Heterocyclic Building Blocks-Pyridazine

In heterogeneous catalysis, the catalyst is in a different phase from the reactants. COA of Formula: C4H5N3, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 20744-39-2, name is Pyridazin-4-amine. In an article，Which mentioned a new discovery about 20744-39-2

There is provided a FAAH inhibitor and a prophylactic or therapeutic agent for cerebrovascular disorders or sleep disorders comprising it. The prophylactic or therapeutic agent comprises a compound of the formula (I0): wherein Z is oxygen or sulfur; R1 is aryl which may be substituted, or a heterocyclic group which may be substituted; R1a is a hydrogen atom, a hydrocarbon group which may be substituted, hydroxyl, etc.; R2 is piperidin-1,4-diyl which may be substituted, or piperazin-1,4-diyl which may be substituted; R3 is a group formed by eliminating two hydrogen atoms from a 5-membered aromatic heterocyclic group having 1 to 3 heteroatoms selected from nitrogen, oxygen and sulfur, which may be further substituted, -CO-, etc.; and R4 is a hydrocarbon group which may be substituted, or a heterocyclic group which may be substituted; or a salt thereof.

I hope this article can help some friends in scientific research. I am very proud of our efforts over the past few months and hope to 20744-39-2, help many people in the next few years.Formula: C4H5N3

Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N130 – 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

Strains of the bacteria Erwinia herbicola produce antibiotics that effectively control E. amylovora, the bacterial pathogen responsible for the plant disease fire blight. Pantocin B was the first of these antibiotics to be characterized, and a flexible synthesis of various analogues is reported. Embedded in the “pseudotripeptide” backbone of pantocin B are a methylenediamine and a methyl sulfone, both unusual structural features in natural products. The peptidic nature of pantocin B facilitated a series of structure-activity relationship studies that probed the roles of these functional groups in determining the biological activity of pantocin B. A clear demarcation of the roles between the N- and C-terminal portions of the antibiotic was determined as a result of the structure-activity relationship studies. The N-terminal L-alanyl group is needed for cellular import but not for interaction with the intracellular target, the arginine biosynthetic enzyme N-acetylomithine aminotransferase. The methylenediamine and methyl sulfone portions were found to be essential for antibiotic activity, presumably due to extensive interactions with N-acetylornithine aminotransferase.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. Safety of 3-Phenyl-6-chloropyridazine, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 20375-65-9, in my other articles.

Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N2752 – PubChem

19064-67-6, Name is 6-Chloro-3-hydroxypyridazine, belongs to pyridazine compound, is a common compound. SDS of cas: 19064-67-6In an article, once mentioned the new application about 19064-67-6.

A kinetic study has been made of the first-order thermal decomposition of the title compounds into ethylene and the corresponding aza-substituted pyridines, between 650 and 713 K.The relative elimination rates at 650 K are (2-ethoxypyridine = 1): 0.545, 10.0, 1.03, 1.12, 9.68, and 3.28, respectively.The electronic effects of the aza ‘substituent’ are small, and a more important factor appears to be the C-N ?-bond order; this latter accounts for the high reactivity of the pyridazines.The effects of the chloro substituent and of the aza ‘substituent’ are explicable in terms of a balance between electron withdrawal from the C-O bond (producing deactivation) and from the nitrogen involved in the cyclic transition state (producing deactivation).The effects of the chloro substituents confirm that the most important step of the reaction is breaking of the C-O bond.The statistically corrected rate (per ring nitrogen) of 2-ethoxypyrimidine is unexpectedly low.This may reflect difficulty in achieving the coplanar transition state in which the lone pairs in the s-orbitals of oxygen and the nitrogen not involved in the elimination are brought into close proximity.

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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N745 – PubChem

5096-73-1, Name is 6-Chloropyridazine-3-carboxylic acid, belongs to pyridazine compound, is a common compound. SDS of cas: 5096-73-1In an article, once mentioned the new application about 5096-73-1.

Treatment of electron deficient pyridine N-oxides with 4-nitrobenzoyl chloride and a cyclic thioether in the presence of triethylamine leads to the corresponding 2-functionalized product in up to a 74% isolated yield. The transformation can also be accomplished with alternative nitrogen containing heterocycles, including quinolines, pyrimidines, and pyrazines. To expand the scope of the transformation, diisopropyl ether can be used as the reaction medium to allow for the use of solid thioether substrates.

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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N2050 – PubChem

1837-55-4, Name is 3,5-Dichloropyridazine, belongs to pyridazine compound, is a common compound. Recommanded Product: 3,5-DichloropyridazineIn an article, once mentioned the new application about 1837-55-4.

The present invention relates to a compound of formula I, HetAr is a five or six membered heteroaryl group, selected from wherein R1 is hydrogen, halogen, lower alkyl, lower alkoxy or lower alkyl substituted by halogen, and may be the same or different, if two R1 occur; R2 is lower alkyl or a mono- or polydeutered derivative thereof, lower alkyl substituted by halogen or lower alkoxy, lower alkenyl unsubstituted or substituted by halogen, cycloalkyl or CH2-cycloalkyl unsubstituted or substituted by halogen, heterocycloalkyl or CH2-heterocycloalkyl unsubstituted or substituted by lower alkyl; R3 is halogen, lower alkyl, lower alkyl substituted by halogen, lower alkoxy substituted by halogen or S(0)2-lower alkyl; n is 1, 2 or 3; if n is >1, then R3 may be the same or different; or to a pharmaceutically active acid addition salt thereof, to a racemic mixture or to its corresponding enantiomer and/or an optical isomer and/or stereoisomer thereof. The compounds may be used for the treatment of Alzheimer’s disease, cerebral amyloid angiopathy, hereditary cerebral hemorrhage with amyloidosis, Dutch-type (HCHWA-D), multi-infarct dementia, dementia pugilistica or Down syndrome.

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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N1139 – PubChem

Reference of 141-30-0, Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 141-30-0, molcular formula is C4H2Cl2N2, introducing its new discovery.

We have recently shown that an aryloaminopyridazine derivarive of GABA, SR 95103 <2-(3-carboxypropyl)-3-amino-4-methyl-6-phenylpyridazinium chloride>, is a selective and competitive GABA-A receptor antagonist.In order to further explore the structural requirements for GABA receptor affinity, we synthesized a series of 38 compounds by attaching various pyridazinic structures to GABA or GABA-like side chains.Most of the compounds displaced <3H>GABA from rat brain membranes.All the active compounds antagonized the GABA-elicited enhancement of <3H>diazepam binding, strongly suggesting that all these compounds are GABA-A receptor antagonists.None of the compounds that displaced <3H>GABA from rat brain membranes interacted with other GABA recognition sites (GABA-B receptor, GABA uptake binding site, glutamate decarboxylase, GABA-transaminase).They did not interact with the Cl- ionophore associated with the GABA-A receptor and did not interact with the benzodiazepine, strychnine, and glutamate binding sites.Thus these compounds appear to be specific GABA-A receptor antagonists.In terms of structure-activity, it can be concluded that a GABA moiety bearing a positive charge is necessary for optimal GABA-A receptor recognition.Additional binding sites are tolerated only if they are part of a charge-delocalized amidinic or guanidinic system.If this delocalization is achieved by linking a butyric acid moiety to the N(2) nitrogen of a 3-aminopyridazine, GABA-antagonistic character is produced.The highest potency (ca.250 times bicuculline) was observed when an aromatic ? system, bearing electron-donating substituents, was present on the 6-position of the pyridazine ring.

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 141-30-0 is helpful to your research. Application of 141-30-0

Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N1955 – PubChem

Chemistry is traditionally divided into organic and inorganic chemistry. Recommanded Product: 1121-79-5, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 1121-79-5

A crystalline form of 6-{2-[l-(6-methyl-3-pyridazinyl)-4-piperidinyl]ethoxy}- 3-ethoxy-l,2-benzoxazole is provided which is useful in the treatment of infections caused by Picornaviridae such as human rhinovirus (HRV), and in particular the crystal form is an anhydrous crystalline free base form of 6-{2-[l-(6-methyl-3- pyridazinyl)-4-piperidinyl]ethoxy}-3-ethoxy-l,2-benzoxazole. In addition, a method of manufacturing the free base crystalline form is also provided, including a step of micronizing the compound particles, optionally using a wetting agent, as well as pharmaceutical compositions incorporating the free base crystalline form such as tablets or suspensions, and methods of therapeutic treatments using this form and pharmaceutical compositions thereof.

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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N593 – PubChem

One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, Recommanded Product: 3,6-Dichloropyridazine, such as the rate of change in the concentration of reactants or products with time.In a article, mentioned the application of 141-30-0, Name is 3,6-Dichloropyridazine, molecular formula is C4H2Cl2N2

(Equation presented) The catalytic asymmetric dihydroxylation of olefins has been accomplished with high enantioselectivities using a proline-based catalyst. The pre-transition-state assembly for styrene is shown.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. category: pyridazine, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 141-30-0, in my other articles.

Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N1738 – PubChem

One of the major reasons for studying chemical kinetics is to use measurements of the macroscopic properties of a system, category: pyridazine, such as the rate of change in the concentration of reactants or products with time.In a article, mentioned the application of 27372-38-9, Name is 6-Oxo-1,4,5,6-tetrahydropyridazine-3-carboxylic acid, molecular formula is C5H6N2O3

Herein, we described the design and synthesis of a series of pyridazine-3-carboxamides to be CB2-selective agonists via a combination of scaffold hopping and bioisosterism strategies. The compounds were subjected to assessment of their potential activities through calcium mobilization assays. Among the tested derivatives, more than half of these compounds exhibited moderate to potent CB2 agonist activity. Six compounds showed EC50 values below 35 nM, and several derivatives also exhibited significantly enhanced potency and high selectivity at the CB2 receptor over the CB1 receptor. Specifically, compound 26 showed the highest CB2 agonist activity (EC50 = 3.665 ± 0.553 nM) and remarkable selectivity (Selectivity Index > 2729) against CB1. In addition, logPs of some representative compounds were measured to display significantly decreased values in comparison with GW842166X. Furthermore, docking simulations were conducted to explain the interaction mode of this series.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. HPLC of Formula: C5H6N2O3, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 27372-38-9, in my other articles.

Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N1019 – PubChem

89180-50-7, Name is 5,6-Dichloropyridazin-4-amine, belongs to pyridazine compound, is a common compound. COA of Formula: C4H3Cl2N3In an article, once mentioned the new application about 89180-50-7.

New syntheses of oxazolo<4,5-d>pyridazine derivatives 7 and 11 were achieved by the cyclization of substituted N-pyridazin-5-ylformamide oximes 6 and 10.Under mild reaction conditions the transformations of the substituted amino group at position 2 of the oxazolo<4,5-d>pyridazine system 7 occured to produce the compounds 11, 14, and 15, while under more drastic reaction conditions the nucleophilic attack at carbon at position 2 followed by the ring opening of the oxazole part of the molecule was observed to give the compounds 13, 16, 17 and 18. – Keywords: Cyclization with C-O bond formation; Substituted N-pyridazin-5-ylformamidines and -formamide oximes; Oxazolo<4,5-d>pyridazines; Ring opening of oxazolo<4,5-d>pyridazines

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Reference：
Pyridazine – Wikipedia,
Pyridazine | C4H4N2215 – PubChem