Category: isoquinoline

Hao, Yining published the artcileEffect of static-state fermentation on volatile composition in rapeseed meal, Safety of 4-Methoxy-N-methylaniline, the main research area is rapeseed meal volatile composition static state fermentation; Tetramethylpyrazine; fermentation; rapeseed meal; volatile components.

BACKGROUND : Fermented rapeseed meal has been used as an alternative protein source for animal feed, but the volatile compounds and how their contents change during fermentation have not been reported. To clarify the effect of static-state fermentation on its aroma, the volatile compounds of rapeseed meal during different stages of fermentation were analyzed using an electronic nose system and headspace solid-phase microextraction-gas chromatog.-mass spectrometry. RESULTS : The results suggested that the volatile compounds in the raw rapeseed meal, mostly hydrocarbons and some aldehydes, were lost. The levels of the volatile compounds resulting from microbial metabolism, especially pyrazines, greatly increased during fermentation Nonanal was the dominant volatile measured in the headspace of raw rapeseed meal. However, the volatile compounds found at high concentrations in rapeseed meal after 5 days of fermentation were tetramethylpyrazine, followed by butanoic acid, benzenepropanenitrile, 2-methylbutanoic acid, trimethylamine, 2,3,5-trimethyl-6-ethylpyrazine, and 2,3,5-trimethylpyrazine. CONCLUSION : The fermentation process could significantly change the composition and content of volatile compounds in rapeseed meal. The results may provide reference data for studies on the choice of fermentation period and formation mechanism of flavor substances in fermented rapeseed meal.

Journal of the Science of Food and Agriculture published new progress about Bacillus subtilis. 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Safety of 4-Methoxy-N-methylaniline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Shen, Qing published the artcileVolatile compounds and antioxidant properties of pickled and dried mustard as influenced by different cooking methods, Synthetic Route of 21834-92-4, the main research area is pickled dried mustard volatile compound antioxidant steaming boiling microwaving.

Pickled and dried mustard (PDM; Brassica juncea, Coss), a traditional fermented vegetable product, is very popular in China because of its typical aromatic flavor and great antioxidant activity. PDM is usually consumed after being cooked by various cooking methods. Here, we determined and compared the effects of four different common cooking methods (steaming, high-pressure steaming, boiling, and microwaving) with different cooking time on the volatile compounds and antioxidant properties of PDM. The gas chromatog.-mass spectrometry results showed that steaming for 15 min and high-pressure steaming for 5 min significantly increased the concentration of volatile compounds of PDM while boiling and microwaving obviously decreased them. Moreover, high-pressure steaming best preserved the antioxidant activity, obtained from ABTS, DPPH, FRAP, and ORAC assays, as well as the total phenolic, flavonoid, and glucosinolate content of PDM. These findings provide insights into the beneficial effects of high-pressure steaming for 5 min in cooking PDM. Practical applications : Our findings showed that high-pressure steaming for short time (5 min) was the best way to cook PDM because it could not only significantly increase volatile compounds of PDM but also had the preservation effects of antioxidant activity of PDM. By contrast, boiling and microwaving dramatically decreased the volatile compounds and antioxidant properties of PDM mainly because of leaching action. These findings provide useful information for food producers and consumers to optimize the processing and cooking of PDM products with better flavor and health-related characteristics.

Journal of Food Processing and Preservation published new progress about Boiling (cooking). 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Synthetic Route of 21834-92-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Yang, Yu-Ting published the artcileFlame retardant and hydrophobic cotton using a unique phosphorus-nitrogen-silicon-containing coating, Computed Properties of 1455-77-2, the main research area is phosphorus nitrogen silicon flame retardant hydrophobic cotton coating.

Phosphorus-nitrogen-silicon-containing coatings consisting of tris(hydroxymethyl)phosphine oxide (THPO), 3,5-diamino-1,2,4-triazole (guanazole) and polydimethylsiloxane (PDMS) were prepared via a simple spraying deposition technique and applied to the cotton fabric to impart flame retardancy and hydrophobicity. SEM image reveals that THPO/Guanazole/PDMS-coated fabric has a rough surface and XPS spectra confirm the composition of the coating on the cotton surface. Direct flame testing indicates that the as-prepared coating can protect the cotton from burning. The limiting oxygen index increased from 18.0% for the uncoated fabric to 32.0% for the THPO/Guanazole-treated sample and 27.0% for the THPO/Guanazole/PDMS-treated sample. Furthermore, with addnl. THPO/Guanazole, there was a gradual reduction in PHRR values, 60% (79.0 kW/m2) for C2 and 76% (48.2 kW/m2) for C3 lower than that of untreated cotton. After hydrophobic treatment of C2 with PDMS, the PHRR is reduced to 127.5 kW/m2 (35.5% for C2-PDMS). Addnl., the coated cotton displays impressive hydrophobicity with a water contact angle of 133°. This unique approach provides a facile and effective flame retardant and hydrophobic treatment for cotton fabric.

Cellulose (Dordrecht, Netherlands) published new progress about Breaking strength. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Computed Properties of 1455-77-2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Yang, Yu-Ting published the artcileFlame retardant and hydrophobic cotton using a unique phosphorus-nitrogen-silicon-containing coating, Computed Properties of 1455-77-2, the main research area is phosphorus nitrogen silicon flame retardant hydrophobic cotton coating.

Phosphorus-nitrogen-silicon-containing coatings consisting of tris(hydroxymethyl)phosphine oxide (THPO), 3,5-diamino-1,2,4-triazole (guanazole) and polydimethylsiloxane (PDMS) were prepared via a simple spraying deposition technique and applied to the cotton fabric to impart flame retardancy and hydrophobicity. SEM image reveals that THPO/Guanazole/PDMS-coated fabric has a rough surface and XPS spectra confirm the composition of the coating on the cotton surface. Direct flame testing indicates that the as-prepared coating can protect the cotton from burning. The limiting oxygen index increased from 18.0% for the uncoated fabric to 32.0% for the THPO/Guanazole-treated sample and 27.0% for the THPO/Guanazole/PDMS-treated sample. Furthermore, with addnl. THPO/Guanazole, there was a gradual reduction in PHRR values, 60% (79.0 kW/m2) for C2 and 76% (48.2 kW/m2) for C3 lower than that of untreated cotton. After hydrophobic treatment of C2 with PDMS, the PHRR is reduced to 127.5 kW/m2 (35.5% for C2-PDMS). Addnl., the coated cotton displays impressive hydrophobicity with a water contact angle of 133°. This unique approach provides a facile and effective flame retardant and hydrophobic treatment for cotton fabric.

Cellulose (Dordrecht, Netherlands) published new progress about Breaking strength. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, Computed Properties of 1455-77-2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zhang, Huan published the artcileExperimental and Computational Studies of the Iron-Catalyzed Selective and Controllable Defluorosilylation of Unactivated Aliphatic gem-Difluoroalkenes, Quality Control of 1205-17-0, the main research area is fluoroalkene defluorosilylation iron catalysis silylalkene preparation stereoselective DFT; optimized mol structure fluoroalkene defluorosilylation iron catalyst silylalkene preparation; C−F bond cleavage; gem-disilylated alkenes; high selectivity; iron catalysis.

The 1st Fe-catalyzed defluorosilylation of unactivated gem-difluoroalkenes was developed, delivering gem-disilylated alkenes and (E)-silylated alkenes with excellent efficiency. This protocol features good functional group compatibility and excellent regio- and stereoselectivity, enabling the late-stage silylation of biol. relevant compounds, thus providing good opportunities for applications in medicinal chem. Preliminary mechanistic studies and DFT calculations reveal that a nucleophilic addition and elimination of the 2nd C-F bond might be involved in the disilylation catalytic system, demonstrating unusual reactivity characteristics of Fe catalysis.

Angewandte Chemie, International Edition published new progress about C-F bond cleavage. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Quality Control of 1205-17-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Guo, Zhiqiang published the artcileCO2-tuned highly selective reduction of formamides to the corresponding methylamines, Name: 4-Methoxy-N-methylaniline, the main research area is tertiary amine preparation; methylated formamide reduction carbon oxygen bond cleavage dioxide.

Herein an efficient, CO2-tuned and highly selective C-O bond cleavage of N-methylated formanilides is described. With easy-to-handle and com. available NaBH4 as the reductant, a variety of formanilides could be turned into the desired tertiary amines in moderate to excellent yields. The role of CO2 has been investigated in detail, and the mechanism is proposed on the basis of experiments

Green Chemistry published new progress about C-O bond cleavage. 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Name: 4-Methoxy-N-methylaniline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Anquandah, George published the artcileOxidation of X-ray compound diatrizoic acid by ferrate(VI), Product Details of C11H9I3N2O4, the main research area is oxidation Xray compound diatrizoate ferrate.

Iodinated x-ray contrast media (ICM) such as diatrizoic acid (DTZA) is used in large amounts in hospitals to enhance imaging of organs and blood vessels during radiog. Due to its persistence and non-biodegradability, it is found in treated water, sewage effluent, surface waters, and aquatic environments. This paper presents the kinetics of the oxidation of DTZA by ferrate(VI) (FeVIO42-, Fe(VI)) as a function of pH (7.1-9.6) at 25° in order to determine the effectiveness of Fe(VI) to remove DTZA from water. The reaction was 1st-order with respect to concentrations of Fe(VI) and DTZA. The rate of the reaction was pH-dependent and the rate decreased nonlinearly as the pH increased from 7.1 to 9.6. The speciation of Fe(VI) (HFeO4- and FeO42-) was used to explain the rate dependence on pH. The calculated rate constant of Fe(VI) with DTZA at pH 7.0 was compared with N-containing pollutants and is discussed.

Environmental Technology published new progress about Oxidation kinetics. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Product Details of C11H9I3N2O4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Gracious, Shabalala Nhlanhla published the artcileFacile one-pot green synthesis of 2-amino-4H-benzo[g]chromenes in aqueous ethanol under ultrasound irradiation, Related Products of isoquinoline, the main research area is aminobenzochromene preparation green ammonium acetate catalyst ultrasound irradiation; hydroxynaphthalenedione aldehyde three component condensation.

An efficient green one-pot approach for the synthesis of eighteen novel dihydro-4H-benzo[g]chromene derivatives under ultrasound irradiation conditions. The three-component condensation reaction proceeded through Knoevenagel-Michael reaction of chosen active methylene compounds and 2-hydroxynaphthalene-1,4-dione with different substituted aldehydes in the presence of ammonium acetate in water and ethanol mixture at room temperature, which furnished high yields of products (91-98%) in a rapid reaction time of 5-15 min. This procedure offers 95% of the atom economy and 100% of carbon efficiency together with other eco-friendly benefits.

Synthetic Communications published new progress about Acoustic emission. 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Pratali Maffei, Luna published the artcileElectronic structure-based rate rules for H ipso addition-elimination reactions on mono-aromatic hydrocarbons with single and double OH/CH3/OCH3/CHO/C2H5 substituents: a systematic theoretical investigation, COA of Formula: C8H10O2, the main research area is phenol toluene substitution reaction kinetics activation energy.

The recent interest in bio-oils combustion and the key role of mono-aromatic hydrocarbons (MAHs) in existing kinetic frameworks, both in terms of poly-aromatic hydrocarbons growth and surrogate fuels formulation, motivates the current systematic theor. investigation of one of the relevant reaction classes in MAHs pyrolysis and oxidation: ipso substitution by hydrogen. State-of-the-art theor. methods and protocols implemented in automatized computational routines allowed to investigate 14 different potential energy surfaces involving MAHs with hydroxy and Me single (phenol and toluene) and double (o-,m-,p-C6H4(OH)2, o-,m-,p-CH3C6H4OH, and o-,m-,p-C6H4(CH3)2) substituents, providing rate constants for direct implementation in existing kinetic models. The accuracy of the adopted theor. method was validated by comparison of the computed rate constants with the available literature data. Systematic trends in energy barriers, pre-exponential factors, and temperature dependence of the Arrhenius parameters were found, encouraging the formulation of rate rules for H ipso substitutions on MAHs. The rules here proposed allow to extrapolate from a reference system the necessary activation energy and pre-exponential factor corrections for a large number of reactions from a limited set of electronic structure calculations We were able to estimate rate constants for other 63 H ipso addn-elimination reactions on di-substituted MAHs, reporting in total 75 rate constants for H ipso substitution reactions o-,m-,p-R’C6H4R + H â†?C6H5R + R’, with R,R’ = OH/CH3/OCH3/CHO/C2H5, in the 300-2000 K range. Addnl. calculations performed for validation showed that the proposed rate rules are in excellent agreement with the rate constants calculated using the full computational protocol in the 500-2000 K range, generally with errors below 20%, increasing up to 40% in a few cases. The main results of this work are the successful application of automatized electronic structure calculations for the derivation of accurate rate constants for H ipso substitution reactions on MAHs, and an efficient and innovative approach for rate rules formulation for this reaction class.

Physical Chemistry Chemical Physics published new progress about Activation energy. 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, COA of Formula: C8H10O2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Niu, Hao-Xin published the artcileA Furan-based Phosphaphenanthrene-containing Derivative as a Highly Efficient Flame-retardant Agent for Epoxy Thermosets without Deteriorating Thermomechanical Performances, SDS of cas: 1455-77-2, the main research area is furan phosphaphenanthrene flame retardant agent epoxy thermoset; mech thermal property.

In order to reduce greenhouse gas emissions, developing flame retardants from bio-based resources has aroused extensive interest in recent years. In this work, we utilized furfural (biomass) and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) to synthesize a bio-based co-curing agent (FGD) to combine with 4,4′-diaminodiphenyl methane (DDM) for obtaining a low-phosphorus loading flame-retardant epoxy thermosets. The introduction of FGD decreased the activation energy of the curing progress, enhanced the mech. properties of the epoxy thermosets, and did not affect the glass transition temperature of the epoxy thermosets. EP-5.0 had a lower thermal degradation rate and a doubled char yield compared with EP-0. The phosphorus content of EP-5.0 was only 0.45 wt%, while EP-5.0 reached the UL-94 V-0 rating with a high LOI value of 32%. Compared with EP-0, the PHRR of EP-2.5 and EP-5.0 decreased by 22.3% and 31.3%, resp. The SEM results showed that the addition of FGD made the char residues more uniform and denser, which could effectively prevent combustible volatiles from escaping from the degradation area to the flame area and isolate the heat transfer so that the epoxy thermosets had an excellent flame-retardant performance.

Chinese Journal of Polymer Science published new progress about Activation energy. 1455-77-2 belongs to class isoquinoline, name is 3,5-Diamino-1,2,4-triazole, and the molecular formula is C2H5N5, SDS of cas: 1455-77-2.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem