Zobrazeno 1 - 10
of 108
pro vyhledávání: '"Henri Christol"'
Publikováno v:
Phosphorous and Sulfur and the Related Elements. 26:39-51
The activated triple bond of But-2-yn-1,4 ylen-bistripenylphosphonium 1 adds nucleophiles having mobile hydrogen ZH to give new polyfunctional phosphorus reagents. bisphosphonium salts containing the following entities: enamines with alkyl or arylami
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de29e4238000145dbf8bc03d57e6b9c2
https://doi.org/10.1080/03086648608084568
https://doi.org/10.1080/03086648608084568
Publikováno v:
Tetrahedron. 36:2757-2763
Resume L'action du brome ou du NBS sur des dioxa-3,5 aryl-4 syn tricyclo [5.2.1.O 2.6 ] decanes permet d'isoler des intermediaires dioxolannylium, especes transitoires dont l'existence n'etait jusqu'a present qu'hypothetique. On met de plus en eviden
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e855630b9eb0f8377e26f7399e8b15b
https://doi.org/10.1016/0040-4020(80)80152-9
https://doi.org/10.1016/0040-4020(80)80152-9
Publikováno v:
Phosphorus and Sulfur and the Related Elements. 14:73-80
From the 31P and 13C NMR data, we have been able to analyze the course of the reaction between vinylene-1,2 bistriphenylphosphonium dibromide and compounds having a mobile hydrogen, in the presence of a base. We have proposed a global process with th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b8ed9123e05006a8ce14d2ed9c299f4
https://doi.org/10.1080/03086648208073112
https://doi.org/10.1080/03086648208073112
Publikováno v:
Tetrahedron Letters. 23:1569-1572
The a4 umpolung of α-allenic ketone sis performed using the triphenylphosphonio group. It results in inducing an electrophilic character at the carbon ψ to the carbonyl function and in changing the regioselectivity of the additions of active hydrog
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05756a8c60f472c4d8e98b5f4c0d87f1
https://doi.org/10.1016/s0040-4039(00)87160-9
https://doi.org/10.1016/s0040-4039(00)87160-9
Publikováno v:
Phosphorus and Sulfur and the Related Elements. 25:357-367
The reactivities and selectivities of phosphonium tribromides 1–4 towards ketones and their ketals, in the presence of other functional group reactive towards bromide (free enolic position, activated aromatic ring or double bond), are studied and c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a78a4b12ff15e23aaf1ba3a7a7140bc
https://doi.org/10.1080/03086648508072751
https://doi.org/10.1080/03086648508072751
Publikováno v:
Organic Magnetic Resonance. 6:346-354
A large series of cyclohexane and cyclopentane spiro compounds has been studied by carbon‐13 NMR. Increments have been derived in terms of α, β, γ spiro substituent effects, one ring being considered as the substituent of the other. As usual α
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0409b83f30435c1f0628b835c0c23e0a
https://doi.org/10.1002/mrc.1270060610
https://doi.org/10.1002/mrc.1270060610
Publikováno v:
Electrochimica Acta. 29:381-386
The electrochemical reduction of 1,2-vinylene and 1,4-butadienylene bis-phosphonium salts has been investigated on a mercury cathode in unbuffured or acidic hydroorganic media. It is controlled by ylid character of the radical obtained after the firs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d868aea97df9492c5a92d97c5ae2b277
https://doi.org/10.1016/0013-4686(84)87078-4
https://doi.org/10.1016/0013-4686(84)87078-4
Publikováno v:
Phosphorus and Sulfur and the Related Elements. 4:287-293
In basic hydrolysis of the phosphonium salts (4), (C6H5)3P–CH2CH2Y X−, vinylphosphonium salts (5), (C6H5)3P–CH[dbnd]CH2 X−, are formed by an elimination mechanism. This mechanism takes place for the leaving groups Y = OC6H5. OAc, OH and Br, b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b87dd2646f0b35fbcc21cf25939c7a54
https://doi.org/10.1080/03086647808069840
https://doi.org/10.1080/03086647808069840
Publikováno v:
Tetrahedron Letters. 16:1381-1384
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1cce8b47da52081fe9d13c484db4a87
https://doi.org/10.1016/s0040-4039(00)72148-4
https://doi.org/10.1016/s0040-4039(00)72148-4
Publikováno v:
Canadian Journal of Chemistry. 59:2373-2381
The opening of cyclopropanes, bearing a carboxyl group, in formic acid leads to complex mixtures containing less than 30% lactones formed by an intramolecular nucleophilic process during the reaction. We show that the relative stereochemistry of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::600ae37104ff843795cb46911d3e1965
https://doi.org/10.1139/v81-343
https://doi.org/10.1139/v81-343