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1.
Greenblatt HM Guillou C Guénard D Argaman A Botti S Badet B Thal C Silman I Sussman JL 《Journal of the American Chemical Society》2004,126(47):15405-15411
Bifunctional derivatives of the alkaloid galanthamine, designed to interact with both the active site of the enzyme acetylcholinesterase (AChE) and its peripheral cation binding site, have been assayed with Torpedo californica AChE (TcAChE), and the three-dimensional structures of their complexes with the enzyme have been solved by X-ray crystallography. Differences were noted between the IC(50) values obtained for TcAChE and those for Electrophorus electricus AChE. These differences are ascribed to sequence differences in one or two residues lining the active-site gorge of the enzyme. The binding of one of the inhibitors disrupts the native conformation of one wall of the gorge, formed by the loop Trp279-Phe290. It is proposed that flexibility of this loop may permit the binding of inhibitors such as galanthamine, which are too bulky to penetrate the narrow neck of the gorge formed by Tyr121 and Phe330 as seen in the crystal structure. 相似文献
2.
P. Forgacs J. Provost A. Touche D. Guenard C. Thal J. Guilhem 《Tetrahedron letters》1985,26(29):3457-3460
From the trunk bark of Odyendea gabonensis (Pierre) Engl. Simaroubaceae, two-new quassinoids have been isolated : Odyendane and Odyendene. Their structures were established from spectral data and X-Ray diffraction analysis. 相似文献
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Pummerer's ketone 1 is obtained with an overall yield of 55 % by the following sequence: Claisen rearrangement of an arylcyclohexylether 3; allylic oxidation of the methylcycloalkylphenolic derivative 4b, then spontaneous cyclisation during demethylation to give 2. 1 is obtained by dehydrogenation of 2. NMR data agree with a cis stereochemistry at C4a and C 9b. 相似文献
4.
Guillou C Beunard JL Gras E Thal C 《Angewandte Chemie (International ed. in English)》2001,40(24):4745-4746
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A synthesis of the dibenz[b,d]azonine atropisomers (14) from 2-phenylbenzoic acid is described. This heterocycle belongs to a new series of biaryl compounds with potential antitubulin activity. 相似文献
6.
Albert Fernau und R. Thal 《Fresenius' Journal of Analytical Chemistry》1911,50(8):526-528
Ohne Zusammenfassung 相似文献
7.
Ahmed Bdoui Joëlle Mayrargue Henri Moskowitz Claude Thal 《Journal of heterocyclic chemistry》1992,29(2):547-550
A stereoselective synthesis of unknown spirobenzodihydropyrancyclohexanes is described starting from arylcyclohexenes alkylated and cyclized via a coumarin intermediate and leading to new amino derivatives which are rigid analogs of dopamine. 相似文献
8.
The classical procedure of formylation of ketones is reinvestigated in order to provide a synthetic route to unsymmetrical biaryls from cyclohexenones. 相似文献
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10.
The photocyclization of 2-(3-indolyl)-3-(3-pyridyl)propenenitrile yields pyrido[a]carbazoles which represent intermediates to the original pentacyclic skeletons; the new indolopyridoquinoxaline 8 constitutes a structural analog of the alkaloid eburnamonin. 相似文献