Author: Jessica.F

Suga, Hiroshi published the artcileCrystallochemical study by differential thermal analysis. II. Detection of phase transition, Application In Synthesis of 594-81-0, the publication is Nippon Kagaku Zasshi (1961), 29-32, database is CAplus.

The phase transition was detected for some mol. crystals by means of a programmed automatic controlling-and-recording apparatus for differential thermal analysis. 2,3-Dimethyl-2,3-dibromobutane showed transitions at -91 and 70-80° with estimated heats of transition of about 500 and 1000 cal./mole, resp. Si(OMe)₄, AcNHMe, and triglycine sulfate showed transitions at -98, 2, and 0-50° with estimated heats of transition of about 100, 100, and 200 cal./mole, resp. The phase transition of resorcinol from the α-type to the β-type was detected thermally. The estimated enthalpy accompanying this transition agreed with the value of Ubbelohde and Robertson (CA 31, 7719³) calculated from the heats of solution of the 2 crystalline forms in water.

Nippon Kagaku Zasshi 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 C16H24BF4Ir, Application In Synthesis of 594-81-0.

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

Harada, Yasuyuki published the artcileRh(I)-Catalyzed Carbonylative Cyclization Reactions of Alkynes with 2-Bromophenylboronic Acids Leading to Indenones, Application of 2-Bromo-5-methoxybenzene boronic acid, the publication is Journal of the American Chemical Society (2007), 129(17), 5766-5771, database is CAplus and MEDLINE.

The Rh-catalyzed reaction of alkynes with 2-bromophenylboronic acids involves carbonylative cyclization to give indenones. The key steps in the reaction involve the addition of an arylrhodium(I) species to an alkyne and the oxidative addition of C-Br bonds on the adjacent Ph ring to give vinylrhodium(I) species II. The regioselectivity depends on both the electronic and the steric nature of the substituents on the alkynes. A bulky group and an electron-withdrawing group favor the α-position of indenones. In the case of silyl- or ester-substituted alkynes, the regioselectivity is extremely high. The selectivity increases in the order SiMe₃ > COOR ≫ aryl ≫ alkyl. The reaction of norbornene with 2-bromophenylboronic acids under 1 atm of CO gives the corresponding indanone derivative The reaction of alkynes with 2-bromophenylboronic acids under nitrogen gives naphthalene derivatives, in which two mols. of alkynes are incorporated. A vinylrhodium complex similar to II can also be generated by a different route by employing 2-bromophenyl(trimethylsilyl)acetylene and arylboronic acids in the presence of Rh(I) complex as the catalyst, resulting in the formation of indenones. The reaction of 1-(2-bromophenyl)-hept-2-yn-1-one with PhB(OH)₂ in the presence of Rh(I) complex also resulted in carbonylative cyclization to give an indan-1,3-dione derivative

Journal of the American Chemical Society published new progress about 89694-44-0. 89694-44-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzene,Ether,Boronic Acids,Boronic acid and ester, name is 2-Bromo-5-methoxybenzene boronic acid, and the molecular formula is C7H8BBrO3, Application of 2-Bromo-5-methoxybenzene boronic acid.

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

Tsukamoto, Hirokazu published the artcileScalable Total Syntheses and Structure-Activity Relationships of Haouamines A, B, and Their Derivatives as Stable Formate Salts, Formula: C7H8BBrO3, the publication is Chemistry – A European Journal (2020), 26(55), 12528-12532, database is CAplus and MEDLINE.

Haouamines A, B, and their derivatives were synthesized via Suzuki-Miyaura coupling and three key cyclization reactions as follows: the newly developed palladium(0)-catalyzed arylative cyclization of phenylalanine-derived alkyne-aldehydes with 2-bromoarylboronic acid (an “anti-Wacker”-type cyclization); BF₃·OEt₂-promoted Friedel-Crafts-type cyclization of sym. electron-rich aromatic rings adjacent to a tertiary allylic alc. leading to the indeno-tetrahydropyridine skeleton; and (cyanomethyl)trimethylphosphonium iodide-mediated macrocyclization of amino alcs. to afford aza-paracyclophane precursors. The palladium-catalyzed reduction of mono- and di-triflate intermediates in the later stages enabled the alteration of both the position and number of hydroxyl groups on the C-ring. The instability of haouamine B was dramatically improved by salt formation with formic acid. An unambiguous evaluation of the cytotoxicity of the prepared haouamine derivative formates with and without hydroxyl groups at different positions on the C-ring indicated that the catechol structure in haouamine B produced weak cytotoxicity.

Chemistry – A European Journal published new progress about 89694-44-0. 89694-44-0 belongs to bromides-buliding-blocks, auxiliary class Bromide,Boronic acid and ester,Benzene,Ether,Boronic Acids,Boronic acid and ester, name is 2-Bromo-5-methoxybenzene boronic acid, and the molecular formula is C9H8O4, Formula: C7H8BBrO3.

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

Yadav, Veejendra K. published the artcileAllylsilane-interrupted homo-Nazarov cyclization and synthesis of bicyclo[3.2.1]octan-8-ones, Recommanded Product: 3-Bromo-2-methylpropanoic acid, the publication is Tetrahedron Letters (2014), 55(12), 2015-2018, database is CAplus.

The combination of homo-Nazarov cyclization of 2-(tert-butyldiphenylsilylmethyl)cyclopropyl vinyl ketone leading to oxyallyl cation and its subsequent [3+2] capture by allylsilane has been demonstrated as an useful strategy for the construction of functionalized bicyclo[3.2.1]octan-8-ones. The [3+2] capture proceeds exclusively in the exo mode to make the overall reaction diastereoselective. The less substituted end of the oxyallyl cation was found to react nearly two times faster than the more substituted end.

Tetrahedron Letters published new progress about 56970-78-6. 56970-78-6 belongs to bromides-buliding-blocks, auxiliary class Bromide,Carboxylic acid,Aliphatic hydrocarbon chain,Inhibitor, name is 3-Bromo-2-methylpropanoic acid, and the molecular formula is C8H5IO, Recommanded Product: 3-Bromo-2-methylpropanoic acid.

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

Sabbaghan, Maryam published the artcileThe effect of aromatic and non-aromatic ionic liquids on the optical nonlinearity responses of porphyrins, Synthetic Route of 111-83-1, the publication is Journal of Molecular Liquids (2022), 118398, database is CAplus.

The effects of adding aromatic and nonaromatic ionic liquids (ILs) on third-order nonlinear optical (NLO) responses of 5,10,15,20-Tetrakis(4-methoxycarbonylphenyl) porphyrin (S1) and [5,10,15,20-Tetrakis(4-methoxycarbonylphenyl)-porphyrin]-Co (II) (S2) at 532 nm were investigated using the Z-scan technique. ILs show negligible nonlinear response in compare with porphyrins. A significant increase in NLO response with adding DABCO-based IL to S1 was observed which approx. equal to Cobalt(II) ion substitution at the core of porphyrin structure. The obtained value of nonlinear absorption coefficient β (cm/W) and the nonlinear refractive index n₂ (cm²/W), are of the order of 10^-4 and 10^-8, resp. The pos. synergetic effects were interpreted for enhanced nonlinear optical response by adding imidazolium-based IL and Cobalt(II) ion substitution at the core of porphyrin structure. Using ILs as additive led to excellent nonlinear properties which implies their promising applications in the optical devices.

Journal of Molecular Liquids published new progress about 111-83-1. 111-83-1 belongs to bromides-buliding-blocks, auxiliary class Bromide,Aliphatic hydrocarbon chain, name is 1-Bromooctane, and the molecular formula is C8H17Br, Synthetic Route of 111-83-1.

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

Nachtergaele, Sigrid published the artcileOxysterols are allosteric activators of the oncoprotein Smoothened, SDS of cas: 69361-41-7, the publication is Nature Chemical Biology (2012), 8(2), 211-220, database is CAplus and MEDLINE.

Oxysterols are a class of endogenous signaling mols. that can activate the Hedgehog pathway, which has critical roles in development, regeneration and cancer. However, it has been unclear how oxysterols influence Hedgehog signaling, including whether their effects are mediated through a protein target or indirectly through effects on membrane properties. To answer this question, we synthesized the enantiomer and an epimer of the most potent oxysterol, 20(S)-hydroxycholesterol. Using these mols., we show that the effects of oxysterols on Hedgehog signaling are exquisitely stereoselective, consistent with the hypothesis that they function through a specific protein target. We present several lines of evidence that this protein target is the seven-pass transmembrane protein Smoothened (Smo), a major drug target in oncol. Our work suggests that these enigmatic sterols, which have multiple effects on cell physiol., may act as ligands for signaling receptors and provides a generally applicable framework for probing sterol signaling mechanisms.

Nature Chemical Biology published new progress about 69361-41-7. 69361-41-7 belongs to bromides-buliding-blocks, auxiliary class PROTAC Linker,Aliphatic Linker, name is (4-Bromobut-1-yn-1-yl)trimethylsilane, and the molecular formula is C7H13BrSi, SDS of cas: 69361-41-7.

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

Negoro, Toshiyuki published the artcileNovel, Highly Potent Aldose Reductase Inhibitors: (R)-(-)-2-(4-Bromo-2-fluorobenzyl)-1,2,3,4-tetrahydropyrrolo[1,2-a]pyrazine- 4-spiro-3′-pyrrolidine-1,2′,3,5′-tetrone (AS-3201) and Its Congeners, COA of Formula: C7H8BrClFN, the publication is Journal of Medicinal Chemistry (1998), 41(21), 4118-4129, database is CAplus and MEDLINE.

A series of novel tetrahydropyrrolo[1,2-a]pyrazine derivatives were synthesized and evaluated as aldose reductase inhibitors on the basis of their abilities to inhibit porcine lens aldose reductase in vitro and to inhibit sorbitol accumulation in the sciatic nerve of streptozotocin-induced diabetic rats in vivo. Of these compounds, spirosuccinimide-fused tetrahydropyrrolo[1,2-a]pyrazine-1,3-dione derivatives showed significantly potent aldose reductase inhibitory activity. In the in vivo activity of these derivatives, 2-(4-bromo-2-fluorobenzyl)-1,2,3,4-tetrahydropyrrolo[1,2-a]pyrazine-4-spiro-3′-pyrrolidine-1,2′,3,5′-tetrone (I) (SX-3030) showed the best oral activity. The enantiomers of I were synthesized, and the biol. activities were evaluated. It was found that aldose reductase inhibitory activity resides in the (-)-I (AS-3201), which was 10 times more potent in inhibition of the aldose reductase (IC₅₀ = 1.5 × 10^-8 M) and 500 times more potent in the in vivo activity (ED₅₀ = 0.18 mg/kg/day for 5 days) than the corresponding (+)-I (SX-3202). From these results, AS-3201 was selected as the candidate for clin. development. The absolute configuration of AS-3201 was also established to be (R)-form by single-crystal X-ray anal. In this article we report the preparation and structure-activity relationship of tetrahydropyrrolopyrazine derivatives including a novel aldose reductase inhibitor, AS-3201.

Journal of Medicinal 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, COA of Formula: C7H8BrClFN.

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

Tamaoku, Katsumi published the artcileNew water-soluble hydrogen donors for the enzymatic spectrophotometric determination of hydrogen peroxide, Product Details of C3H6BrNaO3S, the publication is Analytica Chimica Acta (1982), 121-7, database is CAplus.

Eight N-alkyl-N-sulfopropylaniline derivatives were synthesized and assessed as water-soluble H donors for the spectrophotometric determination of H₂O₂ in the presence of peroxidase. The Na salts of N-ethyl-N-sulfopropylaniline (I), N-ethyl-N-sulfopropyl-m-toluidine (II), and N-ethyl-N-sulfopropyl-m-anisidine (III) are recommended. They have excellent water solubilities, and the optimum pH range for oxidative condensation with 4-aminoantipyrine in the presence of H₂O₂ and peroxidase is 5.5-9.5. The absorbances of the resulting chromogens are 2-3-fold higher than that achieved with PhOH. The molar absorptivities of the chromogens with 4-aminoantipyrine are 41,300 (I, γ_max 561 nm), 37,400 (II, γ_max 550 nm) and 27,900 (III, γ_max 540 nm). Calibration graphs for the determination of H₂O₂ in the presence of a control serum are linear for 7-40 × 10^-6 mol H₂O₂/L.

Analytica Chimica Acta 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 C13H16O2, Product Details of C3H6BrNaO3S.

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

Miura, Yozo published the artcileNew Method for the Synthesis of N-tert-Alkoxyarylaminyl Radicals, Category: bromides-buliding-blocks, the publication is Journal of Organic Chemistry (2006), 71(13), 4786-4794, database is CAplus and MEDLINE.

The reactions of 2,4-diaryl-6-tert-butylnitrosobenzenes with 2,2′-azobis[2-(methoxycarbonyl)propane] (5a), 2,2′-azobis(2-cyano-4-methylpentane) (5b), and 2,2′-azobis(2-cyano-4-methyl-4-methoxypentane) (5c) in refluxing benzene gave stable N-tert-alkoxy-2,4-diaryl-6-tert-butylphenylaminyls, which were successfully isolated as radical crystals in 13-52% yields after column chromatog. The radical yields depended on the reaction time and the molar ratio of azo compounds to nitroso compounds In the same manner, acetyl- and cyano-group-carrying N-tert-alkoxyarylaminyls were generated by the reaction of 2-phenyl-4-(4-acetylphenyl)-6-tert-butylnitrosobenzene and 2-phenyl-4-(4-cyanophenyl)-6-tert-butylnitrosobenzene with 5a and 5b, and they were isolated as radical crystals. X-ray crystallog. analyses were performed for two radicals, and their mol. structures were discussed. The magnetic properties were measured for the two isolated radicals with SQUID in the temperature range 1.8-300 K. One radical showed a weak ferromagnetic interaction (θ = 0.2 K) between the radicals, and the other showed a weak antiferromagnetic interaction (θ = -3.8 K). The ferromagnetic interaction was analyzed based on the x-ray crystallog. structure.

Journal of Organic Chemistry published new progress about 111865-47-5. 111865-47-5 belongs to bromides-buliding-blocks, auxiliary class Benzenes, name is Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, and the molecular formula is C10H16Br3N, Category: bromides-buliding-blocks.

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

Kolundzic, Filip published the artcileA Cyclization-Rearrangement Cascade for the Synthesis of Structurally Complex Chiral Gold(I)-Aminocarbene Complexes, SDS of cas: 69361-41-7, the publication is Angewandte Chemie, International Edition (2014), 53(31), 8122-8126, database is CAplus and MEDLINE.

A facile synthesis of chiral cyclic alkyl aminocarbene-Au(I) complexes from Au-free 1,7-enyne substrates was developed. The novel cyclization-rearrangement reaction sequence is triggered by the addition of (Me₂S)AuCl to different 1,7-enynes and leads to structurally unique carbene-Au(I) complexes in high yields. These novel complexes are catalytically active and inhibit the proliferation of different human cancer cell lines.

Angewandte Chemie, International Edition published new progress about 69361-41-7. 69361-41-7 belongs to bromides-buliding-blocks, auxiliary class PROTAC Linker,Aliphatic Linker, name is (4-Bromobut-1-yn-1-yl)trimethylsilane, and the molecular formula is C7H13BrSi, SDS of cas: 69361-41-7.

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