Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Annemarie Cronjé"'
Autor:
Barend C. B. Bezuidenhoudt, Petrus J. Steynberg, E. Vincent Brandt, Daneel Ferreira, Jan P. Steynberg, Annemarie Cronjé
Publikováno v:
Tetrahedron. 53:2591-2598
The hepta-O-methyl ethers 3 and 4 of procyanidin A-1 1 and A-2 2 are subject to facile cleavage of the acetal functionality with sodium cyanoboranuide in trifluoroacetic acid at 0°C. This straight forward chemical method permits the unambiguous esta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc7789886150efbba9764de6daef5634
https://doi.org/10.1016/s0040-4020(96)01149-0
https://doi.org/10.1016/s0040-4020(96)01149-0
Publikováno v:
J. Chem. Soc., Perkin Trans. 1. :2467-2477
Structural examination of the phenolic metabolites of commercially used wattle bark extract reveals the presence of a range of novel flavanoids comprising (–)-epirobinetinidol 1, the first C-methyl proanthocyanidin, (–)-fisetinidol-(4α,8)-6-meth
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d73a2c129bc52472b4b5d76056e08df
https://doi.org/10.1039/p19930002467
https://doi.org/10.1039/p19930002467
Publikováno v:
Tetrahedron Letters. 31:3789-3792
— Proanthocyanidins of the A—type exhibit identical 1 H NMR coupling constants (J 3,4 = 3.5 Hz) irrespective of the relative configurations of their C-rings. The selective 1 H NOE association of 3—H (C-ring) to either 6—H(D) or 8—H(A) permi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f85e9415b7dd769dc223aa235c86770
https://doi.org/10.1016/s0040-4039(00)97472-0
https://doi.org/10.1016/s0040-4039(00)97472-0
Autor:
Johann F. W. Burger, Desmond A. Young, Johannes C. S. Malan, Jan P. Steynberg, Daneel Ferreira, Susan L. Bonnet, Annemarie Cronjé
Publikováno v:
Phytochemistry. 29:2979-2989
Several members of the class of natural ‘phlobaphene’ condensed tannins, representing the products of C-ring isomerization of (−)-fisetinidol-(4α,8) and (4β,8)-(−)-epicatechin profisetinidins have been characterized. These comprise four fun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4eaa8bd48f1152a545f9236888f460a7
https://doi.org/10.1016/0031-9422(90)87119-f
https://doi.org/10.1016/0031-9422(90)87119-f
Autor:
Desmond A. Young, Daneel Ferreira, Jan P. Steynberg, Johann F. W. Burger, Johannes C. S. Malan, Annemarie Cronjé
Publikováno v:
Phytochemistry. 29:275-277
The natural occurrence of the first profisetinidins associated with (−)-epicatechin is demonstrated in the heartwood of three legumes. 1 H NMR spectroscopy at 300 MHz permits assessment of the relative abundance of the predominant rotamers in each
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9163b452cc27410a1360b52adb615bf1
https://doi.org/10.1016/0031-9422(90)89049-f
https://doi.org/10.1016/0031-9422(90)89049-f
Autor:
Desmond A. Young, Annemarie Cronjé, Adrienne L. Botes, Daneel Ferreira, David G. Roux, Goverdhan Mehta, Duvvuri Subrahmanyam, Patrick D. Bailey, Robert D. Wilson, George R. Brown, Shinichi Itsuno, Hiromitsu Yanaka, Chiharu Hachisuka, Koichi Ito
Publikováno v:
J. Chem. Soc., Perkin Trans. 1. :2289-2290
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be3f1fc2457d30edec16c58518a6a521
https://doi.org/10.1039/p19910002289
https://doi.org/10.1039/p19910002289
Publikováno v:
J. Chem. Soc., Perkin Trans. 1. :2521-2527
Free-phenolic [4,6]- and [4,8]-2,3-trans-(–)-fisetinidol-(+)-catechin diastereoisomers of both 3,4-trans and 3,4-cis configuration, which serve as synthons for higher oligomers, are available in improved yields from direct condensation, and also vi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::509b1327a1d1ea707b3970db88ca4f58
https://doi.org/10.1039/p19850002521
https://doi.org/10.1039/p19850002521