Day: February 24, 2023

Monitoring the site-specific incorporation of dual fluorophore-quencher base analogues for target DNA detection by an unnatural base pair system was written by Yamashige, Rie;Kimoto, Michiko;Mitsui, Tsuneo;Yokoyama, Shigeyuki;Hirao, Ichiro. And the article was included in Organic & Biomolecular Chemistry in 2011.Application of 92557-80-7 This article mentions the following:

We developed intramol. dual fluorophore-quencher base analogs for site-specific incorporation into DNA by an unnatural base pair replication system. An unnatural base pair between 7-(2-thienyl)-imidazo[4,5-b]pyridine (Ds) and 2-nitro-4-propynylpyrrole (Px) exhibits high fidelity in PCR amplification, and the 2-nitropyrrole moiety of Px acts as a quencher. Deoxyribonucleoside triphosphates of Px linked with a fluorophore (Cy3, Cy5 or FAM) were chem. synthesized, and the fluorescent properties and the enzymic incorporation of the fluorophore-linked dPxTPs into DNA were examined in PCR amplification. The fluorophore-linked dPxTPs were site-specifically incorporated by PCR into DNA, opposite Ds in templates, with high selectivity. Furthermore, we found that the fluorescence of the triphosphates was partially quenched, but increased upon their incorporation into DNA. These dual fluorophore-quencher base analogs would be useful for site-specific DNA labeling and for monitoring the amplification products of target nucleic acid mols. with a specific sequence. We have demonstrated the utility of the fluorophore-linked Px substrates and the Ds-Px pairing in real-time quant. PCR for target DNA mol. detection. In the experiment, the researchers used many compounds, for example, 2,5-Dioxopyrrolidin-1-yl 3′,6′-dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-5-carboxylate (cas: 92557-80-7Application of 92557-80-7).

2,5-Dioxopyrrolidin-1-yl 3′,6′-dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-5-carboxylate (cas: 92557-80-7) belongs to benzofurans derivatives.Benzofuran is one of the most significant oxygen-containing heterocycles consisting of fused benzene and furan ring, which are widely presented in various naturally occurring and synthetically active compounds. Introduction of benzofurans in organic synthesis, particularly drug synthesis, involves generally the use of their metalated species as nucleophiles in addition reactions or in metal-catalysed cross-coupling reactions.Application of 92557-80-7

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Chemotaxonomic significance of limonoids and triterpenoids from Dictamnus angustifolius G. Don ex Sweet was written by Lv, Meng-ying;Tang, Ben-qin;Teng, Jing;Liang, Jing-yu;Xu, Feng-guo;Zhang, Zun-jian;Sun, Jian-bo. And the article was included in Biochemical Systematics and Ecology in 2015.SDS of cas: 28808-62-0 This article mentions the following:

Phytochem. investigation of the root bark of Dictamnus angustifolius G. Don ex Sweet (Rutaceae) resulted in the isolation and characterization of three degraded limonoids (1-3), five limonoids (4-8) and four triterpenoids (9-12). All structures were elucidated on the basis of spectral anal. Among them, compounds 4, 6, 8, 9 and 12 were isolated from the genus Dictamnus for the first time. Compounds 10 and 11 were obtained from D. angustifolius for the first time. Moreover, the chemotaxonomic significance of these compounds was summarized. In the experiment, the researchers used many compounds, for example, (3R,3aR)-3-(Furan-3-yl)-3a,7-dimethyl-3a,4,5,6-tetrahydroisobenzofuran-1(3H)-one (cas: 28808-62-0SDS of cas: 28808-62-0).

(3R,3aR)-3-(Furan-3-yl)-3a,7-dimethyl-3a,4,5,6-tetrahydroisobenzofuran-1(3H)-one (cas: 28808-62-0) belongs to benzofurans derivatives. Benzofurans are only weakly aromatic in nature and they are cleaved by many oxidative and reductive conditions. Introduction of benzofurans in organic synthesis, particularly drug synthesis, involves generally the use of their metalated species as nucleophiles in addition reactions or in metal-catalysed cross-coupling reactions.SDS of cas: 28808-62-0

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Semisynthesis of new ethers from furyl-ring-based acylation derivatives of fraxinellone as insecticidal agents against Mythimna separata Walker in vivo was written by Yang, Ruige;Guo, Yong;Zhang, Yuanyuan;Xu, Hui. And the article was included in Chinese Chemical Letters in 2018.Product Details of 28808-62-0 This article mentions the following:

Fraxinellone, a naturally occurring degraded limonoid, is mainly isolated from Dictamnus dasycarpus and Melia azedarach. In continuation of our program aimed at the discovery of plant natural products-based insecticidal agents, twenty-two new ethers from furyl-ring-based acylation derivatives were prepared by structural modifications of fraxinellone. Their insecticidal activity was evaluated against the pre-third-instar larvae of Mythimna separata Walker in vivo. Among them, compounds I (R = 4-chlorophenyl) and I (R = 2-bromo-6-fluorophenyl) exhibited more potent insecticidal activity than toosendanin with the final mortality rates greater than 60%. Their structure-activity relationships were also discussed. In the experiment, the researchers used many compounds, for example, (3R,3aR)-3-(Furan-3-yl)-3a,7-dimethyl-3a,4,5,6-tetrahydroisobenzofuran-1(3H)-one (cas: 28808-62-0Product Details of 28808-62-0).

(3R,3aR)-3-(Furan-3-yl)-3a,7-dimethyl-3a,4,5,6-tetrahydroisobenzofuran-1(3H)-one (cas: 28808-62-0) belongs to benzofurans derivatives. Benzofuran derivatives are one of the most important oxygen-containing heterocycles. Benzofurans are stable towards alkali and readily polymerize on treatment with sulfuric acid, due to which they are useful for the preparation of low cost chemically relatively inert resins.Product Details of 28808-62-0

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

An update on prucalopride in the treatment of chronic constipation was written by Omer, Anam;Quigley, Eamonn M. M.. And the article was included in Therapeutic Advances in Gastroenterology in 2017.COA of Formula: C18H26ClN3O3 This article mentions the following:

Chronic constipation (CC) is a highly prevalent and often under-appreciated gastrointestinal disorder associated with significant impairment in quality of life. Symptoms of constipation are typically present for a number of years prior to a patient seeking help. Lifestyle modifications followed by, or coupled with, over-the-counter laxatives represent the initial treatment option; however, relief for many is limited and dissatisfaction rates for these approaches remain high. Over recent years, therefore, considerable effort has been exerted on the development of novel pharmacol. approaches. Two major targets have emerged, motility and secretion. Research on the former led to the development of a number of prokinetic agents capable of stimulating colonic motility and, thus, accelerating colonic transit. Of these, earlier prototypes such as cisapride and tegaserod, though effective, were ultimately withdrawn due to cardiovascular adverse events due in part to receptor non-selectivity. Highly selective serotonergic receptor agonists have since emerged which appear to be equally effective in stimulating gut motility but are devoid of cardiac side effects. One such agent is prucalopride, which has now been approved for the management of chronic idiopathic constipation in several countries, but not in the United States. Multiple multicenter, randomized placebo-controlled clin. trials have demonstrated superiority for prucalopride compared to placebo in the short to medium term in relieving the major symptoms of constipation in both men and women across a broad spectrum of ages, ethnicities and geog. locations. To date, prucalopride has enjoyed a favorable safety profile and there have been no signals to suggest arrythmogenicity. Efficacy over longer periods of treatment remains to be confirmed. Evidence for efficacy in other forms of constipation, such as opioid-induced constipation and that related to Parkinson’s disease is beginning to emerge; its status in the management of constipation-predominant irritable bowel syndrome or foregut motility disorders, such as gastroparesis, remains to be established. In the experiment, the researchers used many compounds, for example, 4-Amino-5-chloro-N-(1-(3-methoxypropyl)piperidin-4-yl)-2,3-dihydrobenzofuran-7-carboxamide (cas: 179474-81-8COA of Formula: C18H26ClN3O3).

4-Amino-5-chloro-N-(1-(3-methoxypropyl)piperidin-4-yl)-2,3-dihydrobenzofuran-7-carboxamide (cas: 179474-81-8) belongs to benzofurans derivatives. Benzofuran is a core structural unit found in many naturally occurring compounds with multidirectional biological activities. Benzofurans are stable towards alkali and readily polymerize on treatment with sulfuric acid, due to which they are useful for the preparation of low cost chemically relatively inert resins.COA of Formula: C18H26ClN3O3

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Photobleaching of Erythrosine B in Aqueous Environment Investigation Beyond pH was written by Kravchenko, Olga;Sutherland, Todd C.;Heyne, Belinda. And the article was included in Photochemistry and Photobiology in 2022.SDS of cas: 16423-68-0 This article mentions the following:

In the scientific literature, the term aqueous environment is loosely employed as it encompasses a broad range of different buffering agents. While there is an increasing number of exptl. evidence that point toward specific buffer effects extending far beyond pH, the impact of the chem. nature of the buffering ions is often disregarded, especially in photochem. studies. Herein, we highlighted the importance of buffer specific effects on both the photobleaching and the singlet oxygen quantum yields of a dye in aqueous environments. For this study, we chose erythrosine B (EB) as our model photosensitizer as its photochem. and photobleaching are well documented in the literature. We followed EB’s photobleaching via absorption spectroscopy in four different aqueous solvents, including pure water, phosphate, Tris and HEPES buffer. These buffer systems were selected because they are commonly used in biochem. and biol. applications. Our results show that specific buffer effects cannot be neglected. Indeed, the singlet oxygen quantum yield for EB is significantly different in HEPES compared to the other solvents. Furthermore, we showed that EB’s photoproduct is highly dependent on the nature of the chem. buffer being used. In the experiment, the researchers used many compounds, for example, Sodium 2′,4′,5′,7′-tetraiodo-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-bis(olate) (cas: 16423-68-0SDS of cas: 16423-68-0).

Sodium 2′,4′,5′,7′-tetraiodo-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-bis(olate) (cas: 16423-68-0) belongs to benzofurans derivatives. Benzofurans are compounds with a planar structure having 10 pi electrons that include the lone pair on oxygen atom, which makes it more susceptible to electrophilic attack. They are also prone to polymerisation in the presence of concentrated mineral acids and Lewis acids.SDS of cas: 16423-68-0

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Visible Light-Promoted Magnesium, Iron, and Nickel Catalysis Enabling C(sp³)-H Lactonization of 2-Alkylbenzoic Acids was written by Li, Sasa;Su, Mincong;Sun, Jie;Hu, Kunjun;Jin, Jian. And the article was included in Organic Letters in 2021.Formula: C9H8O3 This article mentions the following:

A mild and practical C(sp³)-H lactonization protocol has been achieved by merging photocatalysis and magnesium (iron, nickel) catalysis. A diverse range of 2-alkylbenzoic acids with a variety of substitution patterns could be transformed into the corresponding phthalide products. Based on the mechanistic experimentation and reported prior studies, a possible mechanism for the benzylic oxidative lactonization reaction was proposed with the hypothetic photoactive ternary complex formed between the 2-alkylbenzoic acid substrate, magnesium ion, and bromate anion. In the experiment, the researchers used many compounds, for example, 5-Methoxyisobenzofuran-1(3H)-one (cas: 4741-62-2Formula: C9H8O3).

5-Methoxyisobenzofuran-1(3H)-one (cas: 4741-62-2) belongs to benzofurans derivatives. Benzofuran is the “”parent”” of many related compounds with more complex structures. For example, psoralen is a benzofuran derivative that occurs in several plants. Substituted benzofurans find applications such as fluorescent sensors, oxidants, in drug discovery, and in another field of chemistry and agriculture.Formula: C9H8O3

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Characterisation of black carbon materials by pyrolysis-gas chromatography-mass spectrometry was written by Song, Jianzhong;Peng, Ping’an. And the article was included in Journal of Analytical and Applied Pyrolysis in 2010.COA of Formula: C16H10O This article mentions the following:

Pyrolysis-gas chromatog.-mass spectrometry (Py-GC-MS) was used to investigate the chem. structures of eight black carbon (BC) materials: hexane soot, gasoline soot, diesel soot, coal soot, grass soot, wood soot, grass charcoal and wood charcoal. Py-GC-MS data revealed that the pyrolytic products of the eight BC samples were all dominated in aromatic compounds, followed by smaller amounts of aliphatic compounds O-containing pyrolytic products were also present in all eight BC samples. The data suggest that the structures of eight BCs were composed of highly aromatic structures that were cross-linked by aliphatic chain-like bridges and/or O-containing polar functional groups. Owing to the different fuel precursors and combustion conditions, the eight BC materials also differed in many respects. The pyrolytic products from soot BCs contained higher amounts of N-containing compounds, reflecting the combustion conditions. S-containing compounds were only present in pyrolytic products from three fossil-fuel soots, and can be used as a marker for soot from fossil fuels. Charcoal BCs can retain some plant structure, containing significant amounts of typical lignin-derived phenolic compounds The results may be useful for interpretation of Py-GC-MS data for complicated BCs isolated from soils, sediments and aerosols. In the experiment, the researchers used many compounds, for example, Naphtho[2,1-b]benzofuran (cas: 205-39-0COA of Formula: C16H10O).

Naphtho[2,1-b]benzofuran (cas: 205-39-0) belongs to benzofurans derivatives. Benzofurans are only weakly aromatic in nature and they are cleaved by many oxidative and reductive conditions. Substituted benzofurans find applications such as fluorescent sensors, oxidants, in drug discovery, and in another field of chemistry and agriculture.COA of Formula: C16H10O

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Determination of trifolirhizin in Sophora flavescens Ait. by HPLC was written by Zhao, Yuezhen;Xiang, Daxiong. And the article was included in Zhongnan Yaoxue in 2008.COA of Formula: C22H22O10 This article mentions the following:

An HPLC method for the determination of trifolirhizin in Sophora flavescens Ait. was established. A column of HYPERSIL BDS C₁₈ (4.6 mm × 200 mm, 5 μm) was used. The mobile phase was composed of methanol and 0.2% phosphoric acid with a linear gradient elution from 10% to 40% methanol in 20 min. The flow rate was 1.0 mL/min^-1, and the detection wavelength was 310 nm. The calibration curve of trifolirhizin was in good linearity over the range of 0.446-8.920 μg, (r = 0.9999). The average recovery was 97.94%, and RSD was less than 1% (n = 6). The method is simple, sensitive, accurate, reproducible, and can be used to control the quality of Sophora flavescens Ait. In the experiment, the researchers used many compounds, for example, (2S,3R,4S,5S,6R)-2-(((6aR,12aR)-6a,12a-Dihydro-6H-[1,3]dioxolo[4′,5′:5,6]benzofuro[3,2-c]chromen-3-yl)oxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol (cas: 6807-83-6COA of Formula: C22H22O10).

(2S,3R,4S,5S,6R)-2-(((6aR,12aR)-6a,12a-Dihydro-6H-[1,3]dioxolo[4′,5′:5,6]benzofuro[3,2-c]chromen-3-yl)oxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol (cas: 6807-83-6) belongs to benzofurans derivatives. Benzofurans are compounds with a planar structure having 10 pi electrons that include the lone pair on oxygen atom, which makes it more susceptible to electrophilic attack. As benzofurans are prone to undergo ring opening of the heterocycle, examples of reduction of this type of aromatics by using dissolving metals are rather scarce.COA of Formula: C22H22O10

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Effect of prucalopride on sildenafil-induced inhibition of esophageal peristalsis in healthy adults was written by Wong, Ming-Wun;Liu, Tso-Tsai;Yi, Chih-Hsun;Hung, Jui-Sheng;Lei, Wei-Yi;Liang, Shu-Wei;Orr, William C.;Chen, Chien-Lin. And the article was included in Journal of Gastroenterology and Hepatology in 2021.Application of 179474-81-8 This article mentions the following:

Prucalopride, a high-affinity 5-hydroxytryptamine 4 receptor agonist, promotes esophageal peristalsis, while phosphodiesterase type 5 inhibitor sildenafil inhibits esophageal peristalsis. The present study was aimed to evaluate whether prucalopride would augment esophageal peristalsis subsequent to the application of sildenafil. Seventeen healthy adults underwent high-resolution manometry by a catheter with one injection port located in the mid-esophagus. Secondary peristalsis was assessed by rapid air injections after water swallows. Two sessions were randomly performed including acute administration of sildenafil 50 mg after pretreatment with prucalopride or the placebo. The frequency of primary peristalsis subsequent to the administration of sildenafil was significantly increased by prucalopride (P = 0.02). Prucalopride also significantly increased distal contractile integral of primary peristalsis subsequent to the administration of sildenafil (P = 0.03). No difference in the frequency of secondary peristalsis subsequent to the administration of sildenafil for air injects of 10 mL (P = 0.14) or 20 mL (P = 0.21) was found between prucalopride and placebo. Prucalopride did not change distal contractile integral of secondary peristalsis subsequent to the administration of sildenafil for air injections of 10 mL (P = 0.09) or 20 mL (P = 0.12). Prucalopride modulates sildenafil-induced inhibition of primary peristalsis by increasing its effectiveness and peristaltic wave amplitude. Our findings suggest that activation of 5-hydroxytryptamine 4 receptors plays a role in mediating sildenafil-induced inhibition of esophageal primary peristalsis rather than secondary peristalsis. In the experiment, the researchers used many compounds, for example, 4-Amino-5-chloro-N-(1-(3-methoxypropyl)piperidin-4-yl)-2,3-dihydrobenzofuran-7-carboxamide (cas: 179474-81-8Application of 179474-81-8).

4-Amino-5-chloro-N-(1-(3-methoxypropyl)piperidin-4-yl)-2,3-dihydrobenzofuran-7-carboxamide (cas: 179474-81-8) belongs to benzofurans derivatives. Benzofurans are only weakly aromatic in nature and they are cleaved by many oxidative and reductive conditions. Benzofurans are stable towards alkali and readily polymerize on treatment with sulfuric acid, due to which they are useful for the preparation of low cost chemically relatively inert resins.Application of 179474-81-8

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem

Highly Enantioselective Synthesis of 2,3-Dihydro-1H-imidazo[2,1-a]isoindol-5(9bH)-ones via Catalytic Asymmetric Intramolecular Cascade Imidization-Nucleophilic Addition-Lactamization was written by He, Yuwei;Cheng, Chuyu;Chen, Bin;Duan, Kun;Zhuang, Yue;Yuan, Bo;Zhang, Meisan;Zhou, Yougui;Zhou, Zihong;Su, Yu-Jun;Cao, Rihui;Qiu, Liqin. And the article was included in Organic Letters in 2014.Quality Control of 5-Methylisobenzofuran-1(3H)-one This article mentions the following:

Highly enantioselective catalytic asym. intramol. cascade imidization-nucleophilic addition-lactamization of N¹-alkylethane-1,2-diamine with Me 2-formylbenzoate catalyzed by a chiral phosphoric acid represents the first efficient method for the preparation of medicinally interesting chiral 2,3-dihydro-1H-imidazo[2,1-a]isoindol-5(9bH)-ones, e.g., I, with high yields and excellent enantioselectivities. This strategy has been shown to be quite general toward various Me 2-formylbenzoates. In the experiment, the researchers used many compounds, for example, 5-Methylisobenzofuran-1(3H)-one (cas: 54120-64-8Quality Control of 5-Methylisobenzofuran-1(3H)-one).

5-Methylisobenzofuran-1(3H)-one (cas: 54120-64-8) belongs to benzofurans derivatives. Benzofuran is a core structural unit found in many naturally occurring compounds with multidirectional biological activities. Benzofurans have also made significant and distinctive contributions to biology. They exhibit several biological activities that range from antioxidant, antitubercular, antiplasmodial, insecticidal.Quality Control of 5-Methylisobenzofuran-1(3H)-one

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem