Zobrazeno 1 - 10
of 92
pro vyhledávání: '"J. P. Celerier"'
Autor:
J. P. Celerier, Christian Bellec, Jean-Claude Gramain, D. Gardette, Gjergj Haviari, Marie-Claude Fargeau-Bellassoued, Jerome Blot, Olivier David, Gérard Lhommet
Publikováno v:
The Journal of Organic Chemistry. 64:3122-3131
Various chiral pyrrolidine tetrasubstituted beta-enamino esters were reduced catalytically or chemically with good to moderate diastereoselectivity owing to a chiral induction originated from (S)-alpha-methylbenzylamine. With endocyclic double bond c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9aba5300a684f7b5f140ee2e4317c6ba
https://doi.org/10.1021/jo982169p
https://doi.org/10.1021/jo982169p
Publikováno v:
Tetrahedron Letters. 39:5189-5192
The highly diastereoselective synthesis of the indolizidine alkaloid (−) 209B is described via the diastereoselective alkylation of a chiral cyclic β-amino ester prepared from (R)-methylbenzylamine.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::550db7a014bdd8776124add1584c0500
https://doi.org/10.1016/s0040-4039(98)01040-5
https://doi.org/10.1016/s0040-4039(98)01040-5
Publikováno v:
Journal of Heterocyclic Chemistry. 35:371-376
Cis-3 and 3,5-substituted pyrrolizidines can be prepared from β-enaminolactones. Substituted pyrrolidinoketones lead to these compounds by an amino reductive annelation with a low diastereomeric excess, but a best access to these azabicycles consist
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6182a696a8ae0316e8df76057dc90167
https://doi.org/10.1002/jhet.5570350219
https://doi.org/10.1002/jhet.5570350219
Publikováno v:
Tetrahedron Letters. 38:8507-8510
Chiral cyclic β-amino esters can be enantiospecifically prepared by a kinetically controled alkylation of the ester function of β-amino esters.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::82c241d7d3e4e09bbb155e8fa110c14c
https://doi.org/10.1016/s0040-4039(97)10300-8
https://doi.org/10.1016/s0040-4039(97)10300-8
Autor:
Jean-Claude Gramain, Christian Bellec, J. P. Celerier, D. Gardette, A. Bardou, Gérard Lhommet, Marie-Claude Fargeau-Bellassoued, Jerome Blot
Publikováno v:
Tetrahedron Letters. 38:8511-8514
Catalytic and chemical reductions of chiral pyrrolidine β-enamino esters provides corresponding β-amino esters with good to moderate diastereomer excesses. The unexpected major diastereomer 5 comes from a reduction process which amounts to an anti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15bc7882d6c5002f05def0f25bd3cd06
https://doi.org/10.1016/s0040-4039(97)10301-x
https://doi.org/10.1016/s0040-4039(97)10301-x
Autor:
Martine Bonin, Henri-Philippe Husson, Gérard Lhommet, Vu Moc Thuy, J. P. Celerier, Stéphanie Fréville, Jean-Charles Quirion
Publikováno v:
Tetrahedron. 53:8447-8456
(+) and (−) trans-2,6-dimethylpiperidines 9 have been prepared from diastereomeric lactams 6 and 11, both available from (R)-(−)-phenylglycinol 4. Diastereoselective C-2 alkylation afforded oxazolidines 7 and 12. Reduction of 7 with LiAlH4 or NaB
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b272e2d07cfe8823bbf501da69d47f83
https://doi.org/10.1016/s0040-4020(97)00525-5
https://doi.org/10.1016/s0040-4020(97)00525-5
Publikováno v:
Synthetic Communications. 26:3897-3901
The condensation of Grignard reagents with succinic or glutaric anhydrides in presence of a catalytic amount of CuI is a good way for the preparation of 4- or 5-oxoacids.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::69d5c1f0b3cc8192bad737846699d647
https://doi.org/10.1080/00397919608003809
https://doi.org/10.1080/00397919608003809
Publikováno v:
Tetrahedron: Asymmetry. 6:2651-2654
A versatile and highly enantioselective approach to 2-substituted piperidines is described using phenylglycinol as chiral auxiliary.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b58dd62e0498fb03843ec3c39badb2b
https://doi.org/10.1016/0957-4166(95)00348-s
https://doi.org/10.1016/0957-4166(95)00348-s
Publikováno v:
Journal of Heterocyclic Chemistry. 32:255-258
A diastereoselective, general and versatile access to disubstituted indolizidines is described. The nmr conformational analysis permits us to establish preferred conformations.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::15929e5d8d2b77e9e13c713f40c41960
https://doi.org/10.1002/jhet.5570320143
https://doi.org/10.1002/jhet.5570320143
Publikováno v:
Tetrahedron Letters. 42:5397-5399
Chiral heterocyclic β-amino esters can be easily transformed into bicyclic alkaloids after a diastereoselective alkylation followed by specific chemical transformations.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe282c325ea49aab46946b2e061e10aa
https://doi.org/10.1016/s0040-4039(01)00977-7
https://doi.org/10.1016/s0040-4039(01)00977-7