Zobrazeno 1 - 10
of 102
pro vyhledávání: '"James L. Charlton"'
Publikováno v:
Canadian Journal of Chemistry. 78:553-561
A practical method for large scale synthesis of 1-arylnaphthalene and 1-aryl-1,2-dihydronaphthalene lignans is described. The method makes use of the classic Stobbe condensation followed by regioselective reactions that provide access to both the com
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8613de0dd6e69ee43bfbd67fd25f47d3
https://doi.org/10.1139/v00-059
https://doi.org/10.1139/v00-059
Publikováno v:
Journal of the American Oil Chemists' Society. 76:757-764
Structural changes of sinapic acid were induced by air oxidation in aqueous solutions at pH 7–10 and followed by spectral and high-performance liquid chromatographic (HPLC) analysis. Color properties of the sinapic acid solutions were determined by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8013d028b30d17cab2b6ffa883bc4165
https://doi.org/10.1007/s11746-999-0172-6
https://doi.org/10.1007/s11746-999-0172-6
Publikováno v:
Journal of the American Oil Chemists' Society. 76:433-441
Structural changes in sinapic acid during autoclaving were studied using spectral analysis, thin-layer chromatography, high-performance liquid chromatography, nuclear magnetic resonance (NMR), and mass spectroscopy. Color properties of sinapic acid a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8728719e95c936a104ce654a58215e3c
https://doi.org/10.1007/s11746-999-0021-7
https://doi.org/10.1007/s11746-999-0021-7
Autor:
James L. Charlton, David E. Bogucki
Publikováno v:
Canadian Journal of Chemistry. 75:1783-1794
The synthesis of (S)-(−)-rosmarinic acid (30) in 9% overall yield is described. The synthesis was achieved by a convergent route in which 3-(3′,4′-dihydroxyphenyl)-(S)-lactic acid (23) and caffeic acid (25), both appropriately protected, were c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8ef215e8aae23ff10454af2abae39d75
https://doi.org/10.1139/v97-612
https://doi.org/10.1139/v97-612
Autor:
James L. Charlton, Gaik-Lean Chee
Publikováno v:
Canadian Journal of Chemistry. 75:1076-1083
A simple procedure for the asymmetric synthesis of lignans via chiral β-benzyl-γ-butyrolactones has been developed. The key benzylbutyrolactone intermediates were efficiently synthesized using a six-step procedure, starting from 3,4-(methylenedioxy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bbf360820fefd8b9961bfe134dcf1d61
https://doi.org/10.1139/v97-127
https://doi.org/10.1139/v97-127
Publikováno v:
Journal of Agricultural and Food Chemistry. 44:1399-1402
Conditions which promote the alkaline conversion of sinapic acid (SA), the main phenolic acid in canola, to the lignan thomasidioic acid (TA) were investigated as the presence of TA could affect nutritional and functional properties of canola product
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::247d3895d66eef83a516e52a1759a94b
https://doi.org/10.1021/jf950431e
https://doi.org/10.1021/jf950431e
Autor:
Don M. Coltart, James L. Charlton
Publikováno v:
Canadian Journal of Chemistry. 74:88-94
The total asymmetric syntheses of (−)-isolariciresinol dimethyl ether (6) and (−)-deoxysikkimotoxin (7) have been carried out, in an attempt to exploit a synthetic strategy recently developed for the synthesis of (−)-deoxypodophyllotoxin (1, R1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::115a96af2b59997550b3d7d5b788c99d
https://doi.org/10.1139/v96-011
https://doi.org/10.1139/v96-011
Publikováno v:
Journal of the American Oil Chemists' Society. 72:1465-1470
Changes in sinapic acid when exposed to aqueous alkaline conditions were elucidated. Sinapic acid was exposed to a volatile buffer (pH 8.5) for 24 h, lyophilized, acidified, extracted, and characterized using nuclear magnetic resonance and mass spect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09153572d4db7d6c8bade004fbe8be65
https://doi.org/10.1007/bf02577839
https://doi.org/10.1007/bf02577839
Autor:
Vinh C. Pham, James L. Charlton
Publikováno v:
The Journal of Organic Chemistry. 60:8051-8055
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5c9cd541fe7637a258a9db2713421a2c
https://doi.org/10.1021/jo00129a053
https://doi.org/10.1021/jo00129a053
Publikováno v:
Canadian Journal of Chemistry. 73:1454-1462
A general method has been developed for the preparation of acetylenedicarboxylic acid esters and applied to the synthesis of both achiral and chiral esters. Diels–Alder reactions of one of the chiral esters, the bis(methyl (S)-lactyl) ester, with v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd6c575698130bcfb0d6a03cd14e1397
https://doi.org/10.1139/v95-180
https://doi.org/10.1139/v95-180