Tag: M.W=150-200

Sioriki, Eleni published the artcileImpact of alkalization conditions on the phytochemical content of cocoa powder and the aroma of cocoa drinks, COA of Formula: C13H16O, the main research area is cocoa powder aroma drink alkalization phytochem content.

Alkalization is an important process in cocoa powder production that affects color and flavor. In this study, the impact of alkalization temperature (60, 70, 80, 90, 100°C), NaOH concentration (0.59, 1.17, 2.34, 3.59% weight/weight of cocoa powder) and alkalization time (1 and 10 min) on the physicochem. properties (pH, color) and phytochem. profile (theobromine, caffeine, epicatechin, catechin) of cocoa powder were investigated, while the aroma was studied on the corresponding cocoa drinks. High-performance liquid chromatog. coupled to an ultra-violet detector (HPLC-UV) was used for screening the non-volatiles and headspace solid – phase microextraction – gas chromatog. – mass spectrometry (HS-SPME-GC-MS) for the aromatic compounds Major changes of the cocoa properties occurred during the first minute of alkalization. Increase of temperature and alkali concentration generally reduced the levels of epicatechin and the lightness (L*), while the pH of the cocoa powder was affected by changing the alkali concentration On the other hand, the reddish (a*) and yellowish (b*) color component values and theobromine levels were not significantly affected by varying temperature and alkali concentration A higher temperature did not affect the concentration of the volatile compounds, while a decrease in certain chem. classes was observed by increasing the alkali concentration

LWT–Food Science and Technology published new progress about Aldehydes Role: ANT (Analyte), BSU (Biological Study, Unclassified), ANST (Analytical Study), BIOL (Biological Study). 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, COA of Formula: C13H16O.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Misnawi published the artcileUse of Gas Chromatography-Olfactometry in combination with Solid Phase Micro Extraction for cocoa liquor aroma analysis, Category: isoquinoline, the main research area is gas chromatog olfactometry solid phase microextraction cocoa liquor aroma.

Aroma of cocoa liquor extracted by using Solid Phase Micro Extraction with polydimethylsyloxane-divinylbenzene polymer was analyzed in Gas Chromatog.-Olfactometry. Headspace extraction of cocoa odor-active compounds for 30 min at temperature of 60°C followed by GC separation elaborated with column oven initial temperature at 60°C and ramped at 5°C/min to reach 220°C identified most of the odor-active compounds including wide range of alcs., carboxylic acids, aldehydes, ketons, esters, pyrazines, and amines. Cocoa specific aroma attributed in terms of sweet, nutty, caramel and chocolate-like notes were associated with trimethylpyrazine, tetramethylpyrazine, 2,3-butanediol, dodecanoic acid, phenylethyl alc., ethanone, benzeneacetaldehyde and 1,4-bis(morpholinoacetyl)piperazine. Meanwhile defective cocoa aroma such as smoky and rancid were generated by benzeneacetaldehyde, alphaethylidene; trimethylpyrazine, and trans-2,3-dimethyloxirane.

International Food Research Journal published new progress about Aldehydes Role: ANT (Analyte), BSU (Biological Study, Unclassified), ANST (Analytical Study), BIOL (Biological Study). 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Category: isoquinoline.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Lee, Changgook published the artcileDevelopment of a simultaneous multiple solid-phase microextraction-single shot-gas chromatography/mass spectrometry method and application to aroma profile analysis of commercial coffee, COA of Formula: C13H16O, the main research area is coffee aroma determination microextraction gas chromatog mass spectrometry.

A simultaneous multiple solid-phase microextraction-single shot-gas chromatog. mass spectrometry (smSPME-ss-GC/MS) method has been developed for headspace anal. Up to four fibers (50/30 μm DVB/CAR/PDMS) were used simultaneously for the extraction of aroma components from the headspace of a single sample chamber in order to increase sensitivity of aroma extraction To avoid peak broadening and to maximize resolution, a simple cryofocusing technique was adopted during sequential thermal desorption of multiple SPME fibers prior to a single shot chromatog. run. The method was developed and validated on a model flavor mixture, containing 81 known pure components. With the conditions of 10 min of incubation and 30 min of extraction at 50°, single, dual, triple and quadruple SPME extractions were compared. The increase in total peak area with increase in the number of fibers showed good linearity (R2 = 0.9917) and the mean precision was 12.0% (RSD) for the total peak sum, with quadruple simultaneous SPME extraction Using a real sample such as com. coffee granules, aroma profile anal. was conducted using single, dual, triple and quadruple SPME fibers. The increase in total peak intensity again showed good linearity with increase in the number of SPME fibers used (R2 = 0.9992) and the precision of quadruple SPME extraction was 9.9% (RSD) for the total peak sum.

Journal of Chromatography A published new progress about Aldehydes Role: ANT (Analyte), BSU (Biological Study, Unclassified), ANST (Analytical Study), BIOL (Biological Study). 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, COA of Formula: C13H16O.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Titova, Yu. A. published the artcile4-(Het)aryl-4,7-dihydroazolopyrimidines and Their Tuberculostatic Activity, Name: 2,3-Dimethoxybenzaldehyde, the main research area is dihydrotriazolopyrimidine preparation antituberculosis SAR; dihydropyrazolopyridine preparation antituberculosis SAR.

Structural analogs of a promising antituberculous agent, dihydro[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxylates I [R = Me, OEt, NH2, i-BuO, OBn; R1 = 2-thienyl, 3-thienyl, 2-O2NC6H4, 4-CO2HC6H4, 2,3-di-MeOC6H4] and Et 6-methyl-4-(thiophen-2-yl)-4,7-dihydro-2H-pyrazolo[3,4-b]pyridine-5-carboxylate were synthesized by three-component condensations of various aromatic or hetarom. aldehydes with several β-dicarbonyl compounds (CH acids) and 1H-1,2,4-triazol-5-amine or 1H-pyrazol-5-amine. The obtained compounds were evaluated for tuberculostatic activity and structure-activity relations were analyzed. Among the synthesized compounds, compound I [R = OEt; R1 = 2-O2NC6H4] proved to be most promising compound

Russian Journal of Organic Chemistry published new progress about Aryl aldehydes 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

Tomar, Radha published the artcileExpanding the Utility of Inexpensive Pyridine-N-oxide Directing Group for the Site-selective sp2/sp3γ-C-H and sp2δ-C-H Functionalization of Carboxamides, Quality Control of 104-01-8, the main research area is pyridine oxide based biarylacetamide preparation regioselective; heteroaryl based biaryl carboxamide preparation regioselective; tricyclic quinolone preparation regioselective; arylheteroarylmethane preparation regioselective.

In this paper, the scope of pyridine-N-oxide DG was examined for accomplishing the site-selective (mono) γ-C(sp2)-H arylation in substrates containing competitive C(sp3)-H and C(sp2)-H bonds. The investigation had enabled to assemble a library of pyridine-N-oxide-based biarylacetamides, heteroaryl-based biaryl carboxamides, tricyclic quinolones, arylheteroarylmethanes, biaryl-based aliphatic carboxamides and mono (ortho) arylated phenylglycine derivatives In general, biaryl derivatives and in particular, arylacetamide, arylacetic acid derivatives and pyridine-N-oxide (2-aminopyridyl) motifs were medicinally relevant classes of compounds This work enabled the assembling of a library of the above-mentioned types of compounds through the pyridine-N-oxide directing group-aided site-selective sp2/sp3γ-C-H and sp2δ-C-H functionalization of carboxamides.

Asian Journal of Organic Chemistry published new progress about Arylation. 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

Wang, Dongdong published the artcileComparative studies on polysaccharides, triterpenoids, and essential oil from fermented mycelia and cultivated sclerotium of a medicinal and edible mushroom, Poria cocos, SDS of cas: 21834-92-4, the main research area is fermented mycelia cultivated sclerotium triterpenoid polysaccharide essential oil Poria; HS-GC/MS; Poria cocos; content determination; exopolysaccharides; fermented mycelia; secondary metabolites; triterpenoids; water-soluble polysaccharides.

Poria cocos, an important medicinal and edible fungus, is well known in East Asia. The main active components are water-soluble polysaccharides (WPS) and triterpenoids. Due to the growing market demand, long cultivation period, and consumption of pine trunk during cultivation, alternative methods for producing P. cocos or its active components should be investigated. In this study, WPS, triterpenoids, monosaccharide composition, and essential oil in fermented mycelia and cultivated sclerotium were analyzed using UV spectrophotometry, HPLC, pre-column derivatization, and HS-GC/MS, resp. Our results showed that the WPS and triterpenoids in mycelia are several times higher than those in sclerotium. Among the 62 compounds identified by HS-GC/MS anal. from the essential oil obtained from the fermentation media and a fresh external layer, the two main fragrances in common were linalool and Me phenylacetate. Our results suggested that it is applicable to produce polysaccharides and triterpenoids by the fermentation of P. cocos, and a strategy to improve triterpenoid production in the fermentation process was proposed.

Molecules published new progress about Polysaccharides Role: ANT (Analyte), BSU (Biological Study, Unclassified), ANST (Analytical Study), BIOL (Biological Study). 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, SDS of cas: 21834-92-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Yuan, Kedong published the artcileArylation of gem-difluoroalkenes using a Pd/Cu Co-catalytic system that avoids β-fluoride elimination, Application In Synthesis of 1205-17-0, the main research area is difluorobenzyl methylalkene preparation; difluoroalkene arylsulfonyl chloride palladium copper catalyst diastereoselective arylation.

PdII/CuI co-catalyze an arylation reaction of gem-difluoroalkenes using arylsulfonyl chlorides to deliver α,α-difluorobenzyl products. The reaction proceeded through a β,β-difluoroalkyl-Pd intermediate that typically underwent unimol. β-F elimination to deliver monofluorinated alkene products in a net C-F functionalization reaction. However to avoid β-F elimination, the β,β-difluoroalkyl-Pd intermediate were offered, an alternate low-energy route involving β-H elimination to ultimately deliver difluorinated products in a net arylation/isomerization sequence. Overall, this reaction enabled exploration of new reactivities of unstable fluorinated alkyl-metal species, while also providing new opportunities for transforming readily available fluorinated alkenes into more elaborate substructures.

Chemical Science published new progress about Arylation catalysts, stereoselective. 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

Geng, Huihui published the artcilePractical synthesis of C1 deuterated aldehydes enabled by NHC catalysis, Computed Properties of 21834-92-4, the main research area is deuterated aldehyde preparation; aldehyde reversible hydrogen deuterium exchange NHC catalyst.

N-heterocyclic carbenes promoted a reversible hydrogen-deuterium exchange reaction with simple aldehydes, which led to a practical approach to synthetically valuable C1 deuterated aldehydes RC(O)D [R = Ph, Bn, CH=CHPh, etc.]. The reactivity of the well-established N-heterocyclic carbene-catalyzed formation of Breslow intermediates from aldehydes was reengineered to overcome the overwhelmingly kinetically favorable benzoin condensation reaction and achieve the critical reversibility to drive the formation of desired deuterated products when an excess of D2O was employed. Notably, this operationally simple and cost-effective protocol served as a general and truly practical approach to all types of 1-D-aldehydes including aryl, alkyl and alkenyl aldehydes and enabled chemoselective late-stage deuterium incorporation into complex, native therapeutic agents and natural products with uniformly high levels (>95%) of deuterium incorporation for a total of 104 tested substrates.

Nature Catalysis published new progress about Deuteration. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Computed Properties of 21834-92-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Min, Xiao-Long published the artcileAxial-to-Central Chirality Transfer for Construction of Quaternary Stereocenters via Dearomatization of BINOLs, Related Products of isoquinoline, the main research area is spiro benzochromene naphthalenone asym synthesis; binaphthol dearomatization axial chirality transfer propargyl carbonate enantioselective spirocyclization.

Herein, an axial-to-central chirality transfer strategy for the synthesis of chiral quaternary stereocenters via dearomatization of (S)-BINOLs is disclosed. The reaction of (S)-BINOL with a wide range of propargyl carbonates I (R = Me, cyclopropyl, Ph, 4-ClC6H4, 1-naphthyl, 2-benzothienyl, etc.) proceeded smoothly to afford chiral spiro compounds II in high yields with excellent enantioselectivities. In addition, the strategy was extended to kinetic resolution of rac-BINOLs albeit with moderate s value.

Organic Letters published new progress about Dearomatization. 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

Min, Xiao-Long published the artcileAxial-to-Central Chirality Transfer for Construction of Quaternary Stereocenters via Dearomatization of BINOLs, COA of Formula: C11H12O3, the main research area is spiro benzochromene naphthalenone asym synthesis; binaphthol dearomatization axial chirality transfer propargyl carbonate enantioselective spirocyclization.

Herein, an axial-to-central chirality transfer strategy for the synthesis of chiral quaternary stereocenters via dearomatization of (S)-BINOLs is disclosed. The reaction of (S)-BINOL with a wide range of propargyl carbonates I (R = Me, cyclopropyl, Ph, 4-ClC6H4, 1-naphthyl, 2-benzothienyl, etc.) proceeded smoothly to afford chiral spiro compounds II in high yields with excellent enantioselectivities. In addition, the strategy was extended to kinetic resolution of rac-BINOLs albeit with moderate s value.

Organic Letters published new progress about Dearomatization. 1205-17-0 belongs to class isoquinoline, name is 2-Methyl-3-(3,4-methylenedioxyphenyl)propionaldehyde, and the molecular formula is C11H12O3, COA of Formula: C11H12O3.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem