Category: 59608-97-8

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Two [18F]fluoroalkyl substituted amino acids differing only by the presence or absence of a methyl group on the alpha-carbon, (S)-2-amino-7-[18F]fluoro-2-methylheptanoic acid ((S)-[18F]FAMHep, (S)-[18F]14) and (S)-2-amino-7-[18F]fluoroheptanoic acid ((S)-[18F]FAHep, (S)-[18F]15), were developed for brain tumor imaging and compared to the well-established system L amino acid tracer, O-(2-[18F]fluoroethyl)-l-tyrosine ([18F]FET), in the delayed brain tumor (DBT) mouse model of high-grade glioma. Cell uptake, biodistribution, and PET/CT imaging studies showed differences in amino acid transport of these tracer by DBT cells. Recognition of (S)-[18F]15 but not (S)-[18F]14 by system L amino acid transporters led to approximately 8-10-fold higher uptake of the alpha-hydrogen substituted analogue (S)-[18F]15 in normal brain. (S)-[18F]15 had imaging properties similar to those of (S)-[18F]FET in the DBT tumor model while (S)-[18F]14 afforded higher tumor to brain ratios due to much lower uptake by normal brain. These results have important implications for the future development of alpha-alkyl and alpha,alpha-dialkyl substituted amino acids for brain tumor imaging.

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Reference：
Thiazole | C3H4697NS – PubChem,
Thiazole | chemical compound | Britannica

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The synthesis, evaluation, and molecular modeling of a series of 18F-labeled 4-anilidopiperidines with high affinities for the mu-opioid receptor (mu-OR) are reported. On the basis of the high brain uptake and selective retention in brain regions that contain a high concentration of the mu-OR, combined with a good metabolic stability, [ 18F]fluoro-pentyl carfentanil ([18F]4) and 2-(±)[18F]-fluoropropyl-sufentanil ([18F]6) were selected as the lead compounds for further evaluation. The binding affinity to the human mu-OR was 0.74 and 0.13 nM for [18F]4 and [ 18F]6, respectively. In vitro autoradiography of [18F] 4 and [18F] 6 on rat brain sections produced patterns in accordance with the known distribution of mu-OR expression. Structure-activity relationships of the fluorinated compounds are discussed with respect to the interaction with an activated-state model of the mu-OR. Taken together, the in vivo and in vitro data indicate that [18F] 4 and [18F] 6 hold promise for studying the mu-opioid receptor in humans by means of positron emission tomography.

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Thiazole | C3H4698NS – PubChem,
Thiazole | chemical compound | Britannica

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Compounds of formula (I) wherein R1, R2, R3, R4 and R5 are as defined in the specification, processes for their production, their uses and pharmaceutical compositions containing them.

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Thiazole | C3H4722NS – PubChem,
Thiazole | chemical compound | Britannica

Application of 59608-97-8, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 59608-97-8, Name is 4-(Chloromethyl)thiazol-2-amine hydrochloride, molecular formula is C4H6Cl2N2S. In a Article，once mentioned of 59608-97-8

Synthetic cannabinoids (SC) are the largest class of new psychoactive substances (NPS), and are increasingly associated with serious adverse effects. The majority of SC NPS are 1,3-disubstituted indoles and indazoles featuring a diversity of subunits at the 1- and 3-positions. Most recently, cumyl-derived indole- and indazole-3-carboxamides have been detected by law enforcement agencies and by emergency departments. Herein we describe the synthesis, characterization, and pharmacology of SCs CUMYL-BICA, CUMYL-PICA, CUMYL-5F-PICA, CUMYL-PINACA, CUMYL-5F-PINACA, and related analogues. All cumyl-derived SCs were potent, efficacious agonists at CB1 (EC50 = 0.43-12.3 nM) and CB2 (EC50 = 11.3-122 nM) receptors in a fluorometric assay of membrane potential, with selectivity for CB1 activation (3.1-53 times over CB2). CUMYL-PICA and CUMYL-5F-PICA were evaluated in rats using biotelemetry, and induced hypothermia and bradycardia at doses of 1 mg/kg. Hypothermia was reversed by pretreatment with a CB1, but not CB2, antagonist, confirming that cumyl-derived SCs are cannabimimetic in vivo.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 59608-97-8 is helpful to your research., Application of 59608-97-8

Reference：
Thiazole | C3H4703NS – PubChem,
Thiazole | chemical compound | Britannica

In an article, published in an article, once mentioned the application of 59608-97-8, Name is 4-(Chloromethyl)thiazol-2-amine hydrochloride,molecular formula is C4H6Cl2N2S, is a conventional compound. this article was the specific content is as follows.Application In Synthesis of 4-(Chloromethyl)thiazol-2-amine hydrochloride

Synthetic cannabinoids, recently used as alternatives to Cannabis sativa, are among the most frequently abused drugs. Identified in 2014, the synthetic cannabinoids N-(1-amino-3-methyl-1-oxobutan-2-yl)-1-(5-fluoropentyl)-1H-indazole-3-carboxamide (5F-AB-PINACA) and methyl [1-(5-fluoropentyl)-1H-indazole-3-carbonyl]-valinate (5F-AMB) are carboxamides composed of 1-(5-fluoropentyl)-1H-indazole-3-carboxylic acid and valine amide/methyl ester. Because of their composition, these molecules have pairs of enantiomers derived from the chiral center of their amino acid structures. Previous studies on the identification of 5F-AB-PINACA and 5F-AMB did not consider the existence of enantiomers, and there have been no reports on the enantiopurities of synthetic cannabinoids. We synthesized both enantiomers of these compounds and then separated the enantiomers by liquid chromatography?high-resolution mass spectrometry using a column with a chiral stationary phase consisted with amylose tris (3-chloro-4-methylphenylcarbamate). Under the optimized conditions, the enantiomer resolutions were 2.2 and 2.3 for 5F-AB-PINACA and 5F-AMB, respectively. Analysis of 10 herbal samples containing 5F-AB-PINACA and one herbal sample containing 5F-AMB showed that they all contained the (S)-enantiomer, but the (R)-enantiomer was only detected in two samples and at a ratio of less than 20%.

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Reference：
Thiazole | C3H4702NS – PubChem,
Thiazole | chemical compound | Britannica

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 59608-97-8, Name is 4-(Chloromethyl)thiazol-2-amine hydrochloride, molecular formula is C4H6Cl2N2S. In a Article，once mentioned of 59608-97-8, Quality Control of: 4-(Chloromethyl)thiazol-2-amine hydrochloride

Reported is an asymmetric reductive dicarbofunctionalization of unactivated alkenes. Under the catalysis of a Ni/BOX system, various aryl bromides, incorporating a pendant olefinic unit, were successfully reacted with an array of primary alkyl bromides in the presence of Zn as a reductant, furnishing a series of benzene-fused cyclic compounds bearing a quaternary stereocenter in high enantioselectivities. Notably, this reaction avoids the use of pregenerated organometallics and demonstrates high tolerance of sensitive functionalities. The preliminary mechanistic investigations reveal that this Ni-catalyzed reaction proceeds as a cascade consisting of migratory insertion and cross-coupling with a nickel(I)-mediated intramolecular 5-exo cyclization as the enantiodetermining step.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Quality Control of: 4-(Chloromethyl)thiazol-2-amine hydrochloride. In my other articles, you can also check out more blogs about 59608-97-8

Reference：
Thiazole | C3H4706NS – PubChem,
Thiazole | chemical compound | Britannica

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.59608-97-8, Name is 4-(Chloromethyl)thiazol-2-amine hydrochloride, molecular formula is C4H6Cl2N2S. In a Article，once mentioned of 59608-97-8, HPLC of Formula: C4H6Cl2N2S

Recently, carboxamide-type synthetic cannabinoids have been distributed globally as new psychoactive substances (NPS). Some of these compounds possess asymmetric carbon, which is derived from an amide moiety composed of amino acid derivatives (i.e., amides or esters of amino acids). In this study, we synthesized both enantiomers of synthetic cannabinoids, N-(1-amino-3-methyl-1-oxobutan-2-yl)-1-(2-fluorobenzyl)-1H-indazole-3-carboxamide (AB-FUBINACA 2-fluorobenzyl isomer), N-(1-amino-1-oxo-3-phenylpropan-2-yl)-1-(cyclohexylmethyl)-1H-indazole-3-carboxamide (APP-CHMINACA), ethyl [1-(5-fluoropentyl)-1H-indazole-3-carbonyl]valinate (5F-EMB-PINACA), ethyl [1-(4-fluorobenzyl)-1H-indazole-3-carbonyl]valinate (EMB-FUBINACA), and methyl 2-[1-(4-fluorobenzyl)-1H-indole-3-carboxamido]-3,3-dimethylbutanoate (MDMB-FUBICA), which were reported as NPS found in Europe from 2014 to 2015, to evaluate their activities as CB1/CB2 receptor agonists. With the exception of (R) MDMB-FUBICA, all of the tested enantiomers were assumed to be agonists of both CB1 and CB2 receptors, and the EC50 values of the (S)-enantiomers for the CB1 receptors were about five times lower than those of (R)-enantiomers. (R) MDMB-FUBICA was shown to function as an agonist of the CB2 receptor, but lacks CB1 receptor activity. To the best of our knowledge, this is the first report to show that the (R)-enantiomers of the carboxamide-type synthetic cannabinoids have the potency to activate CB1 and CB2 receptors. The findings presented here shed light on the pharmacological properties of these carboxamide-type synthetic cannabinoids in forensic cases.

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Reference：
Thiazole | C3H4707NS – PubChem,
Thiazole | chemical compound | Britannica

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.59608-97-8, Name is 4-(Chloromethyl)thiazol-2-amine hydrochloride, molecular formula is C4H6Cl2N2S. In a Article，once mentioned of 59608-97-8, Recommanded Product: 4-(Chloromethyl)thiazol-2-amine hydrochloride

Coupling reactions involving non-sulfonated C-O electrophiles provide a promising method for forming C-C bonds, but the incorporation of functionalized or secondary alkyl groups remains a challenge due to the requirement for well-defined alkylmetal species. In this study, we report a reductive nickel-catalyzed cross-coupling of benzyl oxalates with alkyl bromides, using oxalate as a new leaving group. A broad range of highly functionalized alkyl units (such as functional groups: alkyl chloride, alcohol, aldehyde, amine, amide, boronate ester, ether, ester, heterocycle, phosphonate, strained ring) were efficiently incorporated at the benzylic position. The utility of this synthetic method was further demonstrated by late-stage modification of complex bioactive compounds. Preliminary mechanistic experiments revealed that a radical process might be involved in the reaction.

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Reference：
Thiazole | C3H4721NS – PubChem,
Thiazole | chemical compound | Britannica

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The 2-alkyl-2H-indazole regioisomers of synthetic cannabinoids AB-CHMINACA, AB-FUBINACA, AB-PINACA, and 5F-AB-PINACA are possible manufacturing impurities with cannabimimetic activities

Indazole-derived synthetic cannabinoids (SCs) featuring an alkyl substituent at the 1-position and l-valinamide at the 3-carboxamide position (e.g., AB-CHMINACA) have been identified by forensic chemists around the world, and are associated with serious adverse health effects. Regioisomerism is possible for indazole SCs, with the 2-alkyl-2H-indazole regioisomer of AB-CHMINACA recently identified in SC products in Japan. It is unknown whether this regiosiomer represents a manufacturing impurity arising as a synthetic byproduct, or was intentionally synthesized as a cannabimimetic agent. This study reports the synthesis, analytical characterization, and pharmacological evaluation of commonly encountered indazole SCs AB-CHMINACA, AB-FUBINACA, AB-PINACA, 5F-AB-PINACA and their corresponding 2-alkyl-2H-indazole regioisomers. Both regioisomers of each SC were prepared from a common precursor, and the physical properties, 1H and 13C nuclear magnetic resonance spectroscopy, gas chromatography?mass spectrometry, and ultraviolet?visible spectroscopy of all SC compounds are described. Additionally, AB-CHMINACA, AB-FUBINACA, AB-PINACA, and 5F-AB-PINACA were found to act as high potency agonists at CB1 (EC50 = 2.1?11.6 nM) and CB2 (EC50 = 5.6?21.1 nM) receptors in fluorometric assays, while the corresponding 2-alkyl-2H-indazole regioisomers demonstrated low potency (micromolar) agonist activities at both receptors. Taken together, these data suggest that 2-alkyl-2H-indazole regioisomers of AB-CHMINACA, AB-FUBINACA, AB-PINACA, and 5F-AB-PINACA are likely to be encountered by forensic chemists and toxicologists as the result of improper purification during the clandestine synthesis of 1-alkyl-1H-indazole regioisomers, and can be distinguished by differences in gas chromatography?mass spectrometry fragmentation pattern.

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Thiazole | C3H4717NS – PubChem,
Thiazole | chemical compound | Britannica

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.59608-97-8, Name is 4-(Chloromethyl)thiazol-2-amine hydrochloride, molecular formula is C4H6Cl2N2S. In a Patent£¬once mentioned of 59608-97-8, Safety of 4-(Chloromethyl)thiazol-2-amine hydrochloride

The present invention relates to a thrombin receptor antagonist containing a compound represented by the formula (I) wherein R1a, R1b and R2 are each a hydrogen atom, an optionally substituted hydrocarbon group, an optionally substituted heterocyclic group, or an optionally substituted alkoxy, R3 is a group represented by the formula -NHCOR4, -NHSO2R5, -NHCON(R6a) (R6b), -NHCOOR7 or -CONHR8 wherein R4, R5, R6a, R6b, R7 and R8 are each a hydrogen atom, an optionally substituted hydrocarbon group, an optionally substituted heterocyclic group and the like), ring A is monocyclic aromatic ring optionally further having substituent(s), R1a and R1b are optionally bonded to each other to form an optionally substituted nitrogen-containing non-aromatic heterocycle, or a salt thereof or a prodrug thereof. The thrombin receptor antagonist of the present invention has a thrombin receptor (particularly PAR-1) antagonistic action and is useful for the prophylaxis or treatment of PAR-1 mediated pathological condition or disease.

The present invention relates to a thrombin receptor antagonist containing a compound represented by the formula (I) wherein R1a, R1b and R2 are each a hydrogen atom, an optionally substituted hydrocarbon group, an optionally substituted heterocyclic group, or an optionally substituted alkoxy, R3 is a group represented by the formula -NHCOR4, -NHSO2R5, -NHCON(R6a) (R6b), -NHCOOR7 or -CONHR8 wherein R4, R5, R6a, R6b, R7 and R8 are each a hydrogen atom, an optionally substituted hydrocarbon group, an optionally substituted heterocyclic group and the like), ring A is monocyclic aromatic ring optionally further having substituent(s), R1a and R1b are optionally bonded to each other to form an optionally substituted nitrogen-containing non-aromatic heterocycle, or a salt thereof or a prodrug thereof. The thrombin receptor antagonist of the present invention has a thrombin receptor (particularly PAR-1) antagonistic action and is useful for the prophylaxis or treatment of PAR-1 mediated pathological condition or disease.

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Reference£º
Thiazole | C3H4699NS – PubChem,
Thiazole | chemical compound | Britannica