Month: December 2022

Runge, P. K. published the artcileMode-locking of helium-neon lasers with saturable organic dyes, Synthetic Route of 10510-54-0, the publication is Optics Communications (1971), 3(6), 434-6, database is CAplus.

Cresyl Violet, Cresyl Violet Acetate, and Nile Blue A [(0.8-3.3) ¡Á 10-4M in MeOH] acted as saturable absorbers for mode-locking 2 He-Ne lasers (10 and 1.8 m long, resp.) at ¦Ë = 6328 ?. The optical pulse width decreased linearly with increasing pulse energy. The min. pulse width was 220 psec for the 10-m laser (with 2 ¡Á 10-4M Cresyl Violet) at a peak power d. of 2.5 ¡Á 108 W/cm2. The min. power d., at which mode-locking was observed, was 2 ¡Á 105 W/cm2 for the 1.8-m laser. The dye concentration determined the pulse repetition rate of the laser.

Optics Communications published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is C18H15N3O3, Synthetic Route of 10510-54-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Ruiz Cruz, J. published the artcilePollution of natural waters by synthetic detergents. XVIII. Biodegradability of cationic surface-active agents by different standard methods, Recommanded Product: Dodecylamineacetate, the publication is Grasas y Aceites (Sevilla, Spain) (1987), 38(6), 383-8, database is CAplus.

There were no significant differences in cationic surfactant biodegradability results when tested by the Spanish standard and OECD methods. Several cationic surfactants were tested for their biodegradability in river waters and the results are presented.

Grasas y Aceites (Sevilla, Spain) published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H31NO2, Recommanded Product: Dodecylamineacetate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Ripper, Erwin published the artcileInvestigation of propellants, Name: Bis(4-nitrophenyl)amine, the publication is Explosivstoffe (1967), 15(3), 57-64, database is CAplus.

Thin-layer chromatog. is applied to ascertain changes in composition of explosive stabilizers such as Ph2NH occurring during storage. Ph2NH can undergo nitration, the NO2 groups coming from the slow decomposition of explosives, such as nitroglycerine (I) and (or) nitrocellulose. The explosive is chromatographed on a SiO2 gel column followed by elution with a 5:3:2 by volume mixture of C6H6, CCl4, and 1,2-dichloroethane. The Rf values of many NO2 derivatives of Ph2NH are given. Identification of the eluted compounds can be accomplished by color, reaction with color-producing reagents, and by characteristics fluorescence in uv light. It is also possible to extract selectively from the explosive the Ph2NH derivatives only by using CH2Cl2 as solvent. Thin-layer chromatog. can be successfully used to determine the presence of other explosive-powder stabilizers, such as Akardit I and II, Centralite I and II, and Et phenylurethane. In such analysis, a 30:70 mixture of iso-Pr2O and petroleum ether is used as eluant. The same solvents must be used to detect dinitrotoluene (II) in the presence of I and Ph2NH. During elution with the above solvent mixture, I hardly moves, in contrast to Ph2NH and II. Intensive decomposition of a stabilizer can originate from poor compatability between the explosive and the storage material. Also for such cases, thin-layer chromatog. is applicable. The chromatog. method can be extended for obtaining quant. results through reference curves shown in the original and obtained by plotting extinctions vs. concentrations of substances such as Ph2NH and its derivatives 26 references.

Explosivstoffe published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, Name: Bis(4-nitrophenyl)amine.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Raisfeld, Ilene H. published the artcileRole of terminal substituents in the pulmonary toxicity of bleomycins, Quality Control of 10517-44-9, the publication is Toxicology and Applied Pharmacology (1981), 57(3), 355-66, database is CAplus and MEDLINE.

Amines with structures identical to the chem. substituents X linked to the bithiazole rings of various bleomycins (I) were studied for their pulmonary toxicity in mice. Thus, intratracheally administered putrescine-2HCl [333-93-7], spermidine-3HCl [334-50-9], spermine-4HCl [306-67-2], histamine-HCl [56-92-8], 1,3-diaminopropane-HCl [10517-44-9], and agmatine sulfate [2482-00-0] produced dose-related lesions of pulmonary fibrosis and metaplasia indistinguishable from lesions produced by intact bleomycins. The high pulmonary toxicity of bleomycin A5 [11116-32-8] relative to bleomycin B2 [9060-10-0] corresponded to the changes produced by their resp. spermidine and agmatine substituents. An important role is suggested for the terminal substituent in bleomycin-induced lung injury.

Toxicology and Applied Pharmacology published new progress about 10517-44-9. 10517-44-9 belongs to catalysis-chemistry, auxiliary class Salt,Amine,Aliphatic hydrocarbon chain, name is Propane-1,3-diamine dihydrochloride, and the molecular formula is C3H12Cl2N2, Quality Control of 10517-44-9.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Raftery, Monica M. published the artcileExplosibility tests for industrial dusts, Related Products of catalysis-chemistry, the publication is Fire Research Technical Paper (United Kingdom, Joint Fire Research Organization) (1975), 14 pp., database is CAplus.

Apparatus and procedures used for testing explosibility of industrial dust suspensions by the Fire Research Station are described. The min. ignition temperature, explosible concentration, and ignition energy and maximum explosion pressure, rate of pressure rise, and O concentration to prevent ignition are tabulated for 290 common industrial dusts, including metals, coal, foods, grain, paper, wood, rubbers, and plastics.

Fire Research Technical Paper (United Kingdom, Joint Fire Research Organization) published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, Related Products of catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Raasch, Maynard S. published the artcileChemistry of sulfur tetrafluoride. IX. Reaction with amino acids in hydrogen fluoride, Name: 1,1,1-Trifluoropropan-2-amine, the publication is Journal of Organic Chemistry (1962), 1406-9, database is CAplus.

cf. Smith, CA 55, 6419i. SF₄ (I) converted the CO group in amino acids to a trifluoromethyl group when the reaction was carried out in HF. When an optically active amino acid was used, optical activity was retained in the resulting fluoro amine. Picolinic, nicotinic, and isonicotinic acids were converted into the Na salts of pipecolic, nipecotic, and isonipecotic acids by dissolving 100 g. of the acid in 300 ml. H₂O containing 33 g. NaOH and charging the solution and 3 g. Ru-C into a bomb, hydrogenating 9 hrs. at 120¡ã, filtering, evaporating, and drying the Na salt 16 hrs. at 90¡ã. Heating 95 g. dodecylamine and 18.5 g. 2-chloropropionic acid 15 hrs. at 100¡ã gave 19 g. N-dodecyl-DL-alanine, m. 210-13¡ã (AcOH-H₂O). The general procedure was to heat 8 hrs. at 120¡ã 0.4 equivalent of the amino acid, 50 g. HF, and 100 g. I in a shaker tube. p-Aminobenzoic acid (14 g.), 100 g. HF, and 30 g. I heated 4 hrs. to 125¡ã then maintained 6 hrs. gave 37% p-aminobenzotrifluoride. With 2-aminobutyric acid, addnl. HF did not raise the low yield. In the absence of HF, I converted nicotinic acid to nicotinoyl fluoride in 50% yield, b₆ 50-2¡ã. This was easily hydrolyzed by H₂O. Except for the picolines, the reaction products were poured into a dish and heated to expel HF. The residue may be transferred to a steam distillation apparatus and steam distilled For the lower amines it was best to isolate as the hydrochloride. In the case of the products from simple aliphatic amino acids, the residue remaining after evaporation of HF stirred with H₂O, filtered, and the filtrate evaporated gave the solid amine-HF. The amine was liberated by addition of 40% KOH. The trifluoromethylpicolines were volatile and such weak bases that evaporation of the reaction mixture, unless carefully done, gave the free picoline. Hence, it was diluted with 75 ml. H₂O, made basic, the mixture steam distilled, and the oil separated The product obtained from quinaldie acid was warmed to expel most of the HF, the residue stirred with H₂O, crystalline 2-(trifluoromethyl)quinoline collected, and recrystallized from hexane. The product from 4,5-imidazoledicarboxylic acid was similarly treated. The following fluoro amines were thus obtained (product, starting amino acid, % yield, b.p., n²⁵_D, and pK_a given): CF₃CH₂NH₂, glycine, 24, 36¡ã, 1.3004, 5.6; CF₃(CH₂)₂NH₂, ¦Â-alanine, 41, 67.5-8.0¡ã, 1.3270, 8.6; CF₃(CH₂)₃NH₂, 4-H₂N(CH₂)₃CO₂H, 7.1, 90-1¡ã, 1.3452, 9.6; MeCH(CF₃)NH₂, DL-alanine, 29, 46-7¡ã, 1.3180, 5.8; EtCH(CF₃)NH₂, DL-2-aminobutyric acid, 3.5, 65-6¡ã, -, 5.7; PrCH(CF₃)NH₂, DL-norvaline, 2.5, 87-8¡ã, 1.3568, 5.7; BuCH(CF₃)NH₂, DL-norleucine, 14, 113-16¡ã, 1.3635, 5.7; Me(CH₂)₅CH(CF₃)NH₂, DL-2-aminooctanoic acid, 39, 158-60¡ã, 1,3825, -; Me₂C(CF₃)NH₂, 2-methylalanine, 35, 54¡ã, 1.3305, 5.8; iso-PrCH(CF₃)NH₂, DL-valine, 4.2, 83-4¡ã, 1.3540, 5.6; iso-PrCH₂CH(CF₃)NH₂, L-leucine, 22, 103-4¡ã, 1.3610, 5.6; CF₃(CH₂)₂CH(CF₃)NH₂, L-glutamic acid, 12, 106¡ã, 1.3222, 4.7; MeS(CH₂)₂CH(CF₃)NH₂, DL-methionine, 1.5, 160-2¡ã, 1.4260, 4.8; MeCH(CF₃)NH(CH₂)₁₁Me, N-dodecyl-DL-alanine, 61, 74-6¡ã/0.18 mm., 1.4119, -; PhCH₂CH(CF₃)NH₂, DL-phenylalanine, 3.6, 53-5¡ã/1 mm., 1.4613, -; p-CF₃C₆H₄NH₂, p-H₂NC₆H₄CO₂H, 37, 85¡ã/14 mm., -, -; 2-CF₃C₅H₁₀N, Na DL-pipecolate, 9.6, 122-4¡ã, 1.3905, 6.4; 3-CF₃C₅H₁₀N, Na DL-nipecotate, 40, 128-30¡ã, 1.3910, 8.7; 4-CF₃C₅H₁₀N, Na isonipecotate, 34, 133¡ã, 1.3920, 9.4; 2-CF₃C₅H₄N, picolinic acid, 53, 139-40¡ã, 1.4166, -; 3-CF₃C₅H₄N, nicotinic acid, 25, 113-15¡ã, 1.4150, -; 4-CF₃C₅H₄N, isonicotinic acid, 57, 108-10¡ã, 1.4155, -; 2-(trifluoromethyl)quinoline, quinaldic acid, 72, 233¡ã (m. 61.5-2.5¡ã), -, -; 4,5-bis(trifluoromethyl)imidazole, 4,5-imidazoledicarboxylic acid, 80, -(m. 167.5-8.0¡ã), -, -.

Journal of Organic Chemistry published new progress about 421-49-8. 421-49-8 belongs to catalysis-chemistry, auxiliary class Trifluoromethyl,Fluoride,Amine,Aliphatic hydrocarbon chain, name is 1,1,1-Trifluoropropan-2-amine, and the molecular formula is C3H6F3N, Name: 1,1,1-Trifluoropropan-2-amine.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Purchase, Rupert published the artcileThe purification of triethylenetetramine and its dihydrochloride for the treatment of Wilson’s disease, Recommanded Product: N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, the publication is Journal of Chemical Research (2005), 233-235, database is CAplus.

A method for the purification of triethylenetetramine and its dihydrochloride for use in the treatment of Wilson’s disease is reported. Thus, tech. grade triethylenetetramine (I) 1.18 Kg was mixed with water 262 mL and seeded with a few crystals of I hydrate; the precipitated I hydrate was collected and washed with THF and di-Et ether; the I hydrate was slurried with water 500 mL, cooled and treated with HCl to pH 7.8; evaporation of the aqueous solution (below 60¡ãC, 12 mmHg) and treatment of the residue with cold 95% ethanol afforded the dihydrochloride of I (854 g) containing a trace of impurity.

Journal of Chemical Research published new progress about 38260-01-4. 38260-01-4 belongs to catalysis-chemistry, auxiliary class Chelating Agents, name is N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, and the molecular formula is C6H20Cl2N4, Recommanded Product: N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Purchase, Rupert published the artcileThe link between copper and Wilson’s disease, Computed Properties of 38260-01-4, the publication is Science Progress (St. Albans, United Kingdom) (2013), 96(3), 213-223, database is CAplus and MEDLINE.

A review. Wilson’s disease (hepatolenticular degeneration) is a rare inherited autosomal recessive disorder of copper metabolism leading to copper accumulation in the liver and extrahepatic organs such as the brain and cornea. Patients may present with combinations of hepatic, neurol. and psychiatric symptoms. Copper is the therapeutic target for the treatment of Wilson’s disease. Discovering the linking of copper to Wilson’s disease encompasses a study of enzootic neonatal ataxia in lambs in the 1930s, the copper-chelating properties of British Anti-Lewisite, and the chem. anal. for copper of the organs of deceased Wilson’s disease patients in the mid-to-late 1940s. Wilson’s disease is one of a number of copper-related disorders where loss of copper homeostasis as a result of genetic, nutritional or environmental factors affects human health.

Science Progress (St. Albans, United Kingdom) published new progress about 38260-01-4. 38260-01-4 belongs to catalysis-chemistry, auxiliary class Chelating Agents, name is N1,N1′-(Ethane-1,2-diyl)bis(ethane-1,2-diamine) dihydrochloride, and the molecular formula is C6H20Cl2N4, Computed Properties of 38260-01-4.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Preston, John S. published the artcileSolvent extraction of nickel and cobalt by mixtures of carboxylic acids and non-chelating oximes, Application of 2-(4-(tert-Butyl)phenoxy)acetic acid, the publication is Hydrometallurgy (1983), 11(1), 105-24, database is CAplus.

The effect of nonchelating oximes on the solvent extraction of Ni(II) and Co(II) by solutions of carboxylic acids (H₂A₂) in xylene was studied. Synergistic enhancements of extraction were found with aldoximes, but not with ketoximes. The synergistic effects were larger for Ni than for Co. The influence of the mol. structure of the oxime and carboxylic acid components upon the synergistic effects was rationalized in terms of the prevailing stereochem. and electronic effects. The extracted complexes were octahedral in structure, with the compositions NiA₂(oxime)₄ and CoA₂(oxime)₄. The mixed reagent systems may prove useful for the selective extraction of Ni in the presence of Co.

Hydrometallurgy published new progress about 1798-04-5. 1798-04-5 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2-(4-(tert-Butyl)phenoxy)acetic acid, and the molecular formula is C12H16O3, Application of 2-(4-(tert-Butyl)phenoxy)acetic acid.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Peters, Arnold T. published the artcileElectron impact-induced fragmentation of nitrodiarylamine disperse dyes, Application In Synthesis of 1821-27-8, the publication is Journal of the Society of Dyers and Colourists (1973), 89(11), 385-8, database is CAplus.

Determination of the principal fragment ions and their relative abundance in the mass spectra of nitrodiphenylamines (I), dinitrodiphenylamines (II), and (nitroanilino)- (III) and anilinonitropyridines (IV) indicated that mol. ions of 2-nitrodiarylamines are more stable than those of 4-nitrodiarylamines. Fragmentation of the NO2 group in 4-nitrodiarylamines occurs more readily, and this more facile fragmentation may be related to the lower photochem. stability of these dyes. The presence of a heterocyclic N atom in the dyes facilitates NO2 group fragmentation.

Journal of the Society of Dyers and Colourists published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, Application In Synthesis of 1821-27-8.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia