Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Michel Barrelle"'
Publikováno v:
Tetrahedron: Asymmetry. 7:1961-1966
The title compound was found to be useful as a chiral derivating agent in 19 F NMR spectroscopy, to determine the enantiomeric purity of 2,2′-dihydroxybinaphtyl and its monoether derivatives. The configurations of ether derivatives are easily deduc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ca5335c9c986d8af7fc1194b4b08569
https://doi.org/10.1016/0957-4166(96)00236-4
https://doi.org/10.1016/0957-4166(96)00236-4
Autor:
Michel Barrelle
Publikováno v:
Journal of Wood Chemistry and Technology. 15:179-188
Derivatization of lignins samples by p-fluorobenzyl groups (etherification of phenolic groups) leads to the distinction between G and G-S-lignin, and to analyze approximately the G/S ratio and the (α −C=O) content of the studied samples by integra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e404d08273657f584a1b11ad75772a64
https://doi.org/10.1080/02773819508009506
https://doi.org/10.1080/02773819508009506
Autor:
Michel Barrelle
Publikováno v:
hfsg. 47:261-267
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a24881ca2db905ca7e0815241ee40b6
https://doi.org/10.1515/hfsg.1993.47.3.261
https://doi.org/10.1515/hfsg.1993.47.3.261
Publikováno v:
Journal of Wood Chemistry and Technology. 12:413-424
Derivatization of an oxidized lignin sample by suitable fluoroaromatic compounds is described. Integration of the 19F NMR spectra of the derivatives allows the determination of the carboxyl content of the sample. Three reagents were investigated : 4-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::910582968bafcaea5bf3a05c6626a9f7
https://doi.org/10.1080/02773819208545789
https://doi.org/10.1080/02773819208545789
Autor:
Sylvain Hamman, Michel Barrelle
Publikováno v:
Magnetic Resonance in Chemistry. 29:759-761
The use of 2-fluoro-2-phenylacetic acid as a chiral derivatizing agent allowed the distinction, by means of fluorine NMR spectroscopy, of enantiomers of alcohols L1CH(OH)L2 converted into the diastereoisomeric esters PhCHFCO2CHL1L2. The δF(RR) and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e81e8a82ca0118724b0d4b464a04716
https://doi.org/10.1002/mrc.1260290803
https://doi.org/10.1002/mrc.1260290803
Autor:
Michel Barrelle, Marcel Apparu
Publikováno v:
Tetrahedron Letters. 17:2611-2614
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::19f81ed04ab2d6766d40071a6ef791c6
https://doi.org/10.1016/s0040-4039(00)91747-7
https://doi.org/10.1016/s0040-4039(00)91747-7
Publikováno v:
Journal of Fluorine Chemistry. 37:85-94
2-Fluoro-2-phenyl acetic acid was synthetized from phenylglycine through a fluorodeamination reaction in a HF : pyridine mixture or from ethylmandelate through fluorodehydroxylation using the reagent fluoroamine (FAR). The specific rotation of S-2-fl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ed3792841963693202239ba8aa76ce2
https://doi.org/10.1016/s0022-1139(00)83089-4
https://doi.org/10.1016/s0022-1139(00)83089-4
Autor:
Jean Pelmont, Anastase Dardas, Dominique Gal, Ginette Sauret-Ignazi, Michel Barrelle, Raja Sterjiades
Publikováno v:
Archives of Biochemistry and Biophysics. 236:585-592
Spectroscopic studies were carried with a cytochrome P-450 in Moraxella sp., strain GU2, that could grow on guaiacol or 2-ethoxyphenol as the sole source of carbon and energy. The dissociation constant of the guaiacol-cytochrome complex was estimated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5af08dd1b9c179703ac89e81eeb2b8ea
https://doi.org/10.1016/0003-9861(85)90662-9
https://doi.org/10.1016/0003-9861(85)90662-9
Publikováno v:
Holzforschung. 43:339-343
The stereochemical pathway of the hybride reductions of lignin model compounds (ketoalcohols and ketoesters) was studied in different conditions to obtain a complete information on the erythro/threo ratios, during synthesis of guaiacylglycerol-guaiac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e18aaa53e810d9e71cfe0d22e0a32d44
https://doi.org/10.1515/hfsg.1989.43.5.339
https://doi.org/10.1515/hfsg.1989.43.5.339
Publikováno v:
Organic Magnetic Resonance. 19:102-104
The 13C NMR spectra of several oligo(oxyethylene) glycols and of their derivatives obtained from oxidative cleavage were studied. Assignments are proposed and the 13C chemical shifts recalculated from sets of parameters obtained for the substituents
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5e4877aceedb9b9f031860d140ed1eb
https://doi.org/10.1002/mrc.1270190212
https://doi.org/10.1002/mrc.1270190212