H or 35S.

Additional Material: 8 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/anie.196305401

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

Gas Chromatographic Investigation of Racemization during Peptide SynthesisPresented in brief at the Fifth European Peptide Symposium in Oxford, England, in September, 1962.Respectfully dedicated to Prof. Dr. Adolf Butenandt on the occasion of his 60th birthday (1963)

Weygand, F. ; Prox, A. ; Schmidhammer, L. ; [et al.]

Weinheim : Wiley-Blackwell

Angewandte Chemie International Edition in English 2 (1963), S. 183-188

add to mindlist on the mindlist

Details

ISSN: 0570-0833

Keywords: Racemization ; Peptide synthesis ; Gas chromatography ; Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: It is shown that the methyl esters of many diastereoisomeric N-trifluoroacetyldipeptides can be separated by gas chromatography on Golay columns. This makes it possible for the first time to carry out accurate quantitative investigations of recemization occurring during peptide synthesis without resort to measurements of optical rotation or enzymatic cleavage, and witout having to isolate the peptides. Some well-known methods of forming peptides were examined using the synthesis of the methyl ester of carbobenzoxy-L-valyl-L-valine as an example. The synthesis of the methyl ester of N-trifluoroacetyl-L-valyl-L-valine was investigated as a model for the linking of peptides. The influence on racemization of numerous factors was determined. General conclusions could be drawn regarding peptide synthesis.

Additional Material: 3 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/anie.196301831

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

The Biogenesis of Ergot AlkaloidsDedicated to Professor Hans von Euler on the occasion of his 90th birthday (1963)

Weygand, F. ; Floss, H.-G.

Weinheim : Wiley-Blackwell

Angewandte Chemie International Edition in English 2 (1963), S. 243-247

add to mindlist on the mindlist

Details

ISSN: 0570-0833

Keywords: Ergot alkaloids ; Alkaloids ; Biosynthesis ; Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Notes: In this article the biogenesis of the ergoline ring in lysergic acid derivatives and the clavines is discussed. T·yptophan and mevalonic acid are the precursors. The N-methyl group is supplied by formate or methionine. Concepts and results dealing with the manner in which the compounds are formed are discussed. Finally, the known biogenetic relationships among the ergot alkaloids are discussed in connection with their biogenesis.

Additional Material: 1 Tab.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/anie.196302431

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

The Biosynthesis of Alkaloids IPart II of this review will appear in a subsequent issue of this journal.Dedicated to Professor Dr. Adolf Butenandt on the occasion of his 60th birthday (1963)

Mothes, K. ; Schütte, H. R.

Weinheim : Wiley-Blackwell

Angewandte Chemie International Edition in English 2 (1963), S. 341-357

add to mindlist on the mindlist

Details

ISSN: 0570-0833

Keywords: Biosynthesis ; Alkaloids ; Chemistry ; General Chemistry

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/anie.196303411

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

hits 1 - 6 | 6 hits