Zobrazeno 1 - 10
of 126
pro vyhledávání: '"Jean Claude Gramain"'
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 109:325-331
Benzophenone is photoreduced by amides and lactams. The hydrogen atom α to the nitrogen atom is abstracted regioselectively; coupling of the two resulting radicals leads to adducts with a 1-phenylethanolamide structure. The use of this general react
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c3900fd549eea52d643b746b719a5d8
https://doi.org/10.1002/recl.19901090503
https://doi.org/10.1002/recl.19901090503
Publikováno v:
Journal of Heterocyclic Chemistry. 39:965-973
Tricyclic keto-indoles were synthesized by photocyclization of easily obtained enaminones in an electro-cyclic photochemical reaction. The three methods reported were chosen according to the enaminone structure. The most general procedure using one-s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4dfdf8775047caa09ecef14c3b1188ea
https://doi.org/10.1002/jhet.5570390517
https://doi.org/10.1002/jhet.5570390517
Autor:
Daniel Gardette, Jean Claude Gramain, M. Madesclaire, Eliane Duroux, Danielle Vallee-Goyet, Pascal Coudert, Fernand Leal, Marc Bria, Jacques Couquelet, Valérie Weber, Eliane Albuisson, Catherine Rubat
Publikováno v:
Bioorganic & Medicinal Chemistry. 10:1647-1658
In order to study the effect of phenol moieties on biological activities of ascorbic acid derivatives, we synthesized 13 novel 4,5-diaryl-3-hydroxy-2(5H)-furanones 5a-m with various substitution patterns. Compound 5 g bearing a 2,3-dihydroxy phenyl r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f808ab58500372a1ad40de0f846d59a2
https://doi.org/10.1016/s0968-0896(02)00053-6
https://doi.org/10.1016/s0968-0896(02)00053-6
Publikováno v:
Tetrahedron Letters. 41:8769-8772
(S)-(+)-Pipecoline and both enantiomers of coniine were synthesized, in good yields, by a reductive photocyclization of chiral dienamides. Enantioselectivities of up to 75% were obtained.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af5dd4dfcde9f0ef54d077af1b40b6d3
https://doi.org/10.1016/s0040-4039(00)01549-5
https://doi.org/10.1016/s0040-4039(00)01549-5
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
Autor:
Jean-Claude Teulade, Veronique Benezech, Mohammed Hichour, Yves Blache, Jean-Pierre Chapat, Marie-Eve Sinibaldi-Troin, Olivier Chavignon, Jean-Claude Gramain
Publikováno v:
Tetrahedron. 55:1959-1970
The synthesis of 6,7,8,9-tetrahydro-5H-pyrido[2,3-b]indol-9-ones from arylenaminones is described. Two “routes” have been investigated: a radical process through a photochemical reaction, and a catalytic process through an arylpalladium complex.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f5890732ecd5c0dc542db5e858b8e07
https://doi.org/10.1016/s0040-4020(98)01212-5
https://doi.org/10.1016/s0040-4020(98)01212-5
Asymmetric synthesis of quinolizidine alkaloids (−)-lasubine I, (−)-lasubine II and (+)-subcosine II
Publikováno v:
Tetrahedron: Asymmetry. 9:4361-4368
The enantioselective synthesis of (−)-lasubine I 1 and the first asymmetric synthesis of (−)-lasubine II 2 and (+)-subcosine II 3 is described. The key step is the intramolecular cyclization of N-acyliminium ion 4 which is derived from (S)-aminoe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a009ef0d3fef82486ab859425c9177b
https://doi.org/10.1016/s0957-4166(98)00468-6
https://doi.org/10.1016/s0957-4166(98)00468-6
Publikováno v:
Synthetic Communications. 28:4257-4272
A general method for the synthesis of N,N-dialkylaminobutylamines 4 from readily available chloroacetamides 6 is described.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::363ec6bbe97fdc10aabd52a28f649ee5
https://doi.org/10.1080/00397919809458707
https://doi.org/10.1080/00397919809458707
Publikováno v:
Tetrahedron: Asymmetry. 9:1823-1828
The enantioselective synthesis of (+)-myrtine 1 and (−)-epimyrtine 2 is described starting from ( S )-2-(2-hydroxypropyl)allyltrimethylsilane 4 using an intramolecular allylsilane N -acyliminium ion cyclization.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da38153a278ebf9c1d4bbabe5bbf2fa9
https://doi.org/10.1016/s0957-4166(98)00170-0
https://doi.org/10.1016/s0957-4166(98)00170-0
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 1. :2145-2150
The reactivity of hexahydrocarbazolones 3 and 7 in Michael reactions has been studied with several reagents: treatment with acrylonitrile, methyl acrylate and the Mannich base of methyl vinyl ketone leads to 4a-substituted compounds 13–16 in good y
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e97add41ba39bb0d104114fc6c610877
https://doi.org/10.1039/a802620c
https://doi.org/10.1039/a802620c