Zobrazeno 1 - 10
of 75
pro vyhledávání: '"François Guibé"'
Publikováno v:
Synlett. 2009:1614-1618
In the reaction with tert-butyloxycarbonyl anhydride (Boc 2 O), N-(o-vinylacetyloxy)benzenesulfonyl allylic amines 4a―c undergo concomitant O to N acyl migration to give N-(o-vinyl-acetyloxy)-N-(o-tert-butoxycarbonyloxy)benzenesulfonyl allylic amin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fcd501ab88d3a5275e17e2dcaecc820f
https://doi.org/10.1055/s-0029-1217328
https://doi.org/10.1055/s-0029-1217328
Publikováno v:
Tetrahedron. 63:3728-3736
trans -(2′,2′-Diphenyl-bicyclopropyl-2-yl)-4,4-dimethyl-5-oxo-pent-2-enoic acid methyl ester 9 , undergoes 3- exo - trig cyclisation in the presence of SmI 2 without competitive ring opening of Newcomb's bicyclopropylic probe next to the carbonyl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af80091b746f4d6435490ef6d9ebc5b9
https://doi.org/10.1016/j.tet.2007.02.080
https://doi.org/10.1016/j.tet.2007.02.080
Publikováno v:
Synlett. :2362-2366
In the presence of samarium diiodide and a proton donor (tert-butanol or phenol), δ-oxo-y.y-disubstituted-alkylidenemalonates readily cyclise according to the 3-exo-trig mode to give. depending on the exact nature of the substrate, trans and cis cyc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d0c9950ebce4033ffbe85c2348aa179
https://doi.org/10.1055/s-2005-872683
https://doi.org/10.1055/s-2005-872683
Autor:
Hélène Villar, François Guibé
Publikováno v:
Tetrahedron Letters. 43:9517-9520
In the presence of samarium diiodide and a proton source, δ-oxo-γ,γ-disubstituted-α,β-unsaturated esters readily cyclise with complete diastereocontrol to give anti-cyclopropanol products.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4dc196765d048f97dc1bb5942876ecf0
https://doi.org/10.1016/s0040-4039(02)02437-1
https://doi.org/10.1016/s0040-4039(02)02437-1
Publikováno v:
Synlett. 2001:0037-0040
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc2adaf0628d06b0bc3a9b152b7f9a67
https://doi.org/10.1055/s-2001-9705
https://doi.org/10.1055/s-2001-9705
Publikováno v:
Letters in Peptide Science. 7:187-194
The solid-phase synthesis of peptides containing Cys has been carried out using the new thiol protecting group Fsam, which is completely stable to basic and acidic conditions used in both main strategies and can be selectively removed by palladium-ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b68e99323415c4bfae5df7daa244170d
https://doi.org/10.1007/bf02447857
https://doi.org/10.1007/bf02447857
Publikováno v:
Tetrahedron Letters. 41:3335-3338
Monoepoxides of diene-esters are regio- and stereoselectively reduced to homoallylic alcohols by dimethylamine–borane complex in the presence of acetic acid and catalytic amounts of Pd(PPh3)4.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::73e57700b542ab10e7697eb921240ae2
https://doi.org/10.1016/s0040-4039(00)00380-4
https://doi.org/10.1016/s0040-4039(00)00380-4
Autor:
Carlos Afonso, Marie-George Guillerez, François Guibé, Gilles Doisneau, Hervé David, Martine Bonin
Publikováno v:
Tetrahedron Letters. 40:8557-8561
δ-Iodo- and δ-bromo-α,β-unsaturated esters with various substituents at the β- and γ-positions readily cyclise to cyclopropane compounds in the presence of samarium diiodide and a proton source.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::585b905de3776d093e7cda3b1ec07491
https://doi.org/10.1016/s0040-4039(99)01816-x
https://doi.org/10.1016/s0040-4039(99)01816-x
Publikováno v:
Tetrahedron. 55:6945-6960
S-[N-[2,3,5,6-tetrafluoro-4-(N′-piperidino)-phenyl], N-allyloxycarbonyl]-aminomethyl (Fnam) derivatives of thiols in general and cysteine in particular are readily deprotected by palladium catalysed allylic cleavage in the presence of various nucle
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0819b0532261df804f7447b19e140b01
https://doi.org/10.1016/s0040-4020(99)00323-3
https://doi.org/10.1016/s0040-4020(99)00323-3
Publikováno v:
Tetrahedron. 55:6931-6944
S-allyloxycarbonylaminomethyl derivatives of thiols in general and cysteine in particular are readily deprotected by palladium catalysed hydrostannolysis with tributyltin hydride in the presence of acetic acid. They are perfectly stable in the basic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8778b522b0d24aacf341b738c7cf4ef0
https://doi.org/10.1016/s0040-4020(99)00322-1
https://doi.org/10.1016/s0040-4020(99)00322-1