Tag: M.W=200-250

Zheng, Hai-jin published the artcileSynthesis and property of a new type of chromogenic reagent of thiazolylazo, Name: Sodium 3-bromopropane-1-sulfonate, the publication is Huaxue Yanjiu (2004), 15(3), 42-44, database is CAplus.

The synthesis of 2-(4,5-dimethyl-2-thiazoleazo)-4-methyl-5-sulfopropylaminobenzoic acid is reported. Its chromogenic property with Cu²⁺, Ni²⁺, Co²⁺ was studied. It can form stable compounds with Cu²⁺, Ni²⁺, Co²⁺. The maximum absorptions of these compounds are at 628 nm, 590 run, 583 nm, and their molar absorptivities (ε) are 8.4 × 10⁴, 5.8 × 10⁴ and 4.8 × 10⁴, resp. Also this material can be used as a good spectrophotometric chromogenic agent for some metal ions.

Huaxue Yanjiu published new progress about 55788-44-8. 55788-44-8 belongs to bromides-buliding-blocks, auxiliary class Bromide,Salt,Aliphatic hydrocarbon chain,Aliphatic hydrocarbon chain, name is Sodium 3-bromopropane-1-sulfonate, and the molecular formula is C15H14O3, Name: Sodium 3-bromopropane-1-sulfonate.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Gajda, Tadeusz published the artcilePreparation of diethyl 1-bromoalkylphosphonates, HPLC of Formula: 66197-72-6, the publication is Phosphorus, Sulfur and Silicon and the Related Elements (1990), 53(1-4), 327-31, database is CAplus.

RCHBrP(O)(OEt)₂ (R = H, Me, Et, Pr, Ph) were prepared by treating RCH(OH)P(O)(OEt)₂ with Ph₃P and CBr₄ in refluxing C₆H₆, or with Ph₃PBr₂ and pyridine in MeCN at room temperature Yields of 22-67% were obtained.

Phosphorus, Sulfur and Silicon and the Related Elements published new progress about 66197-72-6. 66197-72-6 belongs to bromides-buliding-blocks, auxiliary class Aliphatic Chain, name is Diethyl (bromomethyl)phosphonate, and the molecular formula is C5H12BrO3P, HPLC of Formula: 66197-72-6.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Griffin, C. E. published the artcilePhosphoryl stretching frequency correlation for phosphonic acid derivatives, Quality Control of 66197-72-6, the publication is Chemistry & Industry (London, United Kingdom) (1960), 1058-9, database is CAplus.

A plot of Σ σ* (Taft substituent constants) vs. γ_PO (as films in CS₂ or CCl₄) for 19 phosphonates [RP(O)XY] (I) gave a linear relationship; a least squares treatment of the data gave γ_PO = 16.80 Σσ* + 1198. The following I were studied (X = Y = OEt) (R given): Me, Et, Pr, Bu, n-C₆H₁₃, CH₂:CH, CH₂:CHCH₂, PhCH₂, Ph, ClCH₂, Cl₂CH, CCl₃ (II), BrCH₂, HOCH₂, AcCH₂. Also I (R, X, and Y given): Me, OMe, OMe; Me, OEt, NMe₂; Me, NMe₂, NMe₂ (III); Ph, H, OEt. The average deviation between calculated and observed frequencies was ±4 cm.^-1; the only significant deviation occurred with II and III, and may have arisen through disturbance of the normal inductive effects of the substituents by field effects. Major deviations from the linear relationship also occurred with frequency values obtained in the presence of H-bonding solvents. The following σ* values were tentatively assigned: (CH₂)₂CO₂Et, 0.39; (CH₂)₃CO₂Et, 0.39; NEt₂, 0.68.

Chemistry & Industry (London, United Kingdom) published new progress about 66197-72-6. 66197-72-6 belongs to bromides-buliding-blocks, auxiliary class Aliphatic Chain, name is Diethyl (bromomethyl)phosphonate, and the molecular formula is C5H12BrO3P, Quality Control of 66197-72-6.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Kuivila, Henry G. published the artcileOrganotin hydrides and organic free radicals, SDS of cas: 594-81-0, the publication is Accounts of Chemical Research (1968), 1(10), 299-305, database is CAplus.

The preparation and properties of organotin hydrides, their reduction of alkyl and aryl halides, aldehydes, ketones, isocyanates, and isothiocyanates and their addition to C-C double or triple bonds, their use in the study of organic free radicals, i.e. octen-5-yl free radicals, cyclization of unsaturated acyclic radicals, the tritylmethyl radical, free-radical β-eliminations, vinyl free radicals and photoreduction, are reviewed with 39 references.

Accounts of Chemical Research published new progress about 594-81-0. 594-81-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 2,3-Dibromo-2,3-dimethylbutane, and the molecular formula is C6H12Br2, SDS of cas: 594-81-0.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Liu, Yu-Cheng published the artcileFree radical reaction. Reaction of Grignard reagents with 2-bromo-2,3-dimethylbutane and with 1-chloro-1-methylcyclohexane in the presence of cobaltous halides, Application In Synthesis of 594-81-0, the publication is Acta Chim. Sinica (1956), 104-11, database is CAplus.

cf. C.A. 51, 14569e. CHMe₂CBrMe₂ (I) decomp, when treated with PhMgBr (II) and CoBr₂ (III) to give 35% CHMe₂CHMe₂ (IV), 31% CHMe₂CMe:CH₂ (V), and 2% CMe₂:CMe₂ (VI). I (0.45 mole) added dropwise to 0.5 mole freshly prepared II in 250 ml. Et₂O containing III with stirring, stirred with cooling several hrs., the product poured into ice H₂O, 30 ml. AcOH added, the Et₂O layer separated, washed neutral, dried, and fractionally distilled to 80° gave 25.8 g. fraction, b. 53-8°, n²⁰_D 1.3822, containing some V (infrared spectrum), mainly IV as shown by oxidation with O₃ in CCl₄ at 0° to CH₂O (IV derivative with saturated 5,5-dimethyldihydroresorcinol, m. 192-3°) and some Me₂CHCOMe; 2,4-(O₂N)₂C₆H₃NHNH₂ derivative, m. 114-15°. The fraction b. 71.5° (0.7 g.) proved to be VI, m. 165° (sublimation). The residue gave 33 g. biphenyl, m. 70-2°, on steam-distillation Treatment of 9.7 g. I with 11.2 g. KOH in 50 ml. glycol at 100-10° 1.5 hrs. gave 4.1 g. distillate, n²⁰_D 1.4076, a mixture of 79% VI and 21% V. Bromination of 0.5 g. of this mixture in CCl₄ yielded 61% CBrMe₂CBrMe₂, m. 170-5°. 1-Methylcyclohexyl chloride (VII) (0.2 mole) in 100 ml. absolute Et₂O added dropwise to 0.3 moles MeMgBr (VIII) in 320 ml. Et₂O with frequent addition (6.5 g. total) of III and stirring continued an addnl. hr. after complete evolution of the gas gave as the main distillate, b. 100-3°, n²⁰_D 1.4371, 62% mixture of C₆H₁₁Me, 1-methylcyclohexene (IX), and methylenecyclohexane. The % unsaturation of bromate-bromide titration and catalytic hydrogenation with Pt was 51, infrared absorption spectrum showed the presence of C:CH, and group oxidation with O₃ gave cyclohexanone; 2,4-dinitrophenylhydrazone, m. 158.5-9.5°. VII (26.5 g.) in 40 ml. absolute Et₂O with 0.4 mole iso-PrMgBr in 200 ml. Et₂O in the presence of 2.6 g. III in the same way as above gave 11.3 g. distillate, b. 100-3°, n²⁰_D 1.4348, % unsaturation = 42, a mixture of the same products as from VII and VIII. VII (5 g.) and 25 ml. 4N NaOH refluxed on a steam-bath 3 hrs., extracted with Et₂O, and distilled, gave 2.4 g. IX, b. 107-8°, n²⁰_D 1.4364. It is therefore suggested the disproportionation of alkyl radicals in solution is probably a bimol. reaction and the number of α-H atoms has a directive influence upon the orientation of olefin formation.

Acta Chim. Sinica published new progress about 594-81-0. 594-81-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 2,3-Dibromo-2,3-dimethylbutane, and the molecular formula is C6H12Br2, Application In Synthesis of 594-81-0.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Logusch, Eugene W. published the artcileA simple preparation of S-alkyl homocysteine derivatives: S-phosphonomethyl homocysteines as inhibitors of glutamine synthetase, Name: Diethyl (bromomethyl)phosphonate, the publication is Tetrahedron Letters (1988), 29(47), 6055-8, database is CAplus.

A facile synthesis of S-alkyl homocysteines is described which features the coupling of sodium alkyl thiolates with Me 4-bromo-2-phthalimidobutyrate, followed by hydrolysis. This approach is exemplified by the synthesis of H₂O₃PCH₂SO₂CH₂CH₂CH(NH₂)CO₂H, a new inhibitor of the enzyme glutamine synthetase.

Tetrahedron Letters published new progress about 66197-72-6. 66197-72-6 belongs to bromides-buliding-blocks, auxiliary class Aliphatic Chain, name is Diethyl (bromomethyl)phosphonate, and the molecular formula is C5H12BrO3P, Name: Diethyl (bromomethyl)phosphonate.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Malamas, Michael S. published the artcileFacile synthesis of novel spiro[azetidine-2,4′(1’H)-isoquinoline-1′,3′,4(2’H)-triones], Application of (4-Bromo-2-fluorophenyl)methanamine hydrochloride, the publication is Journal of Heterocyclic Chemistry (1994), 31(2), 565-8, database is CAplus.

A convenient general method for the synthesis of a new heterocycle, spiro[azetidine-2,4′(1’H)-isoquinoline-1′,3′,4(2’H)-trione] (I, R¹ = H, halo; R² = Me, CH₂C₆H₃FBr-2,4) is described. The key intermediate II (R = Cl) was prepared by direct halogenation of position-4 of acid II (R = H) with thionyl chloride, and subsequent treatment of the generated 4-Cl, 4-acetyl chloride derivative with a THF/NH₃ solution at low temperature

Journal of Heterocyclic Chemistry published new progress about 147181-08-6. 147181-08-6 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Salt,Amine,Benzene, name is (4-Bromo-2-fluorophenyl)methanamine hydrochloride, and the molecular formula is C7H8BrClFN, Application of (4-Bromo-2-fluorophenyl)methanamine hydrochloride.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Miyagawa, Ichiro published the artcileStudies on internal rotation by the measurement of dipole moments. IV. The dipole moments of some halogenated hydrocarbons, Product Details of C6H12Br2, the publication is Nippon Kagaku Kaishi (1921-47) (1954), 1162-5, database is CAplus.

cf. C.A. 48, 13297h. The dipole moments of 2,3-dichloro-2,3-dimethylbutane, 2,3-dibromo-2,3-dimethylbutane, 1,2-dibromo-2-methylpropane, and 1,1,2-tribromoethane were measured in heptane at -20° to 50°. The energy difference between a trans and a gauche form and the moment of the gauche form were calculated The moment of 1,1,2-tribromoethane is independent of temperature The moment of this compound corresponds to that of the gauche form rather than to that of the C_s form.

Nippon Kagaku Kaishi (1921-47) published new progress about 594-81-0. 594-81-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 2,3-Dibromo-2,3-dimethylbutane, and the molecular formula is C6H12Br2, Product Details of C6H12Br2.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Moritz, A. G. published the artcileHydrogen bonding in N-(2-hydroxybenzyl)aniline, Computed Properties of 53484-26-7, the publication is Spectrochimica Acta (1959), 242-8, database is CAplus.

The O-H and N-H stretching frequencies (3200 to 3600 cm.^-1) of a number of N-benzylanilines and N-(2-hydroxybenzyl)anilines were measured in dilute CCl₄ solution and attempts made to relate the observed spectra to the known effects of substituents. The results indicate that rotational isomerism probably occurs in the N-benzylanilines and that the intramol. H bond in the N-(2-hydroxybenzyl)aniline is responsible for a change in hybridization on the N atom.

Spectrochimica Acta published new progress about 53484-26-7. 53484-26-7 belongs to bromides-buliding-blocks, auxiliary class Bromide,Nitro Compound,Amine,Benzene, name is 4-Bromo-N-methyl-2-nitroaniline, and the molecular formula is C7H7BrN2O2, Computed Properties of 53484-26-7.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Phillips, Montague A. published the artcileAction of hydrobromic acid on certain arsonic acids, Name: 4-Bromo-N-methyl-2-nitroaniline, the publication is Journal of the Chemical Society (1930), 2400-1, database is CAplus.

Boiling the following benzenearsonic acids with 3-4 times their weight of HBr (d. 1.445) gives the following products: 3,4-O₂N(H₂N), 4,2-Br-(O₂N)C₆H₃NH₂ (97%); 4,3-O₂N(H₂N), 5,2-Br(O₂N)C₆H₃NH₂ (96%); 3,4-O₂N(MeNH), 4,2-Br(O₂N)C₆H₃NHMe (92%); 4-nitro-3-methylamino, yellow plates, 5,2-Br(O₂N)C₆H₃NHMe (80%); 3,4-O₂N(HO), mixture of polybrominated nitrophenols, from which 20% of 2,4,6-Br₂(O₂N)C₆H₂OH was isolated; 3,4-H₂N(HO), 4,2-Br(H₂N)C₆H₃OH (about 20%); 3,4-AcNH(HO), the same product as before; 4,3,5-H₂N(O₂N)2, 4,2,6-Br(O₂N)₂C₆H₂NH₂ (96%). No decompn, occurred with the 6,3-O₂N(H₂N) derivative The 4,3-O₂N(HO) and 2,3-O₂N(HO) derivatives gave mixtures which could not be separated

Journal of the Chemical Society published new progress about 53484-26-7. 53484-26-7 belongs to bromides-buliding-blocks, auxiliary class Bromide,Nitro Compound,Amine,Benzene, name is 4-Bromo-N-methyl-2-nitroaniline, and the molecular formula is C7H7BrN2O2, Name: 4-Bromo-N-methyl-2-nitroaniline.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary