Zobrazeno 1 - 10
of 79
pro vyhledávání: '"Jerzy T. Wróbel"'
Publikováno v:
Magnetic Resonance in Chemistry. 38:707-718
Several Lythraceae alkaloids containing either a trans-fused (decinine, decodine, decaline) or a cis-fused (decamine, verticillatine, vertaline) quinolizidine ring system were examined by high-field NMR spectroscopy. One- and two-dimensional NMR tech
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b09f38dc750643da259b4f3477f0702c
https://doi.org/10.1002/1097-458x(200009)38:9<707::aid-mrc688>3.0.co
https://doi.org/10.1002/1097-458x(200009)38:9<707::aid-mrc688>3.0.co
Publikováno v:
Rapid Communications in Mass Spectrometry. 7:288-292
A new group of thio-C30 nuphar alkaloids has been obtained from the three main stereoisomers by complete oxidation of the sulphur and both the tertiary nitrogen sites. High-resolution mass spectrometry and metastable-ion decomposition analysis were u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ae065c2e8e4580062fd82c585bbd7118
https://doi.org/10.1002/rcm.1290070406
https://doi.org/10.1002/rcm.1290070406
Publikováno v:
ChemInform. 23
A general route to some 1-ethoxycarbonylquinolizinium bromides has been worked out. The method allows to conduct the condensation between β-ketoenol ethers and substituted 2-pyridylacetates in homogenous conditions in the presence of trifluoroacetic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::607bc8463267771a7856c5b2d2f612eb
https://doi.org/10.1002/chin.199236182
https://doi.org/10.1002/chin.199236182
Publikováno v:
Journal of Crystallographic and Spectroscopic Research. 22:329-339
The crystal structures of two quaternary salts,trans,trans- andcis,trans-N,N′-dimethylthiobinupharidine diiodide, whose stereochemistries have been previously characterized by13C NMR spectroscopy, have now been determined by X-ray analysis. Differe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d1775d3a3a49967f264fe430d0990533
https://doi.org/10.1007/bf01199536
https://doi.org/10.1007/bf01199536
Publikováno v:
Collection of Czechoslovak Chemical Communications. 57:1072-1080
A general route to some 1-ethoxycarbonylquinolizinium bromides has been worked out. The method allows to conduct the condensation between β-ketoenol ethers and substituted 2-pyridylacetates in homogenous conditions in the presence of trifluoroacetic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2ba8cdb41394a595b45736d20c88fa9
https://doi.org/10.1135/cccc19921072
https://doi.org/10.1135/cccc19921072
Publikováno v:
Rapid Communications in Mass Spectrometry. 5:518-523
This paper summarizes the data obtained during the last 20 years on the mass spectrometric behaviour of C15 and thio−C30 nuphar alkaloids. The usefulness of this technique in the solution of stereochemical problems is confirmed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::58d152ad3d84059ff8e25f406f3b5981
https://doi.org/10.1002/rcm.1290051107
https://doi.org/10.1002/rcm.1290051107
Publikováno v:
Organic Mass Spectrometry. 26:956-960
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d71ffe9653676b76177a445ad1e1674e
https://doi.org/10.1002/oms.1210261108
https://doi.org/10.1002/oms.1210261108
Publikováno v:
Collection of Czechoslovak Chemical Communications. 56:1147-1150
Coupling of eugenol (I) and isoeugenol (II) by means of horseradish peroxidase and hydrogen peroxide resulted in ~20% yield of dimeric compounds: 5,5’-diallyl-2,2’-dihydroxy-3,3’-dimethoxy-biphenyl (III) and 2-(4’-hydroxy-3’-methoxy)phenyl-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3011820c2ea810b6ca8111122e4ce98e
https://doi.org/10.1135/cccc19911147
https://doi.org/10.1135/cccc19911147
Publikováno v:
Advances in experimental medicine and biology. 527
Pantropical plant Catharanthus roseus (L) G. Don is known as a source of valuable bisindole alkaloids: vinblastine (VBL) and vincristine (VCR), oncolytics widely used as sulfates in therapy of malignant diseases. They are biosynthesized in the plant
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::bf17e2067ecd4d2a6fbd86125d07fbe4
https://pubmed.ncbi.nlm.nih.gov/15206784
https://pubmed.ncbi.nlm.nih.gov/15206784
Autor:
Joanna, Ruszkowska, Jerzy T, Wróbel
Publikováno v:
Advances in experimental medicine and biology. 527
Phytoalexins are low molecular weight antimicrobial compounds that are synthesized and accumulated in plants after their exposure to pathogenic microorganisms (bacteria, fungi, viruses and protozoans). They are extensively studied now as promising an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::f3769987eb016d734f1e8c9ccdd327bf
https://pubmed.ncbi.nlm.nih.gov/15206782
https://pubmed.ncbi.nlm.nih.gov/15206782