- N-Chloro-2,3,4,4,5,6-hexachlorocyclohexa-2,5-dienylideneamine as a mild and highly regioselective chlorinating reagent
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N-Chloro-2,3,4,4,5,6-hexachlorocyclohexa-2,5-dienylideneamine was used as a new, mild and highly regioselective chlorinating reagent in the chlorination of phenol and o-cresol in CCl4, DMF and CH3CN. The effects of C2H5OH, C5H5N, DMF and Et3N on the regioselectivity in CCl4 have also been examined.
- Mamaghani,Zolfigol,Shojaei
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p. 735 - 740
(2007/10/03)
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- NOUVEAUX DECONTAMINANTS. DESTRUCTION CHIMIQUE DU PARAOXON ET DU PARATHION AU MOYEN DE COMPOSES A CHLORE POSITIF
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The use of compounds possessing positive chlorine and precursors of hypochlorite anions, with different micellar systems, permits the very rapid and complete destruction of paraoxon and parathion taken as models of insecticides or potent chemical warfare
- Hedayatullah, Mir,Lion, Claude,Tourki, Amel
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p. 281 - 292
(2007/10/02)
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- 1,8-CD.
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The authors report on **3**5Cl NQR experiments on polycrystalline alpha -TKN, beta -TKN, TCNS, and a few other compounds connected with these photochromic substances. The crystal structure of TCNS was determined. It is shown that the **3**5 Cl NQR frequen
- Brummer,Weiss
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p. 873 - 879
(2007/10/02)
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- HALOGENATION REGIOSELECTIVE EN SERIE AROMATIQUE-I CHLORATION DES PHENOLS ET LEURS ETHERS A L'AIDE DE REACTIFS METTANT EN JEU DES INTERACTIONS DONNEUR-ACCEPTEUR
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An efficient regiospecific route for the chlorination of phenol involving hexachlorohexadienones is described.The selectivity is attained by using a reagent tailored in such a way that it is able to participate in charge transfer interactions and hydrogen bonding with the substrate.This recognition between substrate (phenol) and 2,3,4,4,5,6-hexachlorocyclohexa 2,5-dien 1-one 1 which we called "reactif p" allows the chlorination of phenol in the para position.The use of 2,3,4,5,6,6-hexachlorocyclohexa 2,4-dien-1 one 2 we have called "reactif o" permits the chlorination in the ortho position.These two reagents are stable and inexpensive materials, synthetized from pentachlorophenol and chlorine.The chlorination of anisole with these two reagents, gives solely the parachloro derivative, under steric control.
- Guy, Alain,Lemaire, Marc,Guette, Jean-Paul
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p. 2339 - 2346
(2007/10/02)
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