Category: 3066-84-0

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 8-Bromoguanine( cas:3066-84-0 ) is researched.Recommanded Product: 3066-84-0.Petty, Jeffrey T.; Ganguly, Mainak; Yunus, Ahmed I.; He, Chen; Goodwin, Peter M.; Lu, Yi-Han; Dickson, Robert M. published the article 《A DNA-encapsulated silver cluster and the roles of its nucleobase ligands》 about this compound( cas:3066-84-0 ) in Journal of Physical Chemistry C. Keywords: DNA encapsulated silver cluster nucleobase ligand role. Let’s learn more about this compound (cas:3066-84-0).

Ag clusters consisting of ∼10 atoms are readily bound by and encapsulated within DNA strands to yield strong absorption and emission. The coordination environments, however, are poorly understood, so cluster adducts can only be empirically tuned. This work describes the C4AC4TC3G strand that templates a particular cluster adduct. Its sequence has 3 types of nucleobases with distinct roles, including tracts of cytosines that collectively coordinate the cluster, thymine acting as a junction in the overall strand, and the adenine/guanine pair that exclusively forms the cluster. In relation to the native oligonucleotide, the DNA-Ag cluster complex diffuses faster and is more compact, thus suggesting that the strands fold because of the cluster. The Ag106+ adduct emits with λex/λem = 490/540 nm, a 19% quantum yield, and a biexponential 1.1/2.1 ns lifetime. The electronic environment for the cluster is controlled by the heteroatoms in adenine and guanine. Most significantly, the N7 and the N2 atoms in guanine change the fluorescence quantum yield by 60-fold and shift the fluorescence lifetime by ∼3.8 ns. Thus, our studies discern distinct spectroscopic and structural roles for the nucleobase ligands in C4AC4TC3G, and these findings may help develop new DNA templates for other Ag cluster adducts.

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Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Using Density Functional Theory To Design DNA Base Analogues with Low Oxidation Potentials, published in 2001-07-12, which mentions a compound: 3066-84-0, Name is 8-Bromoguanine, Molecular C5H4BrN5O, COA of Formula: C5H4BrN5O.

The oxidizability of substituted nucleobases was evaluated through theor. calculations and the ability of individual bases to induce current enhancement in the cyclic voltammograms of metal complexes. Formation of the guanine derivatives 7-deazaguanine and 8-oxoguanine is known to lower the energy for oxidation of guanine. The similar derivatives of adenine were examined and gave lower predicted redox energies as well as current enhancement with Ru(bpy)32+ (7-deazaadenine) and Fe(bpy)32+ (8-oxoadenine). Oxidizable, substituted pyrimidines were identified using a computational library that gave 5-aminocytosine and 5-aminouracil as promising electron donors. Again, these predictions were verified using catalytic electrochem. In addition, the computations predicted that 6-aminocytosine would be redox-active but not as easily oxidized as 5-aminocytosine, which was also confirmed exptl. In addition to calculating the relative one-electron redox potentials, we used calculations to evaluate the loss of a proton that occurs from the initially formed radical cation. These calculations gave results consistent with the experiments, and in the case of 8-oxoadenine, the relative redox reactivity could be predicted only when the proton loss step was considered. These substituted bases constitute building blocks for highly redox-active nucleic acids, and the associated theor. model provides powerful predictability for designing new redox-active nucleobases.

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Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Synthesis of 6- and 8-alkynylated purines and their ribonucleosides by the coupling of halopurines with alkynes, published in 1982, which mentions a compound: 3066-84-0, mainly applied to alkynylated purine; nucleotide alkynylated purine; alkynylation purine; coupling halopurine alkyne; cytokinin activity alkynylated purine, Recommanded Product: 3066-84-0.

Coupling reactions of 6-iodo- or 6-chloropurine with alkynes in the presence of (PPh3)2PdCl2-CuI catalyst in Et3N to give 6-alkynylated purines was achieved by the use of dipolar aprotic solvent as cosolvent. Under the reaction conditions, ribonucleoside as well as its tri-O-acetate of 6-chloropurine also gave the corresponding alkynylated products in high yields. Though similar reaction for 8-bromo derivatives of adenineand guanine gave poor yields, the 8-alkynylated free bases could be obtained by acid hydrolysis of the alkynylated ribonucleosides. 6-Alkynylated purines exhibited moderate to weak cytokinin activity in Amaranthus test.

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Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Category: tetrahydrofurans. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 8-Bromoguanine, is researched, Molecular C5H4BrN5O, CAS is 3066-84-0, about Activation of murine lymphocytes by cyclic guanosine 3′,5′-monophosphate: specificity and role in mitogen action. Author is De Rubertis, Frederick R.; Zenser, Terry.

Cyclic GMP and guanosine modestly increased the incorporation of thymidine-3H into DNA by cultured mouse spleen lymphocytes, but were far less effective than their 8-bromo(Br) derivatives However, on a molar basis the mitogenic activity of both 8-Br-guanosine and 8-Br-5′-GMP exceeded that of 8-Br-cyclic GMP, when tested in the presence and absence of serum in the culture media. Combined addition of maximal doses of these nucleotides did not give additive stimulatory effects, suggesting an action on a common subpopulation of cells, and possibly a common mechanism. By contrast, cyclic AMP, 8-Br-cyclic AMP, 8-Br-adenosine, cholera toxin and prostaglandin E1 suppressed both basal thymidine-3H incorporation and stimulation of this parameter by T-cell mitogens and the guanine nucleotides. Rapid effects of concanavalin A, phytohemagglutinin, SEB (staphylococcal enterotoxin B), guanosine, 5′-GMP, 8-Br-guanosine, and 8-Br-5′-GMP on the cyclic GMP content of murine lymphocytes could not be demonstrated. Similarly, concanavalin A, phytohemagglutinin and SEB failed to alter guanylate cyclase activity when added directly to cellular homogenates or preincubated with intact cells. Conversely, carbamylcholine rapidly increased lymphocyte cyclic GMP but was not mitogenic. Apparently, cyclic GMP and cyclic AMP are antagonistic in their influence on lymphocyte mitogenesis.

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Tetrahydrofuran – Wikipedia,
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Name: 8-Bromoguanine. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 8-Bromoguanine, is researched, Molecular C5H4BrN5O, CAS is 3066-84-0, about HF-STEX and RASSCF calculations on nitrogen K-shell X-ray absorption of purine base and its derivative. Author is Mochizuki, Yuji; Koide, Hiroshi; Imamura, Toshiyuki; Takemiya, Hiroshi.

The nitrogen K-shell X-ray absorption spectra of the purine bases present in nucleic acids, adenine and guanine, were analyzed by using ab initio Hartree-Fock static exchange and restricted-active-space self-consistent-field calculations A variety of derivative mols. were calculated to investigate the energetic shifts due to environmental effects on the nitrogen atoms. Shake-up excitations were also addressed.

Although many compounds look similar to this compound(3066-84-0)Name: 8-Bromoguanine, numerous studies have shown that this compound(SMILES:NC(N1)=NC(NC(Br)=N2)=C2C1=O), has unique advantages. If you want to know more about similar compounds, you can read my other articles.

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Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 8-Bromoguanine, is researched, Molecular C5H4BrN5O, CAS is 3066-84-0, about Comparison of Aqueous and 1-Octanol Solubility as well as Liquid-Liquid Distribution of Acyclovir Derivatives and Their Complexes with Hydroxypropyl-β-Cyclodextrin, the main research direction is acyclovir derivative complex hydroxypropyl cyclodextrin octanol solubility liquid distribution; Acyclovir derivatives; Complexation; Cyclodextrin; Partition; Solubility.SDS of cas: 3066-84-0.

The aim of the presented work is the comparison of aqueous and 1-octanol solubilities of different acyclovir derivatives and their hydroxypropyl-β-cyclodextrin inclusion complexes. The solubility measurements were carried out at different temperatures over the range 25-45 °C using water, 1-octanol, water saturated with 1-octanol, 1-octanol saturated with water, buffered aqueous solutions (pH = 5.5 and 7.0) and buffered aqueous solutions containing cyclodextrin as solvents. The aqueous solubilities of the compounds are very low but may be enhanced by complexation with hydroxypropyl-β-cyclodextrin, especially if the acyclovir derivatives have aromatic groups which may be included in the cyclodextrin cavity. The values of 1-octanol-water partition coefficients of acyclovir derivatives, obtained using extraction experiments, showed a similar sequence as the solubility results in 1-octanol. Addnl., some mol. mechanics and mol. dynamic calculations were performed to determine optimized structures of acyclovir derivative complexes with β-cyclodextrin treated as a model.

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Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Formula: C5H4BrN5O. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 8-Bromoguanine, is researched, Molecular C5H4BrN5O, CAS is 3066-84-0, about Kinetics and mechanism of plasmon-driven dehalogenation reaction of brominated purine nucleobases on Ag and Au. Author is Dutta, Anushree; Schuermann, Robin; Kogikoski, Sergio Jr.; Mueller, Niclas S.; Reich, Stephanie; Bald, Ilko.

Plasmon-driven photocatalysis is an emerging and promising application of noble metal nanoparticles (NPs). An understanding of the fundamental aspects of plasmon interaction with mols. and factors controlling their reaction rate in a heterogeneous system is of high importance. Therefore, the dehalogenation kinetics of 8-bromoguanine (BrGua) and 8-bromoadenine (BrAde) on aggregated surfaces of silver (Ag) and gold (Au) NPs have been studied to understand the reaction kinetics and the underlying reaction mechanism prevalent in heterogeneous reaction systems induced by plasmons monitored by surface enhanced Raman scattering (SERS). We conclude that the time-average constant concentration of hot electrons and the time scale of dissociation of transient neg. ions (TNI) are crucial in defining the reaction rate law based on a proposed kinetic model. An overall higher reaction rate of dehalogenation is observed on Ag compared with Au, which is explained by the favorable hot-hole scavenging by the reaction product and the byproduct. We therefore arrive at the conclusion that insufficient hole deactivation could retard the reaction rate significantly, marking itself as rate-determining step for the overall reaction. The wavelength dependency of the reaction rate normalized to absorbed optical power indicates the nonthermal nature of the plasmon-driven reaction. The study therefore lays a general approach toward understanding the kinetics and reaction mechanism of a plasmon-driven reaction in a heterogeneous system, and furthermore, it leads to a better understanding of the reactivity of brominated purine derivatives on Ag and Au, which could in the future be exploited, for example, in plasmon-assisted cancer therapy.

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Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 8-Bromoguanine, is researched, Molecular C5H4BrN5O, CAS is 3066-84-0, about The reaction of nucleic acids with bromine.Synthetic Route of C5H4BrN5O.

Com. preparations of ribonucleic acid (RNA) from yeast and of deoxyribonucleic acid (DNA) from sperm, as well as high mol. DNA isolated from thymus reacted in aqueous solution with Br at temperature down to -35°. The mol. weight of brominated RNA decreased by about 15%. The nucleic acids were hydrolyzed in 70% HClO4. Paper chromatography of the products revealed the presence of 5-bromouracil, 5-bromocytosine and 8-bromoguanine. There was no indication that Br reacted with adenine or with the pentoses. Ribonuclease attacked the brominated products in the same way as normal RNA. Ultraviolet spectra of Brcontg. acids differed slightly from the original material, but infrared spectra in the range of 6.3-7.3 μ were markedly different.

In some applications, this compound(3066-84-0)Synthetic Route of C5H4BrN5O is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

Reference:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 8-Bromoguanine( cas:3066-84-0 ) is researched.Computed Properties of C5H4BrN5O.Yoneyama, Toshie; Wilson, Lisa M.; Hatakeyama, Kazuyuki published the article 《GTP Cyclohydrolase I Feedback Regulatory Protein-Dependent and -Independent Inhibitors of GTP Cyclohydrolase I》 about this compound( cas:3066-84-0 ) in Archives of Biochemistry and Biophysics. Keywords: GTP cyclohydrolase I inhibitor GFRP protein guanine derivative; feedback regulatory protein inhibitor GTP cyclohydrolase I. Let’s learn more about this compound (cas:3066-84-0).

GTP cyclohydrolase I feedback regulatory protein (GFRP) mediates the feedback inhibition of GTP cyclohydrolase I activity by (6R)-L-erythro-5,6,7,8-tetrahydrobiopterin (BH4) through protein complex formation. Since guanine and BH4 have a common pyrimidine ring structure, we examined the inhibitory effect of guanine and its analogs on the enzyme activity. Guanine, 8-hydroxyguanine, 8-methylguanine, and 8-bromoguanine inhibited the enzyme activity in a GFRP-dependent and pH-dependent manner and induced complex formation between GTP cyclohydrolase I and GFRP. The type of inhibition by this group is a mixed type. All these properties were shared with BH4. In striking contrast, inhibition by 8-azaguanine and 8-mercaptoguanine was GFRP-independent and pH-independent. The type of inhibition by 8-azaguanine and 8-mercaptoguanine was a competitive type. The two compounds did not induce complex formation between the enzyme and GFRP. These results demonstrate that guanine compounds of the first group bind to the BH4-binding site of the GTP cyclohydrolase I/GFRP complex, whereas 8-azaguanine and 8-mercaptoguanine bind to the active site of the enzyme. Finally, the possible implications in Lesch-Nyhan syndrome and Parkinson diseases of the inhibition of GTP cyclohydrolase I by guanine and 8-hydroxyguanine are discussed. (c) 2001 Academic Press.

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Reference:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 8-Bromoguanine, is researched, Molecular C5H4BrN5O, CAS is 3066-84-0, about The reaction of nucleic acids with bromine.Synthetic Route of C5H4BrN5O.

Com. preparations of ribonucleic acid (RNA) from yeast and of deoxyribonucleic acid (DNA) from sperm, as well as high mol. DNA isolated from thymus reacted in aqueous solution with Br at temperature down to -35°. The mol. weight of brominated RNA decreased by about 15%. The nucleic acids were hydrolyzed in 70% HClO4. Paper chromatography of the products revealed the presence of 5-bromouracil, 5-bromocytosine and 8-bromoguanine. There was no indication that Br reacted with adenine or with the pentoses. Ribonuclease attacked the brominated products in the same way as normal RNA. Ultraviolet spectra of Brcontg. acids differed slightly from the original material, but infrared spectra in the range of 6.3-7.3 μ were markedly different.

In some applications, this compound(3066-84-0)Synthetic Route of C5H4BrN5O is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.

Reference:
Tetrahydrofuran – Wikipedia,
Tetrahydrofuran | (CH2)3CH2O – PubChem