Tag: M.W=150-200

Verevkin, Sergey P. published the artcileWeaving a Network of Reliable Thermochemistry around Lignin Building Blocks: Methoxy-Phenols and Methoxy-Benzaldehydes, Name: 2,3-Dimethoxybenzaldehyde, the main research area is thermochem lignin methoxyphenol methoxybenzaldehyde sublimation vaporization.

The methoxy, hydroxy, and carbonyl substituted benzenes are the simplest fragments from the lignin separation feedstocks. Extensive exptl. thermochem. studies of these compounds were carried out, including combustion calorimetry, vapor pressure measurements and differential scanning calorimetry. We have collected available primary exptl. results on enthalpies of formation and vapor pressures as well as on phase transitions liquid-gas, liquid-solid, crystal-liquid These data were evaluated using empirical, semiempirical and quantum chem. methods. The consistent sets of evaluated thermodn. data were used to design the method for predicting enthalpies of vaporization and enthalpies of formation of di- and trisubstituted benzenes. It is expected that parameters and pairwise interactions will be transferable to predict the thermochem. properties of poly methoxy-substituted and poly hydroxy-substituted benzenes that appear in reaction products of lignin transformations in the value-adding chems. and materials. Comparison of the Exptl. (ΔfHmo(g)exp) and Theor. (ΔfHmo(g)theor) Standard Molar Gas-Phase Enthalpies of Formation Substituted Benzenes at T = 298.15 K and p° = 0.1 MPa (in kJ·mol-1)compoundΔfHmo(g)expG4G4G3MP2G3MP2M06/QZ4PM06/QZ4PΔfHmo(g)theorExp. ATWBRATWBRATWBRaverage2,3-dimethoxyphenol-393.0 ± 2.1-389.5-390.2-390.2-391.4—390.3 ± 2.42,4-dimethoxyphenol-398.3 ± 2.8-397.2-397.9-397.5-398.6-394.4-396.7-397.1 ± 2.42,5-dimethoxyphenol–397.8-398.5-397.8-398.9-395.3-397.6-396.9 ± 2.42,6-dimethoxyphenol-384.8 ± 1.9-388.9-389.5-388.8-390.0-386.6-388.7-388.9 ± 2.03,4-dimethoxyphenol-380.9 ± 3.3-380.5-381.2-379.9-381.0-379.2-381.1-380.5 ± 2.03,5-dimethoxyphenol-401.2 ± 1.7-402.0-402.7-401.4-402.5-401.7-404.2-402.4 ± 2.42,3-dimethoxybenzaldehyde–323.4-323.9-324.0-325.5-319.2-318.0-322.8 ± 2.82,4-dimethoxybenzaldehyde-346.9 ± 1.8-347.3-347.8-347.4-348.7-350.3-349.9-348.6 ± 2.02,5-dimethoxybenzaldehyde-338.1 ± 2.2-337.5-338.0-337.9-339.2-339.0-338.3-338.3 ± 2.12,6-dimethoxybenzaldehyde–323.1-323.6-322.6-324.1-325.9-324.9-324.0 ± 2.03,4-dimethoxybenzaldehyde-343.1 ± 2.4-341.2-341.7-340.6-342.0-344.0-343.5-342.2 ± 2.23,5-dimethoxybenzaldehyde–349.6-350.1-349.3-350.6-350.8-350.5-350.2 ± 2.01,2-dimethoxybenzene-206.0 ± 3.1-209.4-211.3-209.1-211.4-207.8-210.9-210.0 ± 2.41,3-dimethoxybenzene-223.6 ± 1.9-224.2-226.0-223.8-226.0-222.9-226.4-224.8 ± 2.61,4-dimethoxybenzene-216.2 ± 0.9-216.0-217.8-216.1-218.4-214.8-218.1-216.9 ± 2.42-methoxyphenol-247.3 ± 1.8-247.3-249.4-247.9-250.1-244.0-248.2-247.8 ± 3.63-methoxyphenol-241.2 ± 1.2-244.8-247.0-244.5-246.7-243.3-247.5-245.6 ± 2.84-methoxyphenol-234.3 ± 1.3-236.2-238.4-236.3-238.6-234.4-238.3-237.0 ± 2.82-methoxy-benzaldehyde-190.1 ± 2.7-185.7-184.3-185.9-184.8-185.2 ± 2.43-methoxy-ben. The uncertainties are given as the twice standard deviation. Calculated by the G4, G3MP2, or M06/QZ4P method according to the standard atomization procedure and corrected with empirical equations specific for each method (see text). Calculated by the G4, G3MP2 or M06/QZ4P method with help of reactions or using exptl. ΔfHmo(g)-values for the reaction participants (see Table S7). Numerical data for reactions and are given in Tables S11 and S12 in ESI. Numerical data for dimethoxy-benzenes (R-21), methoxy-phenols (R-22), and methoxy-benzaldehydes (R-23) are also given in Tables S13-S15 in ESI.

Industrial & Engineering Chemistry Research published new progress about Combustion enthalpy. 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

Nijem, Sally published the artcileFlex-activated CO mechanochemical production for mechanical damage detection, SDS of cas: 104-01-8, the main research area is PMMA mechanophore network preparation carbon monoxide mech damage detection.

Mechanophores have become a very useful tool to study mech. stress at the mol. level, as well as a method for detection of mech. damage. However, optical signals from such mechanophores are limited by light-scattering or simply by the polymer color. Gas-releasing mechanophores are an interesting alternative, which provide a chem. signal which can easily leave a polymer matrix and be detected, although the precise location for the damage is lost. Here the development of a flex-activated CO-releasing mechanophore is presented, and the mechanophore is included in a PMMA network. Upon testing, this mechanophore releases CO in large amounts, which could be detected even with a com. household CO-detector.

Polymer Chemistry published new progress about Crosslinking agents. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, SDS of cas: 104-01-8.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Mohamadpour, Farzaneh published the artcilePhotoexcited Na2 eosin Y as direct hydrogen atom transfer (HAT) photocatalyst promoted photochemical metal-free synthesis of tetrahydrobenzo[b]pyran scaffolds via visible light-mediated under air atmosphere, Related Products of isoquinoline, the main research area is eosin tetrahydrobenzopyran scaffold hydrogen atom transfer photochem method.

Eosin Y is a metal-free organic dye with easy availability that has gained a wide application in recent years, having economic and ecol. superiority for substituting transition-metal-based photocatalysts. A green three-component tandem strategy for synthesizing tetrahydrobenzo[b]pyran scaffolds through Knoevenagel-Michael cyclocondensation is reported using Na2 eosin Y-derived photoexcited states functions as a direct hydrogen atom transfer (HAT) catalyst via visible light-mediated in aqueous ethanol at ambient temperature under air atm. This study paves the new role for further use of a metal-free organic dye with com. availability and inexpensiveness, Na2 eosin Y in photochem. synthesis with use of the lowest amount of catalyst, energy-effectiveness, excellent yields, operational simplicity, time-saving aspects of the reaction and high atom economy, thus meeting some features of sustainable and green chem.

Journal of the Taiwan Institute of Chemical Engineers published new progress about Absorption spectra. 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

Verrier, Charlie published the artcileDirect Stereoselective Installation of Alkyl Fragments at the β-Carbon of Enals via Excited Iminium Ion Catalysis, Related Products of isoquinoline, the main research area is enal dihydropyridine alkyl amine chiral light conjugate addition catalyst; aldehyde alkyl stereoselective preparation.

The direct introduction of sp3 carbon fragments at the β position of α,β-unsaturated aldehydes is greatly complicated by competing 1,2-addition manifolds. Previous catalytic enantioselective conjugate addition methods, based on the use of organometallic reagents or ground-state iminium ion activation, could not provide general and efficient solutions We report herein that, by turning them into strong oxidants, visible light excitation of chiral iminium ions triggers a stereocontrolled radical pathway that exclusively affords highly enantioenriched β-substituted aldehydes bearing a variety of alkyl fragments.

ACS Catalysis published new progress about Absorption spectra. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, Related Products of isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Bihdan, Oleksii published the artcileStudying of physico-chemical properties of 5-(2-,3-fluorophenyl)-4-((aryl-, heteryl)-yliden)-amino-1,2,4-triazole-3-thiols and any of their retrieval products, COA of Formula: C9H10O3, the main research area is fluorophenyl aryl methylamino triazole thiol preparation physicochem property; aryl fluorophenyl methyleneamino triazole thiol reduction physicochem property.

The purpose of the work was to study the physico-chem. properties of new 5-(2-fluorophenyl)-4-[(aryl)methyleneamino]-1,2,4-triazole-3-thiols I [R1 = 2-F, 3-F; R2 = 4-FC6H4, 3-pyridyl, 2,4-di-MeC6H3, etc.] and some products of their reduction, 5-(3-fluorophenyl)-4-[(aryl)methylamino]-1,2,4-triazole-3-thiols II [R1 = 3-F]. As the starting compounds, 5-(2-fluorophenyl)-4-amino-1,2,4-triazole-3-thiol and 5-(3-fluorophenyl)-4-amino-1,2,4-triazole-3-thiol were used.

Research Journal of Pharmaceutical, Biological and Chemical Sciences published new progress about Absorption spectra. 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

Wang, Lin published the artcileVisible-Light-Promoted Biomimetic Reductive Functionalization of Quaternary Benzophenanthridine Alkaloids, Safety of 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, the main research area is benzophenanthridine alkaloid alkyl dihydropyridine reductive alkylation light.

Reduction of an iminium C=N double bond is the most important phase I metabolism process associated with the cytotoxic property of quaternary benzophenanthridine alkaloids (QBAs). Inspired by the light-mediated reduction of QBAs with NAD, a visible-light-promoted reductive functionalization reaction of QBAs is reported in this study. C4-Alkyl-1,4-dihydropyridines (DHPs) enable the direct reductive alkylation of QBA independently, serving as both single-electron-transfer reductant reagents under irradiation with 455 nm blue light in the absence of photocatalysts and addnl. additives. Our protocol can be further applied to the semisynthesis of natural 6-substituted dihydrobenzophenanthridine derivatives such as O-acetyl maclekarpine E.

Journal of Natural Products published new progress about Absorption spectra. 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

Patchipala, Suri Babu published the artcileSynthesis, in-vivo anti-diabetic & anticancer activities and molecular modelling studies of tetrahydrobenzo[d]thiazole tethered nicotinohydrazide derivatives, COA of Formula: C9H10O3, the main research area is tetrahydrobenzothiazole nicotinohydrazide preparation docking antidiabetic anticancer activity.

A series of thirty new thiazole-pyridine derivatives I (R = Ph, pyridin-3-yl, 2,5-difluoro Ph, etc.; R1 = H, cyclopropylmethyl) was synthesized by reaction of 4,4,7,7-tetra-methyl-4,5,6,7-tetrahydrobenzo[d]thiazol-2-amine with 6-chloronicotinate followed by condensing with benzaldehydes RCHO and screened for their anti-diabetic activity by in vivo housing Swiss albino mice. All synthesized compounds resulted in reducing the glucose level when compared with reference standard drug glibenclamide. In specific, Et 6-((4,4,7,7-tetramethyl-4,5,6,7-tetrahydrobenzo[d]thiazol-2-yl)amino)nicotinate exhibited significant activity in terms of fasting blood glucose level reduction In addition, the in-silico binding studies of the potential compounds I (R = 4-fluoro-3-methoxyphenyl, R1 = H; R = 5-fluoro-2-nitrophenyl, R1 = H) with human PPAR-γ protein complexed with Retinoid X Receptor (RXR) alpha Nuclear Receptor showed good interactions when compared to the standard drug Rosiglitazone. The newly synthesized drugs may be potential anti-diabetic drugs with possible specific actions.

Arabian Journal of Chemistry published new progress about Antidiabetic agents. 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

Anderson, Niall A. published the artcileDiscovery of an Orally Bioavailable Pan αv Integrin Inhibitor for Idiopathic Pulmonary Fibrosis, Application of 4-Methoxyphenylacetic acid, the main research area is phenylbutyrate derivative preparation oral integrin inhibitor idiopathic pulmonary fibrosis.

The heterodimeric transmembrane αv integrin receptors have recently emerged as potential targets for the treatment of idiopathic pulmonary fibrosis. Herein, we describe how subtle modifications of the central aromatic ring of a series of phenylbutyrate-based antagonists of the vitronectin receptors αvβ3 and αvβ5 significantly change the biol. activities against αvβ6 and αvβ8. This resulted in the discovery of a pan αv antagonist (compound 39, 4-40 nM for the integrin receptors named above) possessing excellent oral pharmacokinetic properties in rats (with a clearance of 7.6 mL/(min kg) and a bioavailability of 97%).

Journal of Medicinal Chemistry published new progress about Antifibrotic agents. 104-01-8 belongs to class isoquinoline, name is 4-Methoxyphenylacetic acid, and the molecular formula is C9H10O3, Application of 4-Methoxyphenylacetic acid.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Febrianto, N. A. published the artcileCocoa-like flavor compound development of rambutan seed fat as the effect of fermentation and roasting, Name: 5-Methyl-2-phenylhex-2-enal, the main research area is rambutan seed fat fermentation roasting pyrazine ketone alc ester.

Rambutan seed waste has become a noteworthy problem in rambutan canning industry that need to be solved. Previous finding showed that rambutan seed could be utilized by extracting the fat that could be utilized as confectionery fat with improved characteristic by fermentation and roasting treatment. The study to evaluate the cocoa-like flavor compounds development as the effect of these process was carried out. The rambutan seed was fermented for 3, 6, and 9 days followed/unfollowed by roasting process at 150°C for 30 min. The browning index of the powder, the Maillard Reaction Products (MRPs) and the volatile flavor compounds of the rambutan seed fat were analyzed. The study found that the fermentation treatment followed by roasting treatment significantly increase the browning index and melanoidin content in powder and fat, resp. Six and 9 days fermentation followed by roasting possessed highest value of browning index (1.4875 and 1.5485 AU, resp.) and melanoidin content (0.318 and 0.295 AU, resp.). The result also showed that fermentation of rambutan seed followed by roasting process could successfully developed desired pyrazine compounds, in which the contribution of the pyrazine content could be as much as 42.69% of total flavor compound of rambutan seed fat.

International Food Research Journal published new progress about Bacillus megaterium. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Name: 5-Methyl-2-phenylhex-2-enal.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Joshi, Robin published the artcileEffect of decaffeination conditions on quality parameters of Kangra orthodox black tea, HPLC of Formula: 21834-92-4, the main research area is temperature pressure black tea decaffeination volatile supercritical carbon dioxide.

Effect of extraction temperature and pressure on the removal of caffeine from Kangra orthodox black tea using supercritical carbon dioxide was investigated. Maximum caffeine as well as volatile flavor components was extracted at 35 °C/170 bar using 60 g/min flow rate for 90 min extraction in dynamic mode. Satisfactory decaffeination and quality retention were achieved at extraction at 60 °C/90 bar. The quality of extracts reduced at higher extraction temperature and pressure combinations. Maximum amounts of theaflavins (88.88%), thearubigins (81.18%) and catechins (73.53%) were retained at these extraction conditions. Volatile components in original (caffeinated) and decaffeinated black teas were isolated by simultaneous distillation extraction (SDE), and analyzed by gas chromatog. (GC) and gas chromatog.-mass spectrometry (GC-MS). 2-Hexenal, 3-hexenol, phenylacetaldehyde, cis-linalool oxide, linalool, trans-geraniol, nerolidol, Me salicylate, α- and β-ionones decreased in decaffeinated black teas compared to untreated control. β-ionone (1.77%), trans-linalool oxide (5.36%), linalool (7.84%), trans-geraniol (4.32%) and Me salicylate (1.90%) were retained in satisfactory amount in decaffeination at 60 °C/90 bar. Application of aroma extract dilution anal. revealed 11 odor active compounds with flavor dilution (FD) factor ranging from 8 to 512 and odor quality investigated by GC-FID, GC-MS. Some unknown compounds quant. reduced or disappeared during decaffeination process. Although there was considerable loss of theaflavins and thearubigins as well as volatile flavor components, SFE extraction at 60 °C/90 bar for 90 min appears as the method suitable for selective removal of caffeine from the Kangra orthodox black tea.

Food Research International published new progress about Black tea beverages. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, HPLC of Formula: 21834-92-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem