Day: November 14, 2022

Wang, Weigang published the artcileOrganic compounds evolution and sludge properties variation along partial nitritation and subsequent anammox processes treating reject water, Safety of 2,3-Dimethoxybenzaldehyde, the main research area is organic compound sludge nitritation anammox wastewater treatment; Denitrification; Nitrogen removal; Organic compounds evolution; Partial nitritation-anammox; Reject water.

Reject water contains complex components of organic compounds, which have significant influences on the nitrogen removal performance when treated using biol. autotrophic nitrogen removal technol. In this study, a two-stage partial nitritation (PN)-anammox (floc-granule) system was established to treat reject water (COD/NH+4-N = 0.97 ± 0.15), and the evolution of organic compounds along PN and annamox bioreactors was investigated using gas chromatog.-mass spectrometry and excitation-emission matrix. Also, the variation of PN and anammox sludge properties relating to COD reduction was examined The PN-anammox system removed approx. 80% of total inorganic nitrogen and COD with hydraulic reaction time of 16 h. The influent organics (330-600 mg COD/L) in reject water were primarily composed of volatile, protein-like and humic acid-like organic compounds PN process contributed 53 ± 18% of the overall COD removal, primarily including oxygen-containing organics (e.g. phenol), proteins and humic acids. Anammox process contributed 22 ± 15% of the overall COD removal, but large mol. acids (e.g. lactic acid) and small mol. alcs. (e.g. glycerol) were reoccurred, contributing to the effluent COD with recalcitrant hydrocarbons (e.g. n-Octadecane). Reject water increased the extracellular proteins/polysaccharides ratio of PN and anammox sludge, promoting the adsorption and degradation of organic compounds High-throughput sequencing results showed that denitrifying bacteria of Ottowia increased from 0.03% to 14.4% in PN reactor, and of Denitratisoma increased from 9.6% to 15.4% in anammox reactor. The occurrence of these denitrifiers might mitigate the neg. impact of organics to functional organisms. This study highlights the organics fate during PN-anammox treatment system, which is important to maintain the robust nitrogen removal when treating organics-containing and high ammonium concentration wastewater.

Water Research published new progress about 16S rRNA Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Safety of 2,3-Dimethoxybenzaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

van Bergen, Tamara J. H. M. published the artcileDo initial concentration and activated sludge seasonality affect pharmaceutical biotransformation rate constants?, SDS of cas: 117-96-4, the main research area is activated sludge pharmaceutical biotransformation rate constant seasonality affect; Bacterial community; Kinetics; Nitrification; Organic micropollutants; Sorption; Wastewater treatment plants.

Pharmaceuticals find their way to the aquatic environment via wastewater treatment plants (WWTPs). Biotransformation plays an important role in mitigating environmental risks; however, a mechanistic understanding of involved processes is limited. The aim of this study was to evaluate potential relationships between first-order biotransformation rate constants (kb) of nine pharmaceuticals and initial concentration of the selected compounds, and sampling season of the used activated sludge inocula. Four-day bottle experiments were performed with activated sludge from WWTP Groesbeek (The Netherlands) of two different seasons, summer and winter, spiked with two environmentally relevant concentrations (3 and 30 nM) of pharmaceuticals. Concentrations of the compounds were measured by LC-MS/MS, microbial community composition was assessed by 16S rRNA gene amplicon sequencing, and kb values were calculated The biodegradable pharmaceuticals were acetaminophen, metformin, metoprolol, terbutaline, and phenazone (ranked from high to low biotransformation rates). Carbamazepine, diatrizoic acid, diclofenac, and fluoxetine were not converted. Summer and winter inocula did not show significant differences in microbial community composition, but resulted in a slightly different kb for some pharmaceuticals. Likely microbial activity was responsible instead of community composition In the same inoculum, different kb values were measured, depending on initial concentration In general, biodegradable compounds had a higher kb when the initial concentration was higher. This demonstrates that Michealis-Menten kinetic theory has shortcomings for some pharmaceuticals at low, environmentally relevant concentrations and that the pharmaceutical concentration should be taken into account when measuring the kb in order to reliably predict the fate of pharmaceuticals in the WWTP. Key points: • Biotransformation and sorption of pharmaceuticals were assessed in activated sludge. • Higher initial concentrations resulted in higher biotransformation rate constants for biodegradable pharmaceuticals. • Summer and winter inocula produced slightly different biotransformation rate constants although microbial community composition did not significantly change.

Applied Microbiology and Biotechnology published new progress about 16S rRNA Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, SDS of cas: 117-96-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Sadamitsu, Yuta published the artcileKolbe-Schmitt type reaction under ambient conditions mediated by an organic base, Computed Properties of 151-10-0, the main research area is salicylic acid preparation; resorcinol carbon dioxide DBU Kolbe Schmitt type reaction.

The combined use of an organic base for resorcinols realized a Kolbe-Schmitt type reaction under ambient conditions. When resorcinols (3-hydroxyphenol derivatives) were treated with DBU under a carbon dioxide atm., nucleophilic addition to carbon dioxide proceeded to afford the corresponding salicylic acid derivatives in high yields.

Chemical Communications (Cambridge, United Kingdom) published new progress about Hydroxycarboxylic acids Role: SPN (Synthetic Preparation), PREP (Preparation). 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, Computed Properties of 151-10-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Murugesan, Kathiravan published the artcileReusable Nickel Nanoparticles-Catalyzed Reductive Amination for Selective Synthesis of Primary Amines, Safety of 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, the main research area is primary amine preparation nickel nanoparticle catalyst; carbonyl compound ammonia mol hydrogen reductive amination; ammonia; carbonyl compounds; nickel nanoparticles; primary amines; reductive amination.

The preparation of nickel nanoparticles as efficient reductive amination catalysts by pyrolysis of in situ generated Ni-tartaric acid complex on silica is presented. The resulting stable and reusable Ni-nanocatalyst enables the synthesis of functionalized and structurally diverse primary benzylic, heterocyclic and aliphatic amines starting from inexpensive and readily available carbonyl compounds and ammonia in presence of mol. hydrogen. Applying this Ni-based amination protocol, -NH2 moiety can be introduced in structurally complex compounds, for example, steroid derivatives and pharmaceuticals.

Angewandte Chemie, International Edition published new progress about Carbonyl compounds (organic) Role: RCT (Reactant), RACT (Reactant or Reagent). 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Safety of 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Murugesan, Kathiravan published the artcileHomogeneous cobalt-catalyzed reductive amination for synthesis of functionalized primary amines, Application In Synthesis of 1205-17-0, the main research area is carbonyl compound ammonia cobalt catalyst reductive amination; primary amine preparation.

The combination of cobalt and linear-triphos (bis(2-diphenylphosphinoethyl)phenylphosphine) as the molecularly-defined non-noble metal catalyst for the synthesis of linear and branched benzylic, heterocyclic and aliphatic primary amines from carbonyl compounds, gaseous ammonia and hydrogen in good to excellent yields was reported. Noteworthy, this cobalt catalyst exhibited high selectivity and as a result the -NH2 moiety was introduced in functionalized and structurally diverse mols. An inner-sphere mechanism on the basis of the mono-cationic [triphos-CoH]+ complex as active catalyst was proposed and supported with d. functional theory computation on the doublet state potential free energy surface and H2 metathesis was found as the rate-determining step.

Nature Communications published new progress about Carbonyl compounds (organic) Role: RCT (Reactant), RACT (Reactant or Reagent). 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Application In Synthesis of 1205-17-0.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Hirai, Takahiro published the artcileEsterification of Tertiary Amides: Remarkable Additive Effects of Potassium Alkoxides for Generating Hetero Manganese-Potassium Dinuclear Active Species, Quality Control of 5961-59-1, the main research area is esterification tertiary amide potassium alkoxide manganese dinuclear catalyst; amides; esterification; manganese; reaction intermediates; reaction mechanisms.

A catalyst system of mononuclear manganese precursor combined with potassium alkoxide served as a superior catalyst compared with our previously reported manganese homodinuclear catalyst (defined within) for esterification of not only tertiary aryl amides, but also tertiary aliphatic amides. On the basis of stoichiometric reactions of a manganese precursor and potassium alkoxide salt, kinetic studies, and d. functional theory (DFT) calculations, we clarified a plausible reaction mechanism in which in situ generated manganese-potassium heterodinuclear species cooperatively activates the carbonyl moiety of the amide and the OH moiety of the alcs. We also revealed details of the reaction mechanism of our previous manganese homodinuclear system, and we found that the activation free energy (ΔG≠) for the manganese-potassium heterodinuclear complex catalyzed esterification of amides is lower than that for the manganese homodinuclear system, which was consistent with the exptl. results. We further applied our catalyst system to deprotect the acetyl moiety of primary and secondary amines.

Chemistry – A European Journal published new progress about Amides, aliphatic Role: RCT (Reactant), RACT (Reactant or Reagent) (tertiary). 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, Quality Control of 5961-59-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Uehara, Ayaka published the artcileDirect and Selective C-H Carbamoylation of (Hetero)aromatics with TMSOTf-Activated Carbamoyl Chloride, Recommanded Product: 1,3-Dimethoxybenzene, the main research area is regioselective carbamoylation aromatic heteroaromatic trimethylsilyl triflate carbamoyl chloride.

Exploiting trimethylsilyl trifluoromethanesulfonate as Lewis acid, (hetero)aromatics underwent regioselective and direct carbamoylation. The method is based on the in situ generation of a highly electrophilic carbamoyl triflate active species. Thus, e.g., resorcinol di-Me ether + dimethylcarbamoyl chloride → 2,4-dimethoxy-N,N-dimethylbenzamide (80%) in presence of TMSOTf in MeNO2.

European Journal of Organic Chemistry published new progress about Amides Role: SPN (Synthetic Preparation), PREP (Preparation) (heteroaromatic). 151-10-0 belongs to class isoquinoline, name is 1,3-Dimethoxybenzene, and the molecular formula is C8H10O2, Recommanded Product: 1,3-Dimethoxybenzene.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Silyanova, Eugenia A. published the artcileFormation of 3,4-Diarylpyrrole- and Pyrrolocoumarin Core of Natural Marine Products via Barton-Zard Reaction and Selective O-Demethylation, COA of Formula: C9H10O3, the main research area is diarylpyrrole pyrrolocoumarin lamellarin core preparation Barton Zard selective demethylation.

A metal-free approach to 3,4-diarylpyrrole-2-carboxylate and pyrrolocoumarin cores of lamellarins and related natural products based on Barton-Zard reaction of nitrostilbenes with Et isocyanoacetate was developed. In the case of diarylpyrrole-2-carboxylates with a 3-(o-methoxyphenyl) fragment, treatment with 1 equivalent of BBr3 resulted in selective O-demethylation of the ortho-methoxy group, while other methoxy groups in the mol. remained intact. The resulting 3-(2-hydroxyphenyl)pyrrole-2-carboxylates underwent base-induced lactonization to form the target pyrrolocoumarins.

European Journal of Organic Chemistry published new progress about Alkaloids Role: SPN (Synthetic Preparation), PREP (Preparation) (lamellarins). 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, COA of Formula: C9H10O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Ding, Yongbo published the artcileHypolipidemic effects of lipid-lowering granulated tea preparation from Monascus-fermented grains (adlay and barley bran) mixed with lotus leaves on Sprague-Dawley rats fed a high-fat diet, Application of 5-Methyl-2-phenylhex-2-enal, the main research area is Monascus fermented grain hypolipidemia tea leaf high fat diet.

In this study, we used adlay and barley bran as substrates to prepare Monascus-fermented grains and discussed the optimum conditions for monacolin K production Box-Behnken design results showed that the predicted maximum monacolin K yield (112.649 mg/kg) was close to the exptl. value (110.556 ± 17.17 mg/kg) under optimum conditions (fermentation temperature, 28.76 °C; inoculation amount, 7.81%; and solid substrate concentration, 38.75 g/250 mL). We investigated the hypolipidemic effects of the lipid-lowering granulated tea preparation from Monascus-fermented grains (adlay and barley bran) mixed with lotus leaves enriched with bioactive mevinolins (natural statins) in hyperlipidemic rats for 7 wk. Results showed that the lipid-lowering granulated tea decreased the body weight gain, serum total cholesterol (TC) and triglyceride (TG) levels, atherogenic index, and liver TC and TG levels. The preparation also increased the cecal weight, surface area, and content weight, as well as the concentrations of butyric acid. Furthermore, the preparation affected the intestinal microbiota and the liver.

Journal of Functional Foods published new progress about Alkaloids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Application of 5-Methyl-2-phenylhex-2-enal.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Chun, Jianlin published the artcileVisible-Light Photoredox-Catalyzed Tandem Trifluoro-methylation/Cyclization/Remote Oxidation of 1,6-Dienes: Access to CF3-Containing Five-Membered Heterocycles, Name: 2,3-Dimethoxybenzaldehyde, the main research area is propenyloxypropene togni iridium catalyst photochem trifluoromethylation heterocyclization oxidation; trifluoroethyl oxolane carbaldehyde diastereoselective regioselective green chem; bispropenyl toulenesulfonamide togni iridium catalyst photochem trifluoromethylation heterocyclization oxidation; tosyl trifluoroethyl pyrrolidine carbaldehyde diastereoselective regioselective green chem.

A visible-light photoredox-catalyzed tandem trifluoromethylation/cyclization/remote oxidation of 1,6-dienes was achieved. A broad range of trifluoromethyl group-containing tetrahydrofurans or tetrahydropyrroles were generated in good yields and with excellent diastereoselectivity by using DMSO (DMSO) as the oxidant. The mild and facile protocol afforded direct access to trifluoromethyl group-bearing tetrahydrofurans and tetrahydropyrroles via difunctionalization of olefins.

Advanced Synthesis & Catalysis published new progress about Alkadienes, heteroalkadienes Role: RCT (Reactant), RACT (Reactant or Reagent). 86-51-1 belongs to class isoquinoline, name is 2,3-Dimethoxybenzaldehyde, and the molecular formula is C9H10O3, Name: 2,3-Dimethoxybenzaldehyde.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem