Month: November 2022

He, Xue-mei published the artcileChemical constituents from the root bark of Morus atropurpurea, Computed Properties of 56317-21-6, the publication is Xiandai Shipin Keji (2014), 30(6), 219-228, 300, database is CAplus.

Mulberry root bark (Sang Bai Pi) was a kind of traditional Chinese medicine which showed hypotensive, antiviral bacteriostatic and anti-inflammatory activities. In order to explore the material basis of pharmacol. activity of mulberry root bark, the chem. constituents of the root bark from Moms atropurpurea was studied in this paper. Fifteen compounds were isolated from the root bark by silica gel, Sephadex LH-20, ODS and PHPLC column chromatog. Their structures were identified by physicochem. properties and spectral anal. as kuwanon A (1), kuwanon B (2), kuwanon C (3), kuwanon T (4), cyclomorusin (5), moracin M (6), moracin O (7), moracin P (8), mulberrofuran L (9), albanin A (10), australone A (11), 5′-(1”’,1”’-dimethylallyl)-8-(3″,3″-dimethylallyl)-2′,4′,5,7-tetrahydroxyfla-vone (12), 5,7-dihydroxycoumarin (13), oxyresceratrol (14) and β-daucosterol (15), resp. Fifteen compounds contained eight prenylflavonoids, four 2-arylbenzofuran, one coumarin, one stilbene and one sterol. Moreover, compounds 1-4 and 7-13 were firstly found from Moms atropurpurea.

Xiandai Shipin Keji published new progress about 56317-21-6. 56317-21-6 belongs to benzofurans, auxiliary class Metabolic Enzyme,PDE,Natural product, name is 5-(6-Hydroxybenzofuran-2-yl)benzene-1,3-diol, and the molecular formula is C14H10O4, Computed Properties of 56317-21-6.

Referemce:
https://en.wikipedia.org/wiki/Benzofuran,
Benzofuran | C8H6O – PubChem

Wen, Chang published the artcileHighly Efficient Synthesis of 2-Substituted Benzo[ b ]furan Derivatives from the Cross-Coupling Reactions of 2-Halobenzo[ b ]furans with Organoalane Reagents, COA of Formula: C8H5IO, the publication is Synthesis (2021), 53(20), 3847-3861, database is CAplus.

A highly efficient and simple route for the synthesis of benzo[ b]furans was developed by palladium-catalyzed cross-coupling reaction of 2-halobenzo[ b]furans with aryl, alkynyl, and alkylaluminum reagents. Various 2-aryl-, 2-alkynyl-, and 2-alkyl benzo[ b]furans was obtained in 23-97% isolated yields using 2-3 mol% PdCl 2/4-6 mol% XantPhos as the catalyst under mild reaction conditions. The aryls beared electron-donating or electron-withdrawing groups in 2-halobenzo[ b]furans gave products in 40-97% isolated yields. In addition, aluminum reagents containing thienyl, furanyl, trimethylsilanyl, and benzyl groups worked efficiently with 2-halobenzo[ b]furans as well, and three bioactive mols. with benzo[ b]furans skeleton were synthesized. Furthermore, the broad substrates scope and the typical maintenance of vigorous efficiency on gram scale made this protocol a potentially practical method to synthesize benzo[ b]furans. On the basis of the exptl. results, a possible catalytic cycle was proposed.

Synthesis published new progress about 69626-75-1. 69626-75-1 belongs to benzofurans, auxiliary class Iodide,Benzofuran, name is 2-Iodobenzofuran, and the molecular formula is C22H32O2, COA of Formula: C8H5IO.

Referemce:
https://en.wikipedia.org/wiki/Benzofuran,
Benzofuran | C8H6O – PubChem

Mann, Inderjit S. published the artcileTransition metal-directed synthesis of moracin M, a phytoalexin of Morus alba Linn, Safety of 2-Iodobenzofuran, the publication is Tetrahedron (1991), 47(37), 7981-90, database is CAplus.

2-(5-Resorcinyl)benzofurans have been synthesized by the Pd-catalyzed cross-coupling of 2-trimethylstannyl- or 2-bromozincbenzofurans with functionalized 5-iodoresorcinols. These were synthesized by the triisopropylsilyloxy-directed remote (C-5) lithiation/iodination of the O,O-bis(triisopropylsilyl)resorcinoltricarbonylchrhomium(0) complex. The method was applied to the synthesis of moracin M (I).

Tetrahedron published new progress about 69626-75-1. 69626-75-1 belongs to benzofurans, auxiliary class Iodide,Benzofuran, name is 2-Iodobenzofuran, and the molecular formula is C8H5IO, Safety of 2-Iodobenzofuran.

Referemce:
https://en.wikipedia.org/wiki/Benzofuran,
Benzofuran | C8H6O – PubChem

Czyz, M. L. published the artcileA visible-light photocatalytic thiolation of aryl, heteroaryl and vinyl iodides, Category: benzofurans, the publication is Organic & Biomolecular Chemistry (2018), 16(9), 1543-1551, database is CAplus and MEDLINE.

The general catalytic synthesis of aryl and vinyl thioethers from readily available halides remains a challenge. Herein we report a unified method for the thiolation of aryl and vinyl iodides with dialkyl disulfides using visible light photoredox catalysis. A range of thioether products bearing diverse functional groups can be accessed in high yield and with excellent chemoselectivity. We demonstrate the versatility of this method through the expedient synthesis of a family of thioether-rich natural products. A detailed investigation of the photocatalytic mechanism is presented from both steady-state and time-resolved luminescent quenching as well as transient absorption spectroscopy experiments

Organic & Biomolecular Chemistry published new progress about 69626-75-1. 69626-75-1 belongs to benzofurans, auxiliary class Iodide,Benzofuran, name is 2-Iodobenzofuran, and the molecular formula is C8H5IO, Category: benzofurans.

Referemce:
https://en.wikipedia.org/wiki/Benzofuran,
Benzofuran | C8H6O – PubChem

Liu, Huitao published the artcileQuantitative structure-property relationship study on the determination of binding constant by fluorescence quenching, Application In Synthesis of 596-01-0, the publication is Central European Journal of Chemistry (2009), 7(1), 59-65, database is CAplus.

Models to predict binding constant (logK) to bovine serum albumin (BSA) should be very useful in the pharmaceutical industry to help speed up the design of new compounds, especially as far as pharmacokinetics is concerned. We present here an extensive list of logK binding constants for thirty-five compounds to BSA determined by florescence quenching from the literature. These data have allowed us the derivation of a quant. structure-property relationship (QSPR) model to predict binding constants to BSA of compounds on the basis of their structure. A stepwise multiple linear regression (MLR) was performed to build the model. The statistical parameter provided by the MLR model (R = 0.9200, RMS = 0.3305) indicated satisfactory stability and predictive ability for the model. Using florescence quenching spectroscopy, we also exptl. determined the binding constants to BSA for two bioactive components in traditional Chinese medicines. Using the proposed model it was possible to predict the binding constants for each, which were in good agreement with the exptl. results. This QSPR approach can contribute to a better understanding of structural factors of the compounds responsible for drug-protein interactions, and be useful in predicting the binding constants of other compounds

Central European Journal of Chemistry published new progress about 596-01-0. 596-01-0 belongs to benzofurans, auxiliary class Benzofuran,Naphthalene,Alcohol,Ester, name is 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one, and the molecular formula is C28H18O4, Application In Synthesis of 596-01-0.

Referemce:
https://en.wikipedia.org/wiki/Benzofuran,
Benzofuran | C8H6O – PubChem

Wang, Ya-Ping published the artcileStudy on the interaction of 3,3-bis(4-hydroxy-1-naphthyl)-phthalide with bovine serum albumin by fluorescence spectroscopy, Synthetic Route of 596-01-0, the publication is Journal of Photochemistry and Photobiology, A: Chemistry (2006), 177(1), 6-11, database is CAplus.

The interaction between 3,3-bis(4-hydroxy-1-naphthyl)-phthalide (NPP) and bovine serum albumin (BSA) have been studied by fluorescence spectroscopy. The binding of NPP quenches the BSA fluorescence. By the fluorescence quenching results, it was found that the binding constant K = 5.30 × 10⁴ L mol^-1, and number of binding sites n = 0.9267. In addition, according to the synchronous fluorescence spectra of BSA, the results showed that the fluorescence spectra of BSA mainly originate from the tryptophan residues. Finally, the distance between the acceptor NPP and BSA was estimated to be 1.94 nm using Foester’s equation on the basis of fluorescence energy transfer. The interaction between NPP and BSA has been verified as consistent with the static quenching procedure and the quenching mechanism is related to the energy transfer.

Journal of Photochemistry and Photobiology, A: Chemistry published new progress about 596-01-0. 596-01-0 belongs to benzofurans, auxiliary class Benzofuran,Naphthalene,Alcohol,Ester, name is 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one, and the molecular formula is C8H14O2, Synthetic Route of 596-01-0.

Referemce:
https://en.wikipedia.org/wiki/Benzofuran,
Benzofuran | C8H6O – PubChem

Qiao, Zongjun published the artcileDirect Cross-Coupling Access to Diverse Aromatic Sulfide: Palladium-Catalyzed Double C-S Bond Construction Using Na₂S₂O₃ as a Sulfurating Reagent, Quality Control of 69626-75-1, the publication is Organic Letters (2014), 16(4), 1212-1215, database is CAplus and MEDLINE.

The Pd-catalyzed cross-coupling of aryl halides, alkyl halides, and Na₂S₂O₃·5H₂O to deliver aromatic thioethers is described. Pyridine, furan, thiophene, benzofuran, benzoxazole, benzothiophene, benzothiazole, and pyrazine are all amenable to this protocol. The odorless and stable solid Na₂S₂O₃·5H₂O was used as a convenient and environmentally friendly source of sulfur. Pd-catalyzed cross-couplings without thiols or thiophenols to build C-S bonds have not previously been achieved, which renders our observation more striking. Thus, e.g., PdCl₂(dppf)/dppf-catalyzed cross coupling of 4-(MeCO)C₆H₄I with nBu-Cl using Na₂S₂O₃·5H₂O and Cs₂CO₃ as base in DMSO/glycol afforded 4-(MeCO)C₆H₄SBu-n in 88% yield.

Organic Letters published new progress about 69626-75-1. 69626-75-1 belongs to benzofurans, auxiliary class Iodide,Benzofuran, name is 2-Iodobenzofuran, and the molecular formula is C8H5IO, Quality Control of 69626-75-1.

Referemce:
https://en.wikipedia.org/wiki/Benzofuran,
Benzofuran | C8H6O – PubChem

Sangu, Kenichiro published the artcileIntermolecular addition reaction to alkenes of acylmolybdenum complexes generated by oxidative addition of aryl or alkenyl halides with molybdenum(0) carbonyl complexes, Formula: C8H5IO, the publication is Synlett (2007), 929-933, database is CAplus.

Acylmolybdenum species, generated by oxidative addition of aryl or alkenyl halides with molybdenum(0) carbonyl complex followed by carbon monoxide insertion, added to various kinds of alkenes intermolecularly to give simple addition products in good yields without formation of carbonylative Heck-type products.

Synlett published new progress about 69626-75-1. 69626-75-1 belongs to benzofurans, auxiliary class Iodide,Benzofuran, name is 2-Iodobenzofuran, and the molecular formula is C8H5IO, Formula: C8H5IO.

Referemce:
https://en.wikipedia.org/wiki/Benzofuran,
Benzofuran | C8H6O – PubChem

Uzumasa, Yasumitsu published the artcileSpectrochemical studies of mixed indicators. II. Absorption spectra of some new mixed indicators in their color-change intervals, Product Details of C28H18O4, the publication is Nippon Kagaku Kaishi (1921-47) (1938), 24-8, database is CAplus.

cf. C. A. 31, 8375.5. The color change of the 5 mixtures, (1) m-cresol purple + xylenol blue, (2) m-cresol purple + thymol blue, (3) xylenol blue + cresolphthalein, (4) α-naphtholphthalein + m-cresol blue, (5) α-naphtholphthalein + cresol red, has been determined in different p_H ranges spectroscopically. It has been shown that the absorption curves of the mixtures can be constructed from those of the components.

Nippon Kagaku Kaishi (1921-47) published new progress about 596-01-0. 596-01-0 belongs to benzofurans, auxiliary class Benzofuran,Naphthalene,Alcohol,Ester, name is 3,3-Bis(4-hydroxynaphthalen-1-yl)isobenzofuran-1(3H)-one, and the molecular formula is C7H7BClFO3, Product Details of C28H18O4.

Referemce:
https://en.wikipedia.org/wiki/Benzofuran,
Benzofuran | C8H6O – PubChem

Fu, Wai Chung published the artcileRegioselective Synthesis of Polycyclic and Heptagon-embedded Aromatic Compounds through a Versatile π-Extension of Aryl Halides, Application of 2-Iodobenzofuran, the publication is Angewandte Chemie, International Edition (2017), 56(25), 7166-7170, database is CAplus and MEDLINE.

A versatile π-extension reaction was developed based on the three-component cross-coupling of aryl halides, 2-haloarylcarboxylic acids, and norbornadiene. The transformation is driven by the direction and subsequent decarboxylation of the carboxyl group, while norbornadiene serves as an ortho-C-H activator and ethylene synthon via a retro-Diels-Alder reaction. Comprehensive DFT calculations were performed to account for the catalytic intermediates.

Angewandte Chemie, International Edition published new progress about 69626-75-1. 69626-75-1 belongs to benzofurans, auxiliary class Iodide,Benzofuran, name is 2-Iodobenzofuran, and the molecular formula is C8H5IO, Application of 2-Iodobenzofuran.

Referemce:
https://en.wikipedia.org/wiki/Benzofuran,
Benzofuran | C8H6O – PubChem