Category: 21834-92-4

Wu, Wen-Biao published the artcileMe2(CH2 = CH)SiCN: a bifunctional ethylene equivalent for Diels-Alder reaction based controllable tandem synthesis, HPLC of Formula: 21834-92-4, the main research area is cyclohexenyl ketone perpn crystal structure mol; cyclohexancarbonitrile derivative perpn crystal structure mol; ylide aldehyde tandem reaction bifunctional silyl reagent.

A bifunctional silyl reagent Me2(CH2=CH)SiCN was developed as a novel ethylene equivalent for the Diels-Alder (DA) reaction. The use of this reagent enabled the controllable synthesis of value-added cyclohexenyl ketones I [R = Ph, 4-MeC6H4, 3-FC6H4, etc.; R1 = Me, Et, Ph, etc.], II [R2 = H, 7-OMe, 6-Br; X = CH2, O] or 2-acyl cyclohexancarbonitrile derivatives III [R3 = Me, cyclopropyl, iPr, Ph; R4 = Ph, 4-MeC6H4, 4-FC6H4, etc.] through a five- or six-step tandem sequence based on a Wittig/cyanosilylation/DA reaction/retro-cyanosilylation/isomerization of P-ylides and enals that involved a temporary silicon-tethered intramol. DA reaction.

Chemical Science published new progress about Crystal structure. 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

Dusart, A. published the artcileOccurrence of (suspected) genotoxic flavoring substances in Belgian alcohol-free beers, Computed Properties of 21834-92-4, the main research area is Belgian alc free beers flavoring substances genotoxicity; Alcohol-free beers; Flavoring substances; GC–MS; Genotoxicity; SAFE.

The regulatory landscape of flavorings is evolving, thereby putting pressure on control laboratories to develop anal. methods for a wide range of compounds in various types of food and drinks. In order to improve the monitoring of flavoring substances, a versatile and accurate anal. method using the solvent-assisted flavor evaporation (SAFE) technique coupled to GC-MS(SIM) was developed and validated. Focus was put on authorized flavoring substances requiring specific attention due to a genotoxic concern based on information from European risks assessment reports. Thirty-seven (suspected) genotoxic flavoring substances were analyzed in a selection of ten alc.-free beers. Five suspected genotoxic compounds (i.e. 1-(2-furyl)-2-propanone, 2-acetylfuran, 2-acetyl-5-methylfuran, 2-acetyl-3,5-dimethylfuran, hex-2-eno-1,4-lactone) as well as two confirmed genotoxic flavoring substances (p-mentha-1,8-dien-7-al, 2,4-pentanedione) were identified and quantified among the selected samples. Low concentrations and natural occurrences of the identified compounds suggested that these were not added as such but rather originated from heat-treatments or from plant-based extracts

Food Chemistry published new progress about Beer. 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

Dymerski, Tomasz published the artcileBotanical and geographical origin characterization of polish honeys by headspace SPME-GC×GC-TOFMS, Quality Control of 21834-92-4, the main research area is VOC geog origin honey microextraction chromatog mass spectrometry Poland.

Volatile organic compounds (VOCs) composition of Polish honeys obtained from various geog. regions was studied. Headspace solid phase microextraction (HS-SPME) using Divinylbenzene/Carboxen/Polydimethylsiloxane-coated fibers was used in combination with comprehensive two-dimensional gas chromatog.-time-of-flight mass spectrometry (GC×GC-TOFMS) because of the complexity of the samples. Acacia, linden, rapeseed, buckwheat and honeydew honeys were studied in this project. A total of 329 compounds were identified during the investigations. Pos. identification of 82 compounds was achieved using anal. standards, while tentative identification of 247 compounds was based on comparison of deconvoluted mass spectra and linear temperature programmed retention indexes (LTPRI) with NIST 2005 library and literature values, resp. Many VOCs identified in Polish honey samples were commonly present in honeys from other geog. regions of Europe (e.g. Italy, Corsica). They included certain acyclic and cyclic alkanes, acyclic and cyclic alkenes, aromatic hydrocarbons, oxygenated aromatic compounds, alcs., aldehydes, ketones, esters, ethers, nitriles, organic sulfides, phenolic compounds and terpenes. GC×GC-TOFMS profiles for the same types of honey samples were remarkably similar. Eight botanic discriminants were selected among all compounds Their identity was confirmed by comparison with authentic standards Furthermore, possible geog. discriminants for Polish honeys were identified, including 19 for acacia, 3 for linden, 3 for rapeseed and buckwheat and 6 for honeydew honeys.

Current Organic Chemistry published new progress about Acacia. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Quality Control of 21834-92-4.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Karabagias, Ioannis K. published the artcileBotanical discrimination of Greek unifloral honeys with physico-chemical and chemometric analyses, SDS of cas: 21834-92-4, the main research area is honey classification botanical origin volatile compound chemometrics; Chemical markers; Chemometrics; Classification; Multi element analysis; Unifloral honeys.

The aim of the present study was to investigate the possibility of characterization and classification of Greek unifloral honeys (pine, thyme, fir and orange blossom) according to botanical origin using volatile compounds, conventional physico-chem. parameters and chemometric analyses (MANOVA and Linear Discriminant Anal.). For this purpose, 119 honey samples were collected during the harvesting period 2011 from 14 different regions in Greece known to produce unifloral honey of good quality. Physico-chem. anal. included the identification and semi quantification of fifty five volatile compounds performed by Headspace Solid Phase Microextraction coupled to gas chromatog./mass spectroscopy and the determination of conventional quality parameters such as pH, free, lactonic, total acidity, elec. conductivity, moisture, ash, lactonic/free acidity ratio and color parameters L*, a*, b*. Results showed that using 40 diverse variables (30 volatile compounds of different classes and 10 physico-chem. parameters) the honey samples were satisfactorily classified according to botanical origin using volatile compounds (84.0% correct prediction), physicochem. parameters (97.5% correct prediction), and the combination of both (95.8% correct prediction) indicating that multi- element anal. comprises a powerful tool for honey discrimination purposes.

Food Chemistry published new progress about Abies. 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

Alves, Vinicius M. published the artcileAlarms about structural alerts, Product Details of C13H16O, the main research area is chem pharmaceutical safety assessment structural alert; quant structure activity relationship model chem pharmaceutical safety; QSAR; green chemistry; read-across; structural alerts; toxicity.

Structural alerts are widely accepted in chem. toxicol. and regulatory decision support as a simple, transparent means to flag potential chem. hazards or group compounds into categories for read-across. However, there is a growing concern that alerts disproportionally flag chems. as toxic, which questions their reliability as toxicity markers. Conversely, rigorously developed, properly validated statistical QSAR models can accurately, reliably predict the toxicity of a chem.; however, their use in regulatory toxicol. has been hampered by a lack of transparency and interpretability. This work demonstrated that contrary to the common perception of QSAR models as black boxes, they can identify statistically significant chem. substructures (QSAR-based alerts) which influence toxicity. The authors show using case studies, that the mere presence of structural alerts in a chem., irresp. of the derivation method (expert- or QSAR-based), should be perceived only as hypotheses of possible toxicol. effect. A new approach is proposed which synergistically integrates structural alerts and rigorously validated QSAR models for a more transparent, accurate safety assessment of new chems.

Green Chemistry published new progress about Drugs. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Product Details of C13H16O.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Lu, Yunhao published the artcileBio-augmented effect of Bacillus amyloliquefaciens and Candida versatilis on microbial community and flavor metabolites during Chinese horse bean-chili-paste fermentation, Product Details of C13H16O, the main research area is Bacillus Candida flavor metabolites horse beans fermentation China; Bio-augmented fermentation; Chinese horse bean-chili-paste; Enzymatic activities; Microbial diversity; Volatile compounds.

Chinese horse bean-chili-paste (CHCP), a fermented condiment in China, is traditionally manufactured through naturally spontaneous semi-solid fermentation procedures without intentionally inoculated microorganisms. The aim of this study was to investigate the effect on microbiota and quality variations during CHCP fermentation by inoculation of selected autochthonous microorganisms Bacillus amyloliquefaciens and Candida versatilis. The results showed that relative abundance of Bacillus in the samples inoculated with B. amyloliquefaciens were increased from about 0.6% to almost 25%, and the batches bio-augmented with C. versatilis exhibited clearly 0.7 Lg copies/g higher biomass than that of the other samples. By bio-augmentation, six enzyme activities, namely acid protease, leucine aminopeptidase, α-amylase, cellulose, β-glucosidase and esterase, were considerably enhanced. As a result, inoculation of these two strains exhibited significant effect on the volatile profiles of CHCP. B. amyloliquefaciens herein was found to contribute mainly to the accumulation of acids, sulfur-containing compounds and pyrazines, whereas C. versatilis was considerably associated with the formation of alcs., esters and phenols. This study proved that combination of B. amyloliquefaciens and C. versatilis could obtain more extensive aroma profiles, especially for the enrichment of miso-like and fruity flavors, which could provide a guideline for the tailored control of CHCP fermentation process.

International Journal of Food Microbiology published new progress about Acidity. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Product Details of C13H16O.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Sioriki, Eleni published the artcileThe effect of cocoa alkalization on the non-volatile and volatile mood-enhancing compounds, Safety of 5-Methyl-2-phenylhex-2-enal, the main research area is cocoa alkalization nonvolatile volatile mood enhancing compound; Alkalization; Cocoa; Mood; Non-volatiles; Phytochemicals; Volatiles.

Alkalization is a process to improve color, dispersibility and flavor of cocoa powder but is likely to have a neg. effect on the phytochems. Hereto, the impact of alkalization degree (none, medium and high) on the potential mood-enhancing compounds corresponding to the four levels of the mood pyramid model (flavanols, methylxanthines, biogenic amines and orosensory properties) was investigated. The phytochem. content, analyzed via UPLC-HRMS, showed reduction of specific potential mood-enhancing compounds upon alkalization, implying a decrease in bitterness and astringency. Moreover, volatile compounds anal. via HS-SPME-GC-MS indicated that alkalization reduced the levels of volatile compounds, responsible for acidity, fruity, floral and cocoa aromas. With respect to the orosensory properties, the cocoa powder palatability was suggested to be increased due to reduced acidity, bitterness, and astringency, while the desired volatile compounds were reduced. However, sensorial anal. is required to link the volatile results with the overall effect on the flavor perception.

Food Chemistry published new progress about Acidity. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Safety of 5-Methyl-2-phenylhex-2-enal.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Zhang, Yu published the artcileCorrelation between the quality and microbial community of natural-type and artificial-type Yongchuan Douchi, Recommanded Product: 5-Methyl-2-phenylhex-2-enal, the main research area is fermentation food Yongchuan Douchi microbial community.

Yongchuan douchi is a traditional fermented food in China. This study investigated the microbial community of two major types (Natural and artificial) of Yongchuan douchi, and their influences on quality. The results found that natural-type douchi had significantly better quality in its physicochem. properties such as higher amino nitrogen, darker color, and higher umami amino acids after post-fermentation (p < 0.05). A total of 58 volatile components were found in natural-type douchi compared to artificial-type with 42 identified. Microbial anal. found that natural-type douchi had the richness and diversity of the bacterial (fungus) community. However, artificial-type douchi was high in Candida genera may associated with its bitter after taste compared to natural-type. Following post-fermentation, natural-type douchi had higher abundance of Bacillus sp., Enterobacter sp., and Pseudomonas sp., while Bacillus sp., Weissella sp., and Aspergillus sp. compared to artificial-type douchi. Correlation anal. showed that physicochem. properties and sensory quality could be correlated pos. or neg. with the microbial composition during the last stage of post-fermentation In conclusion, the zhiqu process significantly affected the final quality of the two types of Yongchuan douchi as evidenced by the microbial composition in the post-fermentation process. LWT--Food Science and Technology published new progress about Acidity. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Recommanded Product: 5-Methyl-2-phenylhex-2-enal.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Rottiers, Hayley published the artcileA multipronged flavor comparison of Ecuadorian CCN51 and Nacional cocoa cultivars, Recommanded Product: 5-Methyl-2-phenylhex-2-enal, the main research area is Theobroma nacional cocoa flavor sensory property odor.

Two cocoa types are predominantly being cultivated in Ecuador, the highly appreciated fine Nacional and the high-yielding and disease-resistant CCN51, classified as bulk. With the introduction of foreign germplasm in Ecuador and the international demand for high-quality Nacional cocoa, the present study aims to characterize and compare the flavor profile of Nacional hybrids (EET103, EET559, EET576 and EET577) and CCN51, and to assess the effect of the genotype. The fermented dried beans were processed into liquor and their sensory properties, volatile composition and odor fingerprint were analyzed by trained panelists, headspace-solid phase microextraction gas chromatog.-mass spectrometry (HS-SPME-GC-MS), and GC electronic nose (e-nose), resp., combined with multivariate statistics. Seventy volatiles were identified and semi-quantified, among them, 16 and 14 volatiles conferring fruity and floral aroma notes, resp. CCN51 was mainly characterized by undesirable odor-active volatiles, whereas the EET cultivars contained the highest concentration of most fruity and floral volatiles, with differences in between EET cultivars. Sensory data highlighted organoleptic differences between the fine and bulk liquors, i.e. the fruity and acid EET flavor strongly differed from the bitter, astringent and off-flavor attributes of CCN51. Principal component anal. (PCA) discriminated firstly between fine and bulk, and secondly between EET identity. Partial least squares anal. identified possible correlations between sensory attributes and volatile compounds Besides, e-nose proved its usefulness for rapid assessment of the liquors’ sensory profile. The results provide a foundation for understanding the genotype’s contribution to and the compositional basis of Ecuadorian fine and bulk cocoa flavor.

European Food Research and Technology published new progress about Acidity. 21834-92-4 belongs to class isoquinoline, name is 5-Methyl-2-phenylhex-2-enal, and the molecular formula is C13H16O, Recommanded Product: 5-Methyl-2-phenylhex-2-enal.

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem

Karabagias, Ioannis K. published the artcileCharacterization and classification of Thymus capitatus (L.) honey according to geographical origin based on volatile compounds, physicochemical parameters and chemometrics, Formula: C13H16O, the main research area is Thymus honey volatile compound.

Greek thyme honeys (Thymus capitatus L.) were characterized and classified according to geog. origin based on the determination of volatile compounds and physicochem. parameters using MANOVA and Linear Discriminant Anal. Forty two thyme honey samples were collected during the harvesting period in 2011 from 5 different regions in Greece known to produce thyme honey of good quality. The anal. of volatile compounds was performed by Headspace Solid Phase Microextraction coupled to Gas chromatog./Mass spectroscopy. Forty seven volatile compounds were identified and semi-quantified. Physicochem. anal. included the determination of pH, free, lactonic and total acidity, elec. conductivity, moisture, ash, lactonic/free acidity ratio and color parameters: L*, a*, b*. Using 9 volatile compounds and 11 physicochem. parameters the honey samples were satisfactorily classified according to geog. origin using volatile compounds (64.3% correct prediction), physicochem. parameters (92.7% correct prediction), and the combination of both (92.9% correct prediction).

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

Referemce:
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem