Category: chlorides-buliding-blocks

Pola, R. published the artcileThe pH-dependent and enzymatic release of cytarabine from hydrophilic polymer conjugates, HPLC of Formula: 42074-68-0, the publication is Physiological Research (Prague, Czech Republic) (2016), 65(Suppl. 2), S225-S232, database is CAplus.

Cytarabine is one of the most efficient drugs in the treatment of hematol. malignancies. In this work, we describe the synthesis and characterization of two different polymer conjugates of cytarabine that were designed for the controlled release of cytarabine within the leukemia cells. Reactive copolymers of N-(2-hydroxypropyl)methacrylamide (HPMA) and 3-(3-methacrylamidopropa-noyl)thiazolidine-2-thione) or 3-(N-methacryloylglycyl-phenylalanylleucylglycyl)thiazolidine-2-thione were used in the study as reactive polymer precursors for reaction with cytarabine. The enzymic release of cytarabine from the conjugate containing a GFLG spacer utilizing cathepsin B was verified. In addition to enzymolysis, the pH-dependent hydrolysis of cytarabine from both copolymers was also confirmed. Approx. 40 % and 20 % of the drug was released by spontaneous hydrolysis at pH 7.4 within 72 h from the polymer conjugates with the GFLG and beta-Ala spacers, resp. At pH 6.0, the spontaneous hydrolysis slowed down, and less than 10 % of the drug was liberated within 72 h. The results of the cytotoxicity evaluation of the polymer conjugates in vitro against various cell lines showed that the cytotoxicity of the polymer conjugates is approx. three times lower in comparison to free cytarabine.

Physiological Research (Prague, Czech Republic) published new progress about 42074-68-0. 42074-68-0 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 2-Chlorotrityl chloride, and the molecular formula is C19H14Cl2, HPLC of Formula: 42074-68-0.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Van de Pas, Bram A. published the artcileEnergy yield of respiration on chloroaromatic compounds in Desulfitobacterium dehalogenans, Category: chlorides-buliding-blocks, the publication is Applied and Environmental Microbiology (2001), 67(9), 3958-3963, database is CAplus and MEDLINE.

The amount of energy that can be conserved via halorespiration by Desulfitobacterium dehalogenans JW/IU-DC1 was determined by comparison of the growth yields of cells grown with 3-chloro-4-hydroxyphenyl acetate (Cl-OHPA) and different electron donors. Cultures that were grown with lactate, pyruvate, formate, or hydrogen as an electron donor and Cl-OHPA as an electron acceptor yielded 3.1, 6.6, 1.6, and 1.6 g (dry weight) per mol of reduction equivalent, resp. Fermentative growth on pyruvate yielded 14 g (dry weight) per mol of pyruvate oxidized. Pyruvate was not fermented stoichiometrically to acetate and lactate, but an excess of acetate was produced. Experiments with ¹³C-labeled bicarbonate showed that during pyruvate fermentation, approx. 9% of the acetate was formed from the reduction of CO₂. Comparison of the growth yields suggests that 1 mol of ATP is produced per mol of acetate produced by substrate-level phosphorylation and that there is no contribution of electron transport phosphorylation when D. dehalogenans grows on lactate plus Cl-OHPA or pyruvate plus Cl-OHPA. Furthermore, the growth yields indicate that approx. 1/3 mol of ATP is conserved per mol of Cl-OHPA reduced in cultures grown in formate plus Cl-OHPA and hydrogen plus Cl-OHPA. Because neither formate nor hydrogen nor Cl-OHPA supports substrate-level phosphorylation, energy must be conserved through the establishment of a protonmotive force. Pyruvate ferredoxin oxidoreductase, lactate dehydrogenase, formate dehydrogenase, and hydrogenase were localized by in vitro assays with membrane-impermeable electron acceptors and donors. The orientation of chlorophenol-reductive dehalogenase in the cytoplasmic membrane, however, could not be determined A model is proposed, which may explain the topol. analyses as well as the results obtained in the yield study.

Applied and Environmental Microbiology published new progress about 33697-81-3. 33697-81-3 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Carboxylic acid,Benzene,Phenol, name is 3-Chloro-4-hydroxyphenylacetic acid, and the molecular formula is C4H6BrFO2, Category: chlorides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Darses, Benjamin published the artcileAsymmetric synthesis of amines through rhodium-catalyzed C-H amination with sulfonimidoylnitrenes, Quality Control of 7080-50-4, the publication is Synthesis (2013), 45(15), 2079-2087, database is CAplus.

An efficient asym. C-H amination of benzylic and allylic substrates, as well as of adamantane derivatives, through catalytic C-H insertion of a chiral nitrene is reported. The reaction involves a chiral rhodium(II) complex, an iodine(III) oxidant, and a sulfonimidamide as a nitrene precursor. Exptl. protocols for the preparation of the reagents and the catalytic nitrene are provided. The C-H amination can provide the corresponding amino derivatives on a gram scale. Various methods for the cleavage of the sulfonimidoyl group to give the corresponding tert-butoxycarbonyl- or acetyl-protected optically pure amines are also described.

Synthesis published new progress about 7080-50-4. 7080-50-4 belongs to chlorides-buliding-blocks, auxiliary class Halogenation Reagent,Inhibitor, name is Sodium chloro(tosyl)amide trihydrate, and the molecular formula is C7H13ClNNaO5S, Quality Control of 7080-50-4.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Reemtsma, T. published the artcilePotential of ethyl acetate in the determination of extractable organic halogens (EOX) from contaminated soil, sediment, and sewage sludge, Formula: C8H7ClO3, the publication is Chemosphere (1996), 32(5), 815-26, database is CAplus.

The potential of Me tert-Bu ether, toluene and Et acetate for determining extractable organic halogens (EOX) from contaminated soil, lake sediments and sewage sludge was studied and compared with hexane, which is prescribed in the German standard method of EOX determination Soxhlet-extraction with Et acetate proved most efficient and yielded 2-6 times the EOX-values obtained by hexane. Washing of Et acetate extracts is not necessary, since interferences by coextd. inorganic halides was negligible if dried samples are extracted The detection limit is at 0.1-0.2 μg g^-1 with standard deviations between 3-7%. The method was further evaluated by application onto soil samples spiked with 3-chloro-4-hydroxy-phenylacetic acid (I) and phosphoric acid-tris-(2-chloroethyl) ester (II). Et acetate recoveries were 45-52% for I and 77-110% for II, compared with 6-13% recovery by hexane. Et acetate extraction substantially improves the EOX-determination but it might still underestimate the true value. For all sewage sludge, soil and sediment samples the EOX/EOM (extractable organic matter) ratio did also increase using Et acetate. This indicates the importance of polar halogenated contaminants which are amenable by Et acetate extraction rather than by hexane. The implications of EOX/EOM ratios for EOX dynamics are discussed.

Chemosphere published new progress about 33697-81-3. 33697-81-3 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Carboxylic acid,Benzene,Phenol, name is 3-Chloro-4-hydroxyphenylacetic acid, and the molecular formula is C8H7ClO3, Formula: C8H7ClO3.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Schwarze, Benedikt published the artcile2,2′-Bipyridine-Modified Tamoxifen: A Versatile Vector for Molybdacarboranes, Computed Properties of 6313-54-8, the publication is ChemMedChem (2019), 14(24), 2075-2083, database is CAplus and MEDLINE.

Investigations on the antitumor activity of metallacarboranes are sparse in the literature and limited to a handful of ruthena- and molybdacarboranes. In this study, the molybdacarborane fragment [3-(CO)₂-closo-3,1,2-MoC₂B₉H₁₁] was combined with a vector mol., inspired by the well-known drug tamoxifen or 4,4′-dihydroxytamoxifen (TAM-diOH). The molybdacarborane derivative [3,3-{4-[1,1-bis(4-hydroxyphenyl)but-1-en-2-yl]-2,2′-bipyridine-κ²N,N′}-3-(CO)₂-closo-3,1,2-MoC₂B₉H₁₁] (10), as well as the ligand itself 4-[1,1-bis(4-hydroxyphenyl)but-1-en-2-yl]-2,2′-bipyridine (6) showed cytotoxic activities in the low micromolar range against breast adenocarcinoma (MDA-MB-231, MDA-MB-361 and MCF-7), human glioblastoma (LN-229) and human glioma (U-251) cell lines. In addition, compounds 6 and 10 were found to induce senescence and cytodestructive autophagy, lower ROS/RNS levels, but only the molybdacarborane 10 induced a strong increase of nitric oxide (NO) concentration in the MCF-7 cells.

ChemMedChem published new progress about 6313-54-8. 6313-54-8 belongs to chlorides-buliding-blocks, auxiliary class Pyridine,Chloride,Carboxylic acid, name is 2-Chloroisonicotinic acid, and the molecular formula is C12H13NO3, Computed Properties of 6313-54-8.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Kitamura, Seiya published the artcileRational Design of Potent and Selective Inhibitors of an Epoxide Hydrolase Virulence Factor from Pseudomonas aeruginosa, Computed Properties of 350-30-1, the publication is Journal of Medicinal Chemistry (2016), 59(10), 4790-4799, database is CAplus and MEDLINE.

The virulence factor cystic fibrosis transmembrane conductance regulator (CFTR) inhibitory factor (Cif) is secreted by Pseudomonas aeruginosa and is the founding member of a distinct class of epoxide hydrolases (EHs) that triggers the catalysis-dependent degradation of the CFTR. We describe here the development of a series of potent and selective Cif inhibitors by structure-based drug design. Initial screening revealed 1a (KB2115), a thyroid hormone analog, as a lead compound with low micromolar potency. Structural requirements for potency were systematically probed, and interactions between Cif and 1a were characterized by X-ray crystallog. On the basis of these data, new compounds were designed to yield addnl. hydrogen bonding with residues of the Cif active site. From this effort, three compounds were identified that are 10-fold more potent toward Cif than our first-generation inhibitors and have no detectable thyroid hormone-like activity. These inhibitors will be useful tools to study the pathol. role of Cif and have the potential for clin. application.

Journal of Medicinal Chemistry published new progress about 350-30-1. 350-30-1 belongs to chlorides-buliding-blocks, auxiliary class Fluoride,Chloride,Nitro Compound,Benzene, name is 3-Chloro-4-fluoronitrobenzene, and the molecular formula is C6H3ClFNO2, Computed Properties of 350-30-1.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Lee, Koo published the artcileStructural modification of an orally active thrombin inhibitor, LB30057: replacement of the D-pocket-binding naphthyl moiety, Name: 5,6,7,8-Tetrahydronaphthalene-2-sulfonyl chloride, the publication is Bioorganic & Medicinal Chemistry (1998), 6(6), 869-876, database is CAplus and MEDLINE.

Amidrazonophenylalanine derivative LB30057 (I) was identified as a potent (K_i=0.38 nM), selective, and orally active thrombin inhibitor. As a continuation of studies into benzamidrazone-based thrombin inhibitors, we have structurally modified I by replacing the naphthyl group with a variety of hydrophobic moieties. This study led to discovery of several compounds with significantly enhanced potency in thrombin inhibition without sacrificing selectivity against trypsin and oral absorption. The highest activity was obtained with benzocycloheptyl derivative II (K_i = 0.045 nM).

Bioorganic & Medicinal Chemistry published new progress about 61551-49-3. 61551-49-3 belongs to chlorides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 5,6,7,8-Tetrahydronaphthalene-2-sulfonyl chloride, and the molecular formula is C10H11ClO2S, Name: 5,6,7,8-Tetrahydronaphthalene-2-sulfonyl chloride.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Nagiyev, Kh. D. published the artcileSpectrophotometric study of multi-ligand titanium (IV) complexes, Synthetic Route of 38146-42-8, the publication is Izvestiya Vysshikh Uchebnykh Zavedenii, Khimiya i Khimicheskaya Tekhnologiya (2003), 46(7), 94-97, database is CAplus.

The formation of titanium (IV) complexes with 2,3,4-trihydroxy-4′-sulfoazobenzene in the presence and absence of 3rd components, such as tri-Ph guanidine, bathophenanthroline, and decamethoxine, has been studied spectrophotometrically. The optimum conditions for the formation of binary and multi-ligand complexes have been found. The influence of pH, temperature, and time, reagent concentration, and the concentration of the 3rd component on the complexation reaction has been studied. Techniques of the photometric determination of titanium microquantities have been developed. These were approved by analyzing titanium in aluminum alloys M207-4 and M-207-5.

Izvestiya Vysshikh Uchebnykh Zavedenii, Khimiya i Khimicheskaya Tekhnologiya published new progress about 38146-42-8. 38146-42-8 belongs to chlorides-buliding-blocks, auxiliary class Achiral Phase-Transfer Catalysts, name is N1,N10-Bis(2-((2-isopropyl-5-methylcyclohexyl)oxy)-2-oxoethyl)-N1,N1,N10,N10-tetramethyldecane-1,10-diaminium chloride, and the molecular formula is C38H74Cl2N2O4, Synthetic Route of 38146-42-8.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Smith, Catherine J. published the artcileFlow and batch mode focused microwave synthesis of 5-amino-4-cyanopyrazoles and their further conversion to 4-aminopyrazolopyrimidines, Safety of 1-(2-Chloro-5-(trifluoromethyl)phenyl)hydrazine, the publication is Organic & Biomolecular Chemistry (2007), 5(17), 2758-2761, database is CAplus and MEDLINE.

A flow apparatus for microwave irradiation is constructed; the apparatus is used for the reactions of (ethoxymethylene)malononitrile with hydrazines RNHNH₂ (R = H, Me, Ph, 4-ClC₆H₄, 4-O₂NC₆H₄, 2-F₃CC₆H₄, 3-Cl-4-MeC₆H₃, 2,5-Cl₂C₆H₃, 4-FC₆H₄, 4-MeOC₆H₄, 4-HO₂CC₆H₄, 3-Cl-4-FC₆H₃, 2-Cl-5-F₃CC₆H₃, 2-pyridinyl) under microwave irradiation to give aminopyrazolecarbonitriles I (R = H, Me, Ph, 4-ClC₆H₄, 4-O₂NC₆H₄, 2-F₃CC₆H₄, 3-Cl-4-MeC₆H₃, 2,5-Cl₂C₆H₃, 4-FC₆H₄, 4-MeOC₆H₄, 4-HO₂CC₆H₄, 3-Cl-4-FC₆H₃, 2-Cl-5-F₃CC₆H₃, 2-pyridinyl) in 62-96% yields and in 90->95% purities (all but one in >95% purity). Microwave irradiation of hydrazines RNHNH₂ (R = H, Me, Ph, 4-ClC₆H₄, 4-O₂NC₆H₄, 2-F₃CC₆H₄, 3-Cl-4-MeC₆H₃, 2,5-Cl₂C₆H₃, 4-FC₆H₄, 4-MeOC₆H₄, 4-HO₂CC₆H₄, 3-Cl-4-FC₆H₃, 2-Cl-5-F₃CC₆H₃, 2-pyridinyl) with (ethoxymethylene)malononitrile using the described flow apparatus followed by flow of the mixture through a column of resin-bound benzylamine and a column of activated carbon provides I (R = H, Me, Ph, 4-ClC₆H₄, 4-O₂NC₆H₄, 2-F₃CC₆H₄, 3-Cl-4-MeC₆H₃, 2,5-Cl₂C₆H₃, 4-FC₆H₄, 4-MeOC₆H₄, 4-HO₂CC₆H₄, 3-Cl-4-FC₆H₃, 2-Cl-5-F₃CC₆H₃, 2-pyridinyl) in 62-91% yields and >95% purities; I (R = 4-HO₂CC₆H₄) could not be purified using the resin-bound benzylamine column and is isolated in 96% yield and 90% purity. This method is used to prepare >250 g of I (R = 4-HO₂CC₆H₄). I (R = Me, Ph, 4-ClC₆H₄, 2-F₃CC₆H₄, 3-Cl-4-MeC₆H₃, 2,5-Cl₂C₆H₃, 4-FC₆H₄, 4-MeOC₆H₄, 2-Cl-5-F₃CC₆H₃, 2-pyridinyl) undergo cyclocondensation and dimerization under microwave irradiation with potassium tert-butoxide in toluene at 160° to give the pyrazolylpyrazolopyrimidines II (R = Me, Ph, 4-ClC₆H₄, 2-F₃CC₆H₄, 3-Cl-4-MeC₆H₃, 2,5-Cl₂C₆H₃, 4-FC₆H₄, 4-MeOC₆H₄, 2-Cl-5-F₃CC₆H₃, 2-pyridinyl) in 28-82% yields; the products are purified by stirring with Amberlyst 15 in DMF followed by stirring of the resin with triethylamine in DMF. I (R = H) reacts with nitriles R¹CN (R¹ = Ph, 3-BrC₆H₄, 2-pyridinyl) under microwave irradiation with potassium tert-butoxide in toluene at 160° to give pyrazolopyrimidines III (R¹ = Ph, 3-BrC₆H₄, 2-pyridinyl) in 88-94% yields.

Organic & Biomolecular Chemistry published new progress about 1869-22-3. 1869-22-3 belongs to chlorides-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Chloride,Hydrazine,Amine,Benzene, name is 1-(2-Chloro-5-(trifluoromethyl)phenyl)hydrazine, and the molecular formula is C3H8N2S, Safety of 1-(2-Chloro-5-(trifluoromethyl)phenyl)hydrazine.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics

Nagao, Yoshimitsu published the artcileUtilization of sulfur-containing leaving group. 7. Highly selective nonenzymic chiral induction into 3-methylglutaric acid and cis-4-cyclohexen-1,2-ylenebis(acetic acid) utilizing a functional five-membered heterocycle 4(R)-MCTT, Related Products of chlorides-buliding-blocks, the publication is Journal of Organic Chemistry (1985), 50(21), 4072-80, database is CAplus.

Diamide I, prepared by treatment of 3-methylglutaric acid with 4(R)-(methoxycarbonyl)-1,3-thiazolidine-2-thione [4(R)-MCTT] in the presence of DCC in pyridine, was subjected to aminolysis with 1 equiv of piperidine in CH₂Cl₂ at -30° to give a mixture of diastereomers II [R₂N = piperidino, R¹₂N = MCTT moiety (III)] and II (R₂N = MCTT moiety, R¹₂N = piperidino) in a 88:12 ratio. III was separated by silica gel column chromatog. and treated with various nucleophiles to give optically pure bifunctional synthons (II; R₂N and R¹₂N = nucleophilic group) in high yields. Highly selective chiral induction into cis-4-cyclohexen-1,2-ylenebis(acetic acid) was also performed. Aminolysis of IV (R₂N and R¹₂N = MCTT moiety) (V) with 1 equiv of piperidine gave 94% diastereomer IV (R₂N = piperidino, R¹₂N = MCTT moiety). Similar chiral induction into cis-cyclohexan-1,2-xylenebis(acetic acid) and aminolysis of its 4(R)-MCTT diamide (VI) with piperidine were also carried out; opposite selectivity was obtained. The conformations of V and VI in a solvent, the relationship between the susceptibility of their conformations and environmental temperature, and the diastereoselectivity of the reaction are discussed on the basis of the 400-MHz ¹H NMR spectra.

Journal of Organic Chemistry published new progress about 5034-06-0. 5034-06-0 belongs to chlorides-buliding-blocks, auxiliary class Salt,Aliphatic hydrocarbon chain, name is trimethyloxosulphonium chloride, and the molecular formula is C3H9ClOS, Related Products of chlorides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics