Day: November 18, 2022

Gavezzotti, Angelo published the artcileMolecular dynamics simulation of organic crystals: introducing the CLP-dyncry environment, Application of 1-Methylurea, the main research area is organic crystal Coulomb potential hydrogen bond radial distribution function.

The CLP-dyncry mol. dynamics (MD) program suite and force field environment is introduced and validated with its ad hoc features for the treatment of organic crystalline matter. The package, stemming from a preliminary implementation on organic liquids (Gavezzotti & Lo Presti, 2019), includes modules for the preliminary generation of mol. force field files from ab initio derived force constants, and for the preparation of crystalline simulation boxes from general crystallog. information, including Cambridge Structural Database CIFs. The intermol. potential is the atom-atom Coulomb-London-Pauli force field, well tested as calibrated on sublimation enthalpies of organic crystals. These products are then submitted to a main MD module that drives the time integration and produces dynamic information in the form of coordinate and energy trajectories, which are in turn processed by several kinds of crystal-oriented analytic modules. The whole setup is tested on a variety of bulk crystals of rigid, non-rigid and hydrogen-bonded compounds for the reproduction of radial distribution functions and of crystal-specific collective orientational variables against X-ray data. In a series of parallel tests, some advantages of a dedicated program as opposed to software more oriented to biomol. simulation (Gromacs) are highlighted. The different and improved view of crystal packing that results from joining static structural information from X-ray anal. with dynamic upgrades is also pointed out. The package is available for free distribution with I/O examples and Fortran source codes.

Journal of Applied Crystallography published new progress about Bond angle (hydrogen bond). 598-50-5 belongs to class isoquinoline, name is 1-Methylurea, and the molecular formula is C2H6N2O, Application of 1-Methylurea.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Ankudinov, Nikita M. published the artcileSynthesis of Rhodium Complexes with Chiral Diene Ligands via Diastereoselective Coordination and Their Application in the Asymmetric Insertion of Diazo Compounds into E-H Bonds, Recommanded Product: 4-Methoxyphenylacetic acid, the main research area is rhodium chiral diene complex preparation catalyst borylation silylation amination; crystal structure rhodium chiral fluorobenzobarrelene diene dimeric complex; mol structure rhodium chiral fluorobenzobarrelene diene dimeric complex; borane silane asym insertion diazoester diene rhodium catalyst; DFT calculations; carbene insertion; diene ligands; rhodium complexes.

A new method for the synthesis of chiral diene Rh catalysts is introduced. The readily available racemic tetrafluorobenzobarrelene complexes [(R2-TFB)RhCl]2 were separated into two enantiomers via selective coordination of one of them with the auxiliary S-salicyl-oxazoline ligand. One of the resulting chiral complexes with an exceptionally bulky diene ligand [(R,R-iPr2-TFB)RhCl]2 was an efficient catalyst for the asym. insertion of diazoesters into B-H and Si-H bonds giving the functionalized organoboranes and silanes with high yields (79-97%) and enantiomeric purity (87-98% ee). The stereoselectivity of separation via auxiliary ligand and that of the catalytic reaction was predicted by DFT calculations

Angewandte Chemie, International Edition published new progress about Amination, stereoselective. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Recommanded Product: 4-Methoxyphenylacetic acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Su, Yuan-Hsiao published the artcileSolution-phase parallel synthesis and screening of anti-tumor activities from fenbufen and ethacrynic acid libraries, Application In Synthesis of 117-96-4, the main research area is solution phase parallel synthesis fenbufen ethacrynic acid library preparation; amidation fenbufen ethacrynic amine carboxylic acid reactant; fenbufen ethacrynic acid library preparation antitumor agent.

The derivatives with fenbufen and ethacrynic acid core compounds was synthesized through a facial preparation of 1-amino-4-azidobutane. The subsequent coupling with 102 members of carboxylic acids afforded amide products. The in situ screening using colorimetric assay with 3-(4.5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide showed that fenbufen but not ethacrynic acid Bu amide members displayed the cytotoxicities to tumor cells substantially, including two human cell lines (MCF7 and A549) and two murine cell lines (C26 and TRAMP-C1). Three fenbufen analogs, e.g. I, II and III, were found to have a good anti-tumor activity comparable to cisplatin.

Bioorganic & Medicinal Chemistry Letters published new progress about Amidation (vs bioactivity). 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Application In Synthesis of 117-96-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Gonder, Zeren Beril published the artcileDetailed characterization, antibiotic resistance and seasonal variation of hospital wastewater, Safety of Diatrizoic Acid, the main research area is micro pollutant antibiotic resistance hospital wastewater; Antibiotic resistance; Characterization; Hospital wastewater; Micro-pollutants; Seasonal variation.

This study investigates the presence of the different classes of micro-pollutants such as pharmaceutical active compounds (PhACs) (20 antibiotics, 8 analgesics and anti-inflammatories, 5 cytostatic agents, 7 β-blockers, 4 lipid regulators, 13 psychiatrics, 1 antidiabetic, 1 receptor antagonist, 1 local anesthetic, 1 antihypertensive and their 5 metabolites), hormones (8 compounds), X-ray contrast agents (6 compounds), benzotriazoles (3 compounds) and pesticides (6 compounds), and antibiotic resistance in hospital wastewater (HWW) of a medical faculty in Istanbul, Turkey. In addition, the seasonal variations of the selected PhACs and X-ray contrast agents and antibiotic resistance were evaluated for 2 years in a total of eight samples. In the PhACs, sulfamethoxazole and its metabolite (4 N-acethyl-sulfamethoxazole) in the antibiotic group and paracetamol in the analgesic and anti-inflammatory group were found at 100% of frequency and the highest concentrations as 35, 43 and 210μg/L, resp. The mean concentrations of psychiatric compounds were found less than 0.25μg/L except carbamazepine (1.36μg/L). Bisphenol A in hormone group had the highest concentration up to 14μg/L. In the hormone group compounds, 17-α-Ethinylestradiol and 17-β-Estradiol were detected at lower mean concentrations of 0.2 and 0.05μg/L, resp. 1H-benzotriazole had the highest concentration with the mean concentration of 24.8μg/L in benzotriazole group compounds The compounds in X-ray contrast agents group were noted as compounds detected at the highest concentration in HWW up to 3000μg/L. Antibiotic resistance against azithromycin, clindamycin and trimethoprim-sulfamethoxazole antibiotics was observed around 50% in the winter period. The seasonal variation was detected for the most of the investigated PhACs, especially in antibiotic group which was in line with those significant differences in antibiotic resistance rates in the studied antibiotics between winter and summer seasons.

Environmental Science and Pollution Research published new progress about Achromobacter xylosoxidans. 117-96-4 belongs to class isoquinoline, name is Diatrizoic Acid, and the molecular formula is C11H9I3N2O4, Safety of Diatrizoic Acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Al-Dalali, Sam published the artcileCharacterization and Comparison of Aroma Profiles and Aroma-Active Compounds between Traditional and Modern Sichuan Vinegars by Molecular Sensory Science, Related Products of isoquinoline, the main research area is aroma compound Sichuan vinegar; GC-MS; GC-O; SAFE; Sichuan vinegar; aromas; molecular sensory science; reconstitution.

Aroma profiles and aroma-active compounds of Sichuan vinegar, which is one of the four famous vinegars in China, were systemically analyzed by solvent-assisted flavor evaporation-gas chromatog.-mass spectrometry (SAFE-GC-MS) and gas chromatog.-olfactometry (GC-O). In addition, descriptive profile anal., aroma reconstitution, and omission test were used to evaluate and compare the Sichuan modern vinegar (SMV) and Sichuan traditional vinegar (STV). A total of 99 volatile compounds were tentatively identified from the neutral and acidic fractions of both samples. Among them, 77 compounds were pos. identified after comparison with their corresponding standards Forty-two aroma-active compounds were characterized with flavor dilution (FD) factors from 1 to 6561 by aroma extract dilution assay (AEDA)-GC-O, with the highest for 2-hydroxy-3-butanone, butyrolactone, furan-2-carbaldehyde, acetic acid, and 3-oxobutan-2-yl acetate in both STV and SMV samples. Among them, 10 were identified for the first time in vinegar. Moreover, 40 aroma-active compounds were quant. determined, and 26 compounds exhibited their odor activity values (OAVs) larger than 1. The reconstituted solutions showed similar aroma profiles to the original samples in their characteristic aromas in terms of fruity, sweet, roasty, spicy, and woody notes but had slight differences in nutty and herbal notes.

Journal of Agricultural and Food Chemistry published new progress about Odor and Odorous substances. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zheng, Xuexue published the artcileCharacterization of key aroma compounds and relationship between aroma compounds and sensory attributes in different aroma types of Fu brick tea, COA of Formula: C8H10O2, the main research area is Fu brick tea aroma compound sensory agent; (E,E)-2,4-nonadienal (PubChem CID: 5283339).; (E,Z)-2,6-nonadienal (PubChem CID: 643731); Benzyl alcohol (PubChem CID: 244); Different aroma types; Fu brick tea; Key aroma compounds; Multivariate statistical analysis; Sensory attributes; acetophenone (PubChem CID: 7410); dihydro-β-ionone (PubChem CID: 519382); hexanal (PubChem CID: 6184); linalool (PubChem CID: 6549); nerolidol (PubChem CID: 5284507); α-terpineol (PubChem CID: 17100); β-ionone (PubChem CID: 5352481).

Aroma is one of the most important sensory properties of tea. Floral-fungal aroma type, ripe-fungal aroma type and fresh-fungal aroma type were the main aroma types of Fu brick tea by QDA. A total of 112 volatile compounds were identified and quantified in tea samples by HS-SPME/GC-MS anal. Ten voaltiles in floral-fungal aroma type, eleven voaltiles in ripe-fungal aroma type, and eighteen voaltiles in fresh-fungal aroma type were identified as key aroma compounds for the aroma characteristics formation in three aroma types of Fu brick tea. In addition, PLS anal. revealed that 3,4-dehydro-β-ionone, dihydro-β-ionone, (+)-carotol and linalool oxide II were the key contributors to the ′floral and fruity′ attribute, α-terpineol contributed to woody and stale attributes, and thirteen aroma compounds related to green attribute. Taken together, these findings will provide new insights into the formation mechanism of different aroma characteristics in Fu brick tea.

Food Chemistry: X published new progress about Odor and Odorous substances. 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

Babin, Victor published the artcilePhotochemical Strategy for Carbon Isotope Exchange with CO2, Name: 4-Methoxyphenylacetic acid, the main research area is photochem strategy carbon isotope exchange CO2.

A photocatalytic approach for carbon isotope exchange is reported. Utilizing [13C]CO2 and [14C]CO2 as primary C1 sources, this protocol allows the insertion of the desired carbon isotope into Ph acetic acids without the need for structural modifications or prefunctionalization in one single step. The exceptionally mild conditions required for this traceless transformation are in stark contrast with those for previous methods requiring the use of harsh thermal conditions.

ACS Catalysis published new progress about Exchange reaction (isotope). 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Name: 4-Methoxyphenylacetic acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Haykal, Tarek published the artcileSafety and efficacy of aspirin for primary prevention of cancer: a meta-analysis of randomized controlled trials, Quality Control of 104-01-8, the main research area is meta analysis cancer aspirin safety efficacy; Aspirin; Bleeding; Cancer; Primary prevention.

Meta-anal. of In the United States, cancer is the second leading cause of mortality, and millions more battle cancer worldwide. As such, primary prevention of cancer is a major interest globally. Aspirin has been studied as a primary prevention method for multiple diseases, mainly cardiovascular disease and various forms of cancer. The role of aspirin as a primary prevention of cancer is still controversial and may be more beneficial in certain cancers over others. With rapidly surfacing large randomized controlled trials (RCTs) studying this subject, we aimed to evaluate the efficacy and safety of aspirin as a primary prophylaxis for cancer. A comprehensive electronic database search was conducted for all RCTs that compared aspirin vs. placebo for the prevention of any type of disease, and where cancer incidence or mortality was reported. The primary outcome was cancer related mortality. Secondary outcomes were cancer incidence, all-cause mortality, major bleeding, any bleeding and gastrointestinal (GI) bleeding. We calculated risk ratios (RRs) and 95% confidence intervals (CIs) using a random-effects model at the longest follow-up period. We included 16 RCTs with 104,018 total patients, mean age of 60.51 years, mean follow-up of 5.48 years, and a male percentage of 38.72%. We found that aspirin was not associated with a significant reduction of cancer-related mortality compared with placebo (RR 0.99; 95% CI: 0.87-1.12; P = 0.85: I2 = 41%). Compared with placebo, aspirin was not associated with significant reduction of all-cause mortality (RR 0.97; 95% CI: 0.92-1.02; P = 0.19; I2 = 13%) or cancer incidence (RR: 0.98; 95% CI: 0.92-1.04; P = 0.43; I2 = 16%). However, aspirin treatment was associated with significantly increased risks of any bleeding (RR 1.63; 95% CI: 1.31-2.03; P < 0.01), major bleeding (RR 1.41; 95% CI: 1.26-1.57; P < 0.01), and GI bleeding (RR 1.85; 95% CI: 1.38-2.48; P < 0.01) compared with placebo. Our study did not find any significant reductions in cancer-related mortality or cancer incidence when compared aspirin use with placebo or no aspirin. Our study also highlights that the use of aspirin for primary prevention of cancer was found to cause higher rates of bleeding (any bleeding, major bleeding, and GI bleeding) compared to placebo or no aspirin at the longest follow-up period with no significant benefit in cancer primary prevention. Journal of Cancer Research and Clinical Oncology published new progress about Digestive system hemorrhage. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Quality Control of 104-01-8.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Cao, Qiang published the artcileCovalent organic framework-supported Zn single atom catalyst for highly efficient N-formylation of amines with CO2 under mild conditions, HPLC of Formula: 5961-59-1, the main research area is covalent organic framework supported zinc catalyst formylation amine CO2.

Transformation of CO2 into value-added chems. with efficient and recyclable catalyst is an effective way to reduce carbon emissions. It is valuable to develop an efficient catalyst that can promote the N-formylation reaction under mild conditions with a high activity and excellent recyclability. Single atom catalysts (SACs) possess ultimate atom utilization efficiency and outstanding catalytic performance. Herein, we synthesize Zn SACs (Zn-TpPa) anchored on a COF (TpPa-1) using a facile solution method. Catalyzed by Zn-TpPa, CO2 and N-methylamine are transformed into N-methylformanilide under mild reaction conditions with a TOF of 17,155 h-1, which is the highest among all reported recyclable Zn-based catalysts. Zn-TpPa can also catalyze N-formylation of many other amines with excellent yields. The higher reactivity was attributable to the well-dispersed Zn active sites on COF and outstanding adsorption of CO2 owing to high surface area of COF. Our research provides a facile method for constructing SACs as well as an effective pathway for CO2 transformation and environmental protection.

Applied Catalysis, B: Environmental published new progress about Covalent organic frameworks. 5961-59-1 belongs to class isoquinoline, name is 4-Methoxy-N-methylaniline, and the molecular formula is C8H11NO, HPLC of Formula: 5961-59-1.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Talzi, V. P. published the artcileA 13C and 1H NMR analysis of perfumes, Quality Control of 1205-17-0, the main research area is perfume carbon 13 NMR characterization.

Composition of a series of formulations used in Russia for production of various perfumes, among them car air fresheners, was studied by 13C and 1H NMR. The main components were identified, approx. compositions of several perfumes were determined, and spectral data are given. These spectral data can be used for prompt anal. for composition of com. odorants with the aim of monitoring their quality and hygienic characteristics.

Russian Journal of Applied Chemistry published new progress about Cosmetic fragrance products. 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