Category: bromides-buliding-blocks

Muramoto, Yokichi published the artcileEthyl 3-oxoglutarate derivatives. III. Synthesis of long chain oxodicarboxylic esters from ethyl 3-oxoglutarate, Application of Ethyl 10-bromodecanoate, the main research area is glutarate oxo alkylation haloester; alkylation oxoglutarate haloester; oxoalkanedioate dialkyl; carboxylic diester aliphatic oxo.

The monoanion of the Mg chelate prepared from Et 3-oxoglutarate (I) and Mg(OEt)2 was alkylated with a haloester to give a monoalkylated derivative A second alkylation with a different haloester in the presence of NaOEt followed by decarboxylative hydrolysis and esterification gave an unsymmetrical long chain oxodicarboxylic ester, such as di-Et 5-oxoheptadecanedioate, di-Me 6-methyl-8-oxopentadecanedioate di-Et 6-methyl-4-oxopentadecanedioate, or di-Et 2-methyl-4-oxopentadecanedioate. Moreover, di-Et 8-oxopentadecanedioate was obtained by the alkylation of I with Et 6-bromohexanoate in the presence of NaOEt alone as a catalyst. These esters appear suitable for cyclization to macrocyclic ketones.

Agricultural and Biological Chemistry published new progress about Esters. 55099-31-5 belongs to class bromides-buliding-blocks, name is Ethyl 10-bromodecanoate, and the molecular formula is C12H23BrO2, Application of Ethyl 10-bromodecanoate.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Satpati, Drishty published the artcilePreparation and Evaluation of 99mTc(CO)3-Labeled Pentadecanoic Acid Derivative and Its Suspension in Lipiodol, Application of 15-Bromopentadecanoic acid, the main research area is bromopentadecanoic acid lipiodol stability.

Transarterial embolization by the intra-arterial administration of 131I-lipiodol is a modality used in the treatment of liver cancer. Long-chain fatty acids, being highly lipophilic, are also known to localize in the liver, thus constituting favorable vectors for this modality of treatment. Toward this, we envisaged the derivatization of 15-bromopentadecanoic acid, rendering it suitable for incorporation of a tridentate chelating moiety, for radiolabeling with the [99mTc(CO)3(H2O)3]+ precursor. The complex prepared, being lipophilic, was expected to behave as a lipiodol surrogate. The radiolabeled complex could be obtained in >95% radiochem. yield, as characterized by high-performance liquid chromatog. The i.v. injection of the radiolabeled complex in mice resulted in 23.5% ± 4.3% uptake of injected dose (ID) organ in the liver at 3 h postinjection. However, the uptake of the lipiodol suspension of the complex at 3 h postinjection in the liver was found to be 43.8 ± 13.4% ID/organ, when injected via the portal vein.

Cancer Biotherapy and Radiopharmaceuticals published new progress about Blood. 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, Application of 15-Bromopentadecanoic acid.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Wang, Fan published the artcileAn Improved and Economical Process for the Manufacture of the Key Intermediate of Aliskiren, a New Potent Renin Inhibitor, Computed Properties of 172900-69-5, the main research area is aliskiren intermediate preparation; aminomethoxymethoxypropoxybenzylmethylhexanoic acid preparation; lhexanoic acid aminomethoxymethoxypropoxybenzylmethyl preparation.

An improved, practical, economical and efficient process for the production of (2S,4S)-2-amino-4-(4-methoxy-3-(3-methoxypropoxy)benzyl)-5-methylhexanoic acid, a key intermediate of the new potent renin inhibitor of aliskiren, in a total yield over 30% is described. This process avoids expensive reagents and chromatog. purifications, and is easily scaled up in industry.

Organic Process Research & Development published new progress about aliskiren intermediate preparation; aminomethoxymethoxypropoxybenzylmethylhexanoic acid preparation; lhexanoic acid aminomethoxymethoxypropoxybenzylmethyl preparation. 172900-69-5 belongs to class bromides-buliding-blocks, name is 2-(3-Methoxypropoxy)-4-((R)-2-(bromomethyl)-3-methylbutyl)-1-methoxybenzene, and the molecular formula is C17H27BrO3, Computed Properties of 172900-69-5.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Choi, P. published the artcileConversion of 3-azido-5-phenyl-1,2,4-oxadiazole into benzoyl cyanide; a new thermal fragmentation, Recommanded Product: 3-Bromo-5-phenyl-1,2,4-oxadiazole, the main research area is azidophenyloxadiazole preparation thermal decomposition; oxadiazole azido phenyl preparation pyrolysis; benzoyl cyanide.

Flash vacuum pyrolysis at 550° of the title azide (I), prepared in 50% yield by heating the corresponding 3-bromo compound with KN3/18-crown-6 or LiN3 in anhydrous THF at 90°, gave 70% PhCOCN. The transformation is explained by conversion of the azide into its tetrazole tautomer and thence to a pentaazafulvene (II) by N-O bond cleavage. Loss of N2 gives BzNC which rearranges to PhCOCN.

Tetrahedron Letters published new progress about azidophenyloxadiazole preparation thermal decomposition; oxadiazole azido phenyl preparation pyrolysis; benzoyl cyanide. 23432-94-2 belongs to class bromides-buliding-blocks, name is 3-Bromo-5-phenyl-1,2,4-oxadiazole, and the molecular formula is C8H5BrN2O, Recommanded Product: 3-Bromo-5-phenyl-1,2,4-oxadiazole.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Baumgarth, Manfred published the artcileA concise and efficient synthesis of [2-methyl-5-methylsulfonyl-4-(pyrrol-1-yl)benzoyl]guanidinium methanesulfonate (eniporide), Computed Properties of 452-63-1, the main research area is eniporide preparation.

A new synthesis of the benzoylguanidine-type Na+/H+ antiporter inhibitor eniporide is described. Starting from 2-bromo-5-fluorotoluene, aromatic substituents were introduced by methanesulfonylation, Pd-catalyzed carboxylation with CO, and halogen-pyrrole exchange. Guanidine acylation was performed using Mukaiyama’s procedure.

European Journal of Organic Chemistry published new progress about eniporide preparation. 452-63-1 belongs to class bromides-buliding-blocks, name is 1-Bromo-4-fluoro-2-methylbenzene, and the molecular formula is C7H6BrF, Computed Properties of 452-63-1.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Das, Soumen published the artcileSynthesis and biodistribution studies of 99mTc labeled fatty acid derivatives prepared via “”Click approach”” for potential use in cardiac imaging, SDS of cas: 56523-59-2, the main research area is technetium 99m fatty acid derivative preparation cardiac imaging; 99mTc carbonyl core; click chemistry; fatty acid; myocardial imaging.

123I-Iodophenylpentadecanoic acid (IPPA) is a metabolic agent used in nuclear medicine for diagnosis of myocardial defects. Efforts are underway worldwide to develop a 99mTc substitute of the above radiopharmaceutical for the aforementioned application. Herein, we report synthesis and biodistribution studies of 99mTc labeled fatty acids (8, 11, and 15 carbons) obtained via “”click chem.”” for its potential use in myocardial imaging. ω-Bromo fatty acids (8C/11C/15C) were synthetically modified at bromo terminal to introduce a heterocyclic triazole with glycine sidearm in a five step procedure. Modified fatty acids were subsequently radiolabeled with preformed [99mTc(CO)3]+ synthon to yield the desired fatty acid complexes which were evaluated in Swiss mice. All the radiolabeled complexes were obtained with radiochem. purities >80%, as characterized by HPLC. Biodistribution studies of all three complexes in Swiss mice showed myocardial uptake of ∼6-9% ID/g at 2 min post-injection, close to*I-IPPA (∼9% ID/g). Complexes exhibited significant retention in the myocardium up to 30 min (∼1% ID/g) but were lower to the standard agent (∼7% ID/g). Similar uptake of activity in myocardium for the newly synthesized complexes in comparison to 125I-IPPA along with favorable in vivo pharmacokinetics merits potential for the present “”click”” design of complexes for myocardial imaging.

Journal of Labelled Compounds and Radiopharmaceuticals published new progress about Heart disease. 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, SDS of cas: 56523-59-2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Gonzalez, Alvaro published the artcileFormation of macrocyclic lactones in microemulsions, Synthetic Route of 56523-59-2, the main research area is microemulsion lactone preparation; emulsion micro lactone preparation; macrocyclic lactone preparation microemulsion; bromoalkanoic acid lactonization microemulsion; hydroxyalkanoic acid lactonization microemulsion.

Macrocyclic lactones were prepared by using the reactants in detergentless microemulsions. A microemulsion of H2O, Me2CHOH, and PhMe was made 8 × 10-3M in 4-MeC6H4SO3H and treated with an identical microemulsion 1 × 10-2M in Me(CH2)5CH(OH)(CH2)10CO2H, HO(CH2)14CO2H, or HO(CH2)15CO2H over 2 h and the mixture heated at 65° 12 h to give 18-23% lactones I (R = benzyl, n = 10; R = H, n = 14, 15), 35-40% the iso-Pr esters, and 20% polymers. The above microemulsion was made 3 × 10-3M in Br(CH2)mCO2H (m = 10, 14) and an equivalent KOH added to form the K salt. This solution was heated at 65° 1 day to give 25 and 22% I (R = H, n = 9, 13) and 18 and 15% polymers.

Journal of Organic Chemistry published new progress about Lactonization. 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, Synthetic Route of 56523-59-2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Tomoi, Masao published the artcilePolymer-supported bases, 4. Macrolide synthesis from ω-bromocarboxylic acids using polymer-supported 1,8-diazabicyclo[5.4.0]undec-7-ene, Synthetic Route of 56523-59-2, the main research area is macrolide synthesis polymer diazabicycloundecene; bromo carboxylic acid lactonization.

The macrolide yield in the title synthesis is a function of the degree of ring substitution and of crosslinking, which governs the effective concentration of the fixed substrate within the polymeric reagent. The effect of the polystyrene matrix on the macrolide yield in the heterogeneous system was compared with the corresponding homogeneous reaction.

Makromolekulare Chemie published new progress about Lactonization. 56523-59-2 belongs to class bromides-buliding-blocks, name is 15-Bromopentadecanoic acid, and the molecular formula is C15H29BrO2, Synthetic Route of 56523-59-2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Manchand, Percy S. published the artcileA convenient synthesis of 3,5-dimethoxy-4-methylbenzoic acid, Product Details of C9H8Br2O2, the main research area is benzoic acid dimethoxymethyl; bromination toluic acid; methoxylation methyldibromobenzoate.

4-MeC6H4CO2Me, prepared in 95% yield from 4-MeC6H4CO2H, was stirred with AlCl3 and Br at room temperature 30 min and then at 80-8° 1 h to give 65% 3,5,4-Br2MeC6H2CO2Me (I). Treating I in pyridine with NaOMe in the presence of CuCl gave 81% 3,5,4-(MeO)2MeC6H2CO2Me, which was hydrolyzed to the title acid.

Synthesis published new progress about Methoxylation. 74896-66-5 belongs to class bromides-buliding-blocks, name is Methyl 3,5-dibromo-4-methylbenzoate, and the molecular formula is C9H8Br2O2, Product Details of C9H8Br2O2.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Bektenova, G. A. published the artcileIonization constants of boronic acids and their complexation with diols, Related Products of bromides-buliding-blocks, the main research area is boronic acid ionization constant complexation diol.

Ionization constants of a number of boronic acids were determined spectrophotometrically in aqueous solutions The effect of different substituents on their acid properties is considered. The strongest acids are shown to be phenylboronic acid derivatives containing a nitro group. A model study of the interaction between boronic acids and polyvinyl alc. depending on pH is analyzed to reveal the optimum conditions for the formation of a stable boronate-diol complex.

Russian Journal of Physical Chemistry A published new progress about Absorptivity. 74386-13-3 belongs to class bromides-buliding-blocks, name is 4-Bromo-3-nitrophenylboronic acid, and the molecular formula is C6H5BBrNO4, Related Products of bromides-buliding-blocks.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary