- Aminopolycarboxylic acid-series chelating agent, heavy metal compound thereof, photographic additive, and processing method
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There is disclosed a compound represented by the following formula (I): ???wherein R1and R2each represent a hydrogen atom, an alkyl group, an aryl group, a heterocyclic group, a carboxyl group, an amino group, an alkoxy group, a sulfo group, a nitro group, a phosphono group, an acylamino group, a sulfonylamino group, an aryloxy group, a sulfamoyl group, a carbamoyl group, an alkylthio group, an arylthio group, an acyl group, a hydroxamic acid group, or a hydroxyl group; R3represents a hydrogen atom, an alkyl group substituted with at least one selected from a group consisting of an alkoxy group, an aryl group and a heterocyclic group, an unsubstituted alkyl group, an aryl group, or a heterocyclic group; W represents a divalent linking group having a carbon atom(s); m and n are each an integer of 1 to 3, with the proviso that when n = 1, R3does not represent a hydrogen atom, when n = 2 or 3, at least one of nR3's represents an alkyl group, an aryl group, or a heterocyclic group, and when m and n are each 2 or more, mR1's are the same or different and nR3's are the same or different, and M1, M2, and M3each represent a hydrogen atom or a cation. The compound is a chelating agent for various metals that is excellent in biodegradability and metal sequestering capacity.
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- Reversible Closure and Cleavage of the Aziridinium Ring by Nucleophilic Substitution: Solvent Effects
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The kinetics of ring opening of aziridinium ion by chloride and bromide ions in DMSO-water mixtures have been studied and compared with previously reported data on the reverse reaction.Activation parameters indicate that the C-Hal bond in the transition state of the reaction develops to a minor extent.This assumption is corroborated by the bromide:chloride ratio.Correlations with Kamlet-Taft solvent parameters showed that both opening and closure of the aziridinium ring are characterized by a similar nucleophilic solvation term.Taking this fact into account we assume a considerable degree of ring formation in the transition state of the reaction under study.
- Chechik, Victor O.,Bobylev, Vladimir A.
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p. 837 - 842
(2007/10/02)
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- Chain length dependent reactivity of 2-(ω-hydroxyalkyl)-4-(ω'-hydroxyalkylamino)phthalazin-1(2H)-ones in azeotropic hydrobromic acid
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In boiling 48% HBr conversions of title compounds (5a-f) resulted in 2-(ω-bromoalkyl)-4-(2-hydroxyethylamino)-phthalazinones 8a,c, angular tricycles 7a,c-f and the 14a tricyclic dione, respectively, depending on the lengths of the side chains and the reaction time applied. The large difference between the reactivities of 4-(2-hydroxyethylamino)- and 4-(3-hydroxypropylamino) homologues in the exchange OH → Br was interpreted on the basis of the relative OH-basicities in the N3-protonated molecules. The proposed mechanism for the conversion to 14a involving a Smiles-type rearrangement was supported by additional experiments with 4-amino-2-(ω-hydroxyalkyl)-phthalazinones 15a,b.
- Csampai,Kormendy,Ruff
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p. 4457 - 4464
(2007/10/02)
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- Triazinyl reactive dyestuffs in which triazinyl group is further substituted with a beta-chloroethylsulfonyl- or vinylsulfonylbutyrylamino moiety
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Reactive dyes of the formula STR1 in which D is the radical of an organic dye of the monoazo, polyazo, metal complex azo, anthraquinone, phthalocyanine, formazan, azomethine, dioxazine, phenazine, stilbene, triphenylmethane, xanthene, thioxanthrone, nitroaryl, naphthoquinone, pyrenequinone or perylenetetracarbimide series, R is hydrogen or substituted or unsubstituted C1-4 -alkyl, X is a substituent which is detachable as an anion, B is a radical of the formula STR2 R1 and R2, independently of each other, are hydrogen or substituted or unsubstituted C1-4 -alkyl or phenyl, A is a substituted or unsubstituted aliphatic or aromatic bridge member, Y is a --CO--Z or --SO2 --Z radical, Z is an aliphatic, aromatic or heterocyclic reactive radical, and n is 1 or 2, are suitable for dyeing or printing cellulose-containing and nitrogen-containing materials and in high dyeing yield produce dyeings and prints having good fastness properties.
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- Preparation of esters of phosphorus acids
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Esters of phosphorus acids are prepared by an improved process whereby aromatic alcohols and phosphorus halides are reacted at specified temperatures in the presence of amine catalysts thereby providing high yields of substantially pure esters and allowing preparation of selected halogen-containing mono- and di-esters of phosphorus acids wherein halogen is directly bonded to phosphorus having substantially no side reactant contamination. The phosphorus esters are useful as intermediates in the preparation of plasticizers, oil additives and functional fluids.
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