Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Jean-Claude Jacquesy"'
Autor:
Agnès Martin-Mingot, Sébastien Thibaudeau, Jean-Claude Jacquesy, Fei Liu, Fabien Zunino, Marie-Paule Jouannetaud, Christian Bachmann, Christian Berrier
Publikováno v:
Journal of Fluorine Chemistry. 129:775-780
In HF/SbF 5 , in the presence of CCl 4 or NBS, unsaturated or hydroxylated piperidines yield difluoroanalogues in good yields. The ability to perform hydride abstraction on chloroderivatives, and the ability to form bridged bromonium ions from unsatu
Publikováno v:
Tetrahedron Letters. 49:1551-1554
Nucleophilic para-fluorination of substituted anilines to afford 4-fluorocyclohexadieneimine derivatives is achieved in the presence of hypervalent iodine and pyridinium polyhydrogen fluoride.
Autor:
Jean-Claude Jacquesy
Publikováno v:
Journal of Fluorine Chemistry. 127:1484-1487
This is a summary of a lecture presented at the 100th Anniversary, Moissan Symposium in Paris on Friday 10th November 2006. In HF/SbF 5 , Vinca alkaloids react selectively at the D’ring of the molecule. In the presence of CHCl 3 (or CCl 4 ), vinore
Publikováno v:
Tetrahedron. 62:10248-10254
In HF–SbF5, with or without H2O2, a source of ‘OH+’ equivalent, quinidine 1a yields three ethers, the preferred conformation of the substrate favoring the observed cyclization. Under similar conditions, quinidine acetate 1b, epiquinidine 2a, an
Publikováno v:
Tetrahedron Letters. 47:5723-5726
In HF–SbF 5 , in the presence of H 2 O 2 (source of OH + equivalent) quinine 1a yields 10-keto derivatives 4a and 5a and cyclic ether 3 as the major product. In the same conditions 1b , 2a , and 2b give the 10-keto and 10-fluoro-3-hydroxy analogs.
Autor:
Alain Cousson, Sebastien Debarge, Bruno Violeau, Jean-Claude Jacquesy, Marie-Paule Jouannetaud
Publikováno v:
Tetrahedron. 62:662-671
In HF–SbF5, quinidine 1a or its dihydrochloride cyclises previously obtained with usual acids. A similar reaction is observed in the presence of CCl4. Under similar conditions quinidine acetate 1b and epiquinidine acetate 2b dihydrochlorides both y
Autor:
Alain Cousson, Sebastien Debarge, Bruno Violeau, Agnès Martin-Mingot, Sébastien Thibaudeau, Jean-Claude Jacquesy, Marie-Paule Jouannetaud
Publikováno v:
Tetrahedron. 61:2065-2073
In HF-SbF5, quinine 1a or its dihydrochloride rearranges into compound 3 (89%), the preferred conformation of the substrate favouring the observed cyclization. Under similar conditions epiquinine 2a dihydrochloride yields in equal amounts two 10,10-d
Autor:
Bruno Violeau, Jean-Claude Jacquesy, Marie-Paule Jouannetaud, Nohair Bendaoud, Sebastien Debarge
Publikováno v:
Tetrahedron Letters. 44:1747-1750
In a one pot procedure, treatment of chloro or methyl substituted acetanilides in HF/SbF 5 /CCl 4 followed by addition of HF/pyridine yields trifluoromethyl derivatives with high regioselectivity.
Autor:
Jean-Claude Jacquesy, Agnès O. Martin, Marie-Paule Jouannetaud, Sébastien Thibaudeau, Axelle Moine
Publikováno v:
Tetrahedron Letters. 43:4119-4122
In HF–SbF5, in the presence of N-bromosuccinimide, allylic or halogenoamines yield gem-difluoroamines, through bromofluorointermediates.
Publikováno v:
Tetrahedron Letters. 40:4183-4186
Methoxy or fluoro hydroindolenones and hydroquinolenones can be obtained by oxidation of the corresponding 4-substituted open-chain phenolds with C6H5I(OCOCF3)2 with methanol or pyridinium polyhydrogen fluoride followed by an intramolecular con