Category: 20375-65-9

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Two new analogs of the releasing factor of the luteinizing hormone with shortened amino acid sequences have been synthesized by the methods of classical peptide chemistry.The influence of the preparations on the action of chorionic gonadotropin and on the course of processes of ovulation in experimental animals has been studied.The promising nature in this direction of the search for active analogs of luliberin has been shown.

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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N2601 – PubChem

Application of 20375-65-9, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.20375-65-9, Name is 3-Phenyl-6-chloropyridazine, molecular formula is C10H7ClN2. In a Article，once mentioned of 20375-65-9

The use of hydrolases in organic chemistry: synthesis of amide and ester bonds catalyzed by industrial papain.Industrial papain, which is readily available, catalyzed the synthesis of L-Z-alanine ethyl ester (L-ZAEt) in organic medium, under different conditions, with good yields.L-ZAEt was obtained from DL-Z-alanine with 100 percent optical purity.We studied the effects of pH, the solvent/substrate and papain/substrate ratios and the type of organic solvent added, on the L-ZAEt yield.Unreactive D-ZA was also easily isolated from the aqueous phase with good optical purity.This attractive method has been applied to other N-Z-amino acid esters with the same succes.This procedure has been developed for the preparation of peptides using carboxylic or phosphonic substrates.These peptides have anti-bacterial activity. enzymatic catalysis / papain / chymopapain / stereospecific esterification of carboxylic amino acids / dipeptides / phosphonopeptides / anti-bacterial activity

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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N2708 – PubChem

In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 20375-65-9, name is 3-Phenyl-6-chloropyridazine, introducing its new discovery. Quality Control of 3-Phenyl-6-chloropyridazine

The synthesis of a new fused 1,2,5-triazepine-1,5-dione heterocycle, which is expected to mimic structural features of cis-peptldyl prolinamides, is described. The required parent heterocycle, corresponding to cis-glycy-(2S)-prolinamide, has been prepared in good yield by the cyclisation of N-(2-bromoacetylprolyl)-hydrazine which is itself generated in situ from the bromoacetyl proline methyl ester. Analogues corresponding to cis-(2R)-alanyl- and cis-(2S)-alanyl-(2S)-prolinamide have been similarly prepared from the appropriate N-(2-bromopropionyl)proline methyl esters and hydrazine hydrate where the cyclisation step, involving the displacement of bromide, has been shown to occur with inversion of configuration at C-2 of the propionyl moiety. Acylation at the N-3 position of the triazepine is equivalent to N-terminal acylation of the residue preceding the proline residue in cis-aminoacyl prolinamides. This has been achieved without incident using standard peptide coupling procedures. Extension at the ‘C-terminal’ has been achieved by preparing elaborated hydrazine precursors which are reacted with suitably activated esters of N-alpha-halogenoacylprolines, prior to cyclisation, to give the required fused triazepine dione. Thus it is possible to prepare constrained cis-peptidyl prolyl peptide mimetics of defined stereochemistry based upon this new triazepine dione in which all of the non-proline residues can be varied.

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Pyridazine – Wikipedia,
Pyridazine | C4H4N2685 – PubChem

Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. Formula: C10H7ClN2. Introducing a new discovery about 20375-65-9, Name is 3-Phenyl-6-chloropyridazine

Chemical modifications of eveminomicin antibiotics, particularly ziracin (1), were carried out to study the SAILs as well as the chemical properties of this class of compounds. Use of allyl ether group for protection and selective deprotection of phenolic groups provided access to a variety of novel analogs of the title compounds, some of which exhibited the same high in vitro potency as the parent compounds.

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Pyridazine – Wikipedia,
Pyridazine | C4H4N2630 – PubChem

Chemistry is traditionally divided into organic and inorganic chemistry. name: 3-Phenyl-6-chloropyridazine, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 20375-65-9

Paclitaxel conjugates of 7-phenylacetamidocephalosporanic acid were prepared as prodrugs for site specific activation by targeted beta-lactamase. Immunologically specific activation of the prodrug 5 containing 3,3-dimethyl-4-amino-butyric acid as linker in combination with the fusion protein L-49-sFv-beta-lactamase was demonstrated in vitro on 3677 melanoma cells.

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Pyridazine – Wikipedia,
Pyridazine | C4H4N2763 – PubChem

In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Application In Synthesis of 3-Phenyl-6-chloropyridazine, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 20375-65-9, name is 3-Phenyl-6-chloropyridazine. In an article，Which mentioned a new discovery about 20375-65-9

The synthesis and structure-activity relationships of zygosporamide, a known potent and selective cytotoxic natural product against SF-268 and RXF 393 cell lines, are described. The potencies of the synthetic zygosporamide are similar to those reported for the natural product toward all cancer cell lines examined with the exception of SF-268, the underlying cause of which remains to be elucidated.

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Pyridazine – Wikipedia,
Pyridazine | C4H4N2765 – PubChem

One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, Application In Synthesis of 3-Phenyl-6-chloropyridazine, such as the rate of change in the concentration of reactants or products with time.In a article, mentioned the application of 20375-65-9, Name is 3-Phenyl-6-chloropyridazine, molecular formula is C10H7ClN2

The total synthesis of (-)-actinobolin 2, an antipode of the natural product starting from D-glucose is described. A three-component coupling reaction of a functionalized cyclohexenone (+)-6, derived from D-glucose by way of Ferrier’s carbocyclization, with vinyl cuprate and an aldehyde (R)-5 effectively constructed the carbon framework of 2 in a highly stereoselective manner. The formal synthesis of the natural enantiomer 1 from D-glucose was also achieved.

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Pyridazine – Wikipedia,
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A series of dual-target AChE/PDE9A inhibitor compounds were designed, synthesized, and evaluated as anti-Alzheimer’s Disease (AD) agents. Among these target compounds, 11a (AChE: IC50 = 0.048 muM; PDE9A: IC50 = 0.530 muM) and 11b (AChE: IC50 = 0.223 muM; PDE9A: IC50 = 0.285 muM) exhibited excellent and balanced dual-target AChE/PDE9A inhibitory activities. Meanwhile, those two compounds possess good blood-brain barrier (BBB) penetrability and low neurotoxicity. Especially, 11a and 11b could ameliorate learning deficits induced by scopolamine (Scop). Moreover, 11a could also improve cognitive and spatial memory in Abeta25-35-induced cognitive deficit mice in the Morris water-maze test. In summary, our research developed a series of potential dual-target AChE/PDE9A inhibitors, and the data indicated that 11a was a promising candidate drug for the treatment of AD.

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Pyridazine – Wikipedia,
Pyridazine | C4H4N2650 – PubChem

Electric Literature of 20375-65-9, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.20375-65-9, Name is 3-Phenyl-6-chloropyridazine, molecular formula is C10H7ClN2. In a Article，once mentioned of 20375-65-9

3-Deoxy-DL-prumycin (1) was synthesized from 2-furanmethanol (2-furfuryl alcohol, 2) in eleven steps in 15% total yield. Michael addition of azide anion to 2,3-dideoxy-DL-pent-2-enopyranos-4-ulose (3) and reduction in situ of the adduct afforded the key intermediates 5 and 6. Introduction of a second azido group with inversion of configuration at C-4 afforded intermediates 14 and 17, both of wich had a threo configuration in regard to C-2 and C-4. Coupling with D-alanine and total deprotection yielded the title compound 1. 3-Deoxy-DL-prumycin (1) was synthesized from 2-furanmethanol (2-furfuryl alcohol, 2) in eleven steps in 15% total yield. Michael addition of azide anion to 2,3-dideoxy-DL-pent-2-enopyranos-4-ulose (3) and reduction in situ of the adduct afforded the key intermediates 5 and 6. Introduction of a second azido group with inversion of configuration at C-4 afforded intermediates 14 and 17, both of which had a threo configuration in regard to C-2 and C-4. Coupling with D-alanine and total deprotection yielded the title compound 1.

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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N2610 – PubChem

Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments. Application In Synthesis of 3-Phenyl-6-chloropyridazine. Introducing a new discovery about 20375-65-9, Name is 3-Phenyl-6-chloropyridazine

Preparations of optically active N-hydroxytartrimides were achieved. 1,3,4-Trihydroxysuccinimide ester of Z-L-alanine and 1-hydroxy-3,4-diacetoxysuccinimide ester of Z-D-alanine were allowed to react with D,L-alaninate to produce L-L form and D-D form of Z-Ala-Ala-OEt respectively (optical yield 100percent).

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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N2758 – PubChem