Tag: 200-300

Design, Synthesis, and biological evaluation of 8-mercapto-3,7-dihydro-1H-purine-2,6-diones as potent inhibitors of SIRT1, SIRT2, SIRT3, and SIRT5 was written by Han, Haozhen;Li, Chunpu;Li, Man;Yang, Lisheng;Zhao, Sen;Wang, Zhifei;Liu, Hong;Liu, Dongxiang. And the article was included in Molecules in 2020.Computed Properties of C9H11BrO This article mentions the following:

Sirtuins (SIRT1-7) are a family of NAD⁺-dependent deacetylases. They regulate many physiol. processes and play important roles in inflammation, diabetes, cancers, and neurodegeneration diseases. Sirtuin inhibitors have potential applications in the treatment of neurodegenerative diseases and various cancers. Herein, we identified new sirtuin inhibitors based on the scaffold of 8-mercapto-3,7-dihydro-1H-purine-2,6-dione. To elucidate the inhibitory mechanism, the binding modes of the inhibitors in SIRT3 were established by mol. docking, showing that the inhibitors occupy the acetyl lysine binding site and interact with SIRT3, mainly through hydrophobic interactions. The interactions were validated by site-directed mutagenesis of SIRT3 and structure-activity relationship anal. of the inhibitors. Consistently, enzyme kinetic assays and microscale thermophoresis showed that these compounds are competitive inhibitors to the acetyl substrate, and mix-type inhibitors to NAD⁺. Furthermore, we demonstrated that the compounds are potent SIRT1/2/3/5 pan-inhibitors. This study provides novel hits for developing more potent sirtuin inhibitors. In the experiment, the researchers used many compounds, for example, 1-(2-Bromoethyl)-4-methoxybenzene (cas: 14425-64-0Computed Properties of C9H11BrO).

1-(2-Bromoethyl)-4-methoxybenzene (cas: 14425-64-0) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. In the pharmaceutical industry organo bromine derivatives are used as sedatives, vasodilators, antiseptic agents, and anticancer agents.Computed Properties of C9H11BrO

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Copper(I)-Assisted Mild and Convenient Synthesis of New Se-N Heterocycles: Access to a Promising Class of GPx Mimics was written by Erdelmeier, Irene;Tailhan-Lomont, Catherine;Yadan, Jean-Claude. And the article was included in Journal of Organic Chemistry in 2000.Category: bromides-buliding-blocks This article mentions the following:

Benzisoselenazolines, benzisothiazolines, benzisoselenazines, and benzithiazines (I) (n = 0, 1; X = S, Se), designed as low mol. weight mimics of glutathione peroxidases, were synthesized for the first time. Starting from amines, a smooth introduction of selenium in nonactivated aryl bromides using KSeCN in the presence of CuI was developed. An equimolar quantity of CuI and the presence of Et₃N as a base are necessary to achieve a complete conversion of the starting material. The reaction is feasible in various solvents such as DMF, acetonitrile, and THF. The desired new Se-N and S-N heterocycles I were isolated under optimized conditions in yields of 82 and 68%, resp. Experiments were conducted with various copper(I) and copper(II) salts, a chloroamine, an aryl bromide, and an N-acylated amine to show the scope and the limitations of this method. Finally, a mechanistic scheme was proposed to discuss some interesting findings, which were obtained during the optimization process of this new introduction of selenium. In the experiment, the researchers used many compounds, for example, 2-(2-Bromophenyl)propan-2-amine (cas: 173026-23-8Category: bromides-buliding-blocks).

2-(2-Bromophenyl)propan-2-amine (cas: 173026-23-8) belongs to organobromine compounds. Most of the natural organobromine compounds are produced by marine organisms, and several brominated metabolites with antibacterial, antitumor, antiviral, and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. Many of the alkyl bromine derivatives are excellent alkylating agents since bromides are good leaving groups. Tribromides, like tetrabutylammonium tribromide, are used as a solid source of bromine. N-bromosuccimide (NBS) is used for the selective bromination of allylic bonds.Category: bromides-buliding-blocks

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Ligand-Controlled Nickel-Catalyzed Reductive Relay Cross-Coupling of Alkyl Bromides and Aryl Bromides was written by Peng, Long;Li, Yuqiang;Li, Yangyang;Wang, Wang;Pang, Hailiang;Yin, Guoyin. And the article was included in ACS Catalysis in 2018.Recommanded Product: 14425-64-0 This article mentions the following:

1,1-Diarylalkanes are important structural frameworks which are widespread in biol. active mols. Herein, we report a reductive relay cross-coupling of alkyl bromides with aryl bromides by nickel catalysis with a simple nitrogen-containing ligand. This method selectively affords 1,1-diarylalkane derivatives with good to excellent yields and regioselectivity. In the experiment, the researchers used many compounds, for example, 1-(2-Bromoethyl)-4-methoxybenzene (cas: 14425-64-0Recommanded Product: 14425-64-0).

1-(2-Bromoethyl)-4-methoxybenzene (cas: 14425-64-0) belongs to organobromine compounds. A variety of minor organobromine compounds are found in nature, but none are biosynthesized or required by mammals. Organobromine compounds have fallen under increased scrutiny for their environmental impact. Many of the alkyl bromine derivatives are excellent alkylating agents since bromides are good leaving groups. Tribromides, like tetrabutylammonium tribromide, are used as a solid source of bromine. N-bromosuccimide (NBS) is used for the selective bromination of allylic bonds.Recommanded Product: 14425-64-0

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Synthesis of isopentabromopseudilin was written by Hanefeld, Ulf;Laatsch, Hartmut. And the article was included in Liebigs Annalen der Chemie in 1991.SDS of cas: 108940-96-1 This article mentions the following:

Isopentabromopseudilin (I, R = OH, R¹ = Br, R² = H) and the analogs I (R = H, R¹ = Br, R² = OH; R = R² = Br, R¹ = OH) have been synthesized by base-catalyzed cyclization of substituted benzaldehydes with CNCH₂CO₂Me. In contrast to the highly antibiotic and cytotoxic active natural product pentabromopseudilin, I are inactive. In the experiment, the researchers used many compounds, for example, 3,5-Dibromo-4-methoxybenzaldehyde (cas: 108940-96-1SDS of cas: 108940-96-1).

3,5-Dibromo-4-methoxybenzaldehyde (cas: 108940-96-1) belongs to organobromine compounds. Many of the organo bromine compounds are relatively nonpolar. Bromine is more electronegative than carbon (2.8 vs 2.5) and hence the carbon in a carbon–bromine bond is electrophilic in nature. One prominent application of synthetic organobromine compounds is the use of polybrominated diphenyl ethers as fire-retardants, and in fact fire-retardant manufacture is currently the major industrial use of the element bromine.SDS of cas: 108940-96-1

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Electrochemistry and photophysics of donor-substituted triarylboranes: symmetry breaking in ground and excited state was written by Stahl, Rainer;Lambert, Christoph;Kaiser, Conrad;Wortmann, Ruediger;Jakober, Ruth. And the article was included in Chemistry – A European Journal in 2006.Computed Properties of C8H8Br2 This article mentions the following:

We synthesized a series of amino substituted triarylboranes (TABs) by copper(I)-catalyzed cross-coupling reactions. The title compounds were investigated by means of cyclic voltammetry (CV) and UV-visible absorption and fluorescence spectroscopy. Electrochem. oxidation of tris(4-carbazolyl-2,6-dimethylphenyl)borane (3) leads to the formation of an electroactive polymer film on the electrode surface. The charge-transfer (CT) absorption band of all three TABs shows a pronounced neg. solvatochromism, while the emission is pos. solvatochromic. By combining Jortner’s theory, AM1 computations, and electrooptical absorption measurements (EOAM), this unexpected behavior was shown to be due to a dipole inversion upon S₀→S₁ excitation. Furthermore, polarized steady-state fluorescence spectroscopy and EOAM prove that the ground-state geometry of 3 is of lower symmetry than D₃ and that the excitation energy can be transferred from one subchromophore to another within the lifetime of the excited state. Exciton-coupling theory was used to quant. analyze this excitation transfer. In the experiment, the researchers used many compounds, for example, 2,5-Dibromo-1,3-dimethylbenzene (cas: 100189-84-2Computed Properties of C8H8Br2).

2,5-Dibromo-1,3-dimethylbenzene (cas: 100189-84-2) belongs to organobromine compounds. Most of the natural organobromine compounds are produced by marine organisms, and several brominated metabolites with antibacterial, antitumor, antiviral, and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.Computed Properties of C8H8Br2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Pd-Catalyzed/Iodide-Promoted α-Arylation of Ketones for the Regioselective Synthesis of Isocoumarins was written by Casnati, Alessandra;Maggi, Raimondo;Maestri, Giovanni;Della Ca’, Nicola;Motti, Elena. And the article was included in Journal of Organic Chemistry in 2017.Recommanded Product: Methyl 2-bromo-4-fluorobenzoate This article mentions the following:

A variety of isocoumarins have been synthesized directly from 2-halobenzoates and ketones through a palladium-catalyzed α-arylation step followed by an intramol. cyclization process. The addition of iodide anions to the reaction mixture increased yields and selectivities especially when 2-bromobenzoates were employed. This phosphine-free one-pot synthesis features a high functional group tolerance and gives access to richly decorated isocoumarins. This general methodol. was successful in the total synthesis of Xyridin A, an important natural product with antibacterial and antifungal activity. In the experiment, the researchers used many compounds, for example, Methyl 2-bromo-4-fluorobenzoate (cas: 653-92-9Recommanded Product: Methyl 2-bromo-4-fluorobenzoate).

Methyl 2-bromo-4-fluorobenzoate (cas: 653-92-9) belongs to organobromine compounds. Bromo compounds are employed in a variety of metal-catalyzed coupling reactions. They are also ideal candidates for the synthesis of Grignard reagents that have wide-applicability in organic synthesis. alpha-Bromoesters are employed in the Reformatsky reaction for the synthesis of beta-hydroxyesters. Bromine-containing agents predominate because not only are they more efficient than similar chlorine-containing species, but also the high atomic weight of bromine ensures that it is present in a high mass fraction within most organobromine compounds.Recommanded Product: Methyl 2-bromo-4-fluorobenzoate

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Synthesis and study on the spectral properties of novel compounds containing bromo-arylbenzothiazole moiety was written by Hu, Ji;Li, Zai-jun;Song, Qi-jun. And the article was included in Huaxue Shiji in 2008.Reference of 108940-96-1 This article mentions the following:

In the present paper, pthalylimide as the raw material orderly reacted was subjected to nitration, reduction, mercaptization, and hydrazination reactions, resp., for the synthesis 6-amino-7-mercapto-2,3-dihydro-1,4-phthalazinedione (AMHP). AMHP reacted with 4-bromobenzaldehyde, 3,5-dibromo-4-hydroxybenzaldehyde, 3, 5-dibromo-2-hydroxybenzaldehyde, 3, 5-dibromo-4-methoxy-benzaldehyde and tribromobenzaldehyde to form different compounds containing 2-arybenzothiazole moiety, which were abbreviated as p-Br-AMHP, DB-p-H-AMHP, DB-o-H-AMHP, DB-p-MO-AMHP and TB-AMHP, resp., and their structures were characterized by IR, NMR and elemental anal. Then the spectral properties of new compounds were investigated investigated in detail, and the results exhibited that they were all good luminescent reagents and their chemiluminescence intensities were obviously better than that of conventional illuminant luminol. Among these compounds, DB-p-H-AMHP was the best and its chemiluminescence intensity was 230 times that of luminol, indicating that the reagent can be widely applied in anal. chem. In the experiment, the researchers used many compounds, for example, 3,5-Dibromo-4-methoxybenzaldehyde (cas: 108940-96-1Reference of 108940-96-1).

3,5-Dibromo-4-methoxybenzaldehyde (cas: 108940-96-1) belongs to organobromine compounds. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. Bromine-containing agents predominate because not only are they more efficient than similar chlorine-containing species, but also the high atomic weight of bromine ensures that it is present in a high mass fraction within most organobromine compounds.Reference of 108940-96-1

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

A rational design of carbazole-based host materials with suitable spacer group towards highly-efficient blue phosphorescence was written by Yuan, Xiao-Dong;Liang, Jian;He, Yun-Chu;Li, Qian;Zhong, Cheng;Jiang, Zuo-Quan;Liao, Liang-Sheng. And the article was included in Journal of Materials Chemistry C: Materials for Optical and Electronic Devices in 2014.HPLC of Formula: 100189-84-2 This article mentions the following:

Two novel carbazole derivatives, 3,3′-(2,6-dimethyl-1,4-phenylene)bis(9-phenyl-9H-carbazole) (DMCz) and 3,3′-(2,3,5,6-tetramethyl-1,4-phenylene)bis(9-phenyl-9H-carbazole) (TMCz), are designed and synthesized as host materials for blue phosphorescent organic light emitting diodes (PHOLEDs). Both the materials possess sufficiently high glass transition temperatures and triplet energies for the blue dopant Ir-complex Ir(III) bis(4,6-(difluorophenyl)-pyridinato-N,C’)picolinate (FIrpic, 2.65 eV). The device using DMCz as the host material showed a better performance than that of TMCz with a maximum power efficiency of 36.0 ± 0.7 lm per W, a maximum current efficiency of 43.7 ± 0.6 cd per A and a maximum external quantum efficiency (EQE) of 18.5 ± 0.1%. In the experiment, the researchers used many compounds, for example, 2,5-Dibromo-1,3-dimethylbenzene (cas: 100189-84-2HPLC of Formula: 100189-84-2).

2,5-Dibromo-1,3-dimethylbenzene (cas: 100189-84-2) belongs to organobromine compounds. Most of the natural organobromine compounds are produced by marine organisms, and several brominated metabolites with antibacterial, antitumor, antiviral, and antifungal activity have been isolated from seaweed, sponges, corals, molluscs, and others. Bromine-containing agents predominate because not only are they more efficient than similar chlorine-containing species, but also the high atomic weight of bromine ensures that it is present in a high mass fraction within most organobromine compounds.HPLC of Formula: 100189-84-2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Triazole-linked fluorescent bisboronic acid capable of selective recognition of the Lewis Y antigen was written by Wang, Yan’en;Rong, Ruixue;Chen, Hua;Zhu, Mengyuan;Wang, Binghe;Li, Xiaoliu. And the article was included in Bioorganic & Medicinal Chemistry Letters in 2017.COA of Formula: C12H16BBrO2 This article mentions the following:

Cell surface carbohydrates of the Lewis blood group antigens, Lewis X (Le^x), Lewis Y (Le^y), Lewis A (Le^a), and their sialylated derivatives, such as sialy Lewis X (sLe^x) and sialy Lewis A (sLe^a), play important roles in various recognition processes. These cell surface carbohydrates have also been associated with the development and progression of many types of cancers. Recently, we synthesized four anthracene-based fluorescent bisboronic acid sensors (compounds 2a-d) linked by ‘click’ chem. with tethers of different lengths to match the epitope of various Lewis group of sugars. Among the four compounds, 2a appears to have both high sensitivity and selectivity for Le^y among other carbohydrate antigens. In the experiment, the researchers used many compounds, for example, 2-(2-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane (cas: 166821-88-1COA of Formula: C12H16BBrO2).

2-(2-(Bromomethyl)phenyl)-5,5-dimethyl-1,3,2-dioxaborinane (cas: 166821-88-1) belongs to organobromine compounds. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents. Many of the alkyl bromine derivatives are excellent alkylating agents since bromides are good leaving groups. Tribromides, like tetrabutylammonium tribromide, are used as a solid source of bromine. N-bromosuccimide (NBS) is used for the selective bromination of allylic bonds.COA of Formula: C12H16BBrO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Microwave-assisted synthesis of azoniaspiro compounds using a novel catalyst, 1-aza-phenothiazine was written by Gupta, Archana;Sakhuja, Rajeev;Kushwaha, Khushbu;Jain, Subhash C.. And the article was included in Synthetic Communications in 2011.Computed Properties of C13H14BrNO2 This article mentions the following:

1-Aza-phenothiazine catalyzed the intramol. cyclization of N-(bromoalkyl)phthalimides in the presence of anhydrous K₂CO₃ to form spiro cyclic quaternary ammonium salts, namely azoniaspiro compounds, under microwave irradiation A novel and eco-friendly method was developed for the synthesis of azoniaspiro compounds, and the role of aza-phenothiazine as a catalyst in such reactions was established for the first time. In the future, this protocol can be extended to the synthesis of various substituted N-heterocycles by hydrolyzing the resulting azoniaspiro compounds In the experiment, the researchers used many compounds, for example, N-(5-Bromopentyl)phthalimide (cas: 954-81-4Computed Properties of C13H14BrNO2).

N-(5-Bromopentyl)phthalimide (cas: 954-81-4) belongs to organobromine compounds. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. Commercially available organobromine pharmaceuticals include the vasodilator nicergoline, the sedative brotizolam, the anticancer agent pipobroman, and the antiseptic merbromin. Computed Properties of C13H14BrNO2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary