Month: November 2022

On June 30, 2020, Li, Qin; Li, Yongdi; Luo, Yu; Xiao, Lizheng; Wang, Kunbo; Huang, Jianan; Liu, Zhonghua published an article.Recommanded Product: 91-16-7 The title of the article was Characterization of the key aroma compounds and microorganisms during the manufacturing process of Fu brick tea. And the article contained the following:

Aroma is one of the most important criteria of tea quality, but the dynamic changes of aroma profile during the manufacturing process, and the chem. basis of characteristic aroma in Fu brick tea remain largely unknown. In this study, a total of 72 volatiles were identified and quantified, only the esters content increased sharply during the process. Sensory quant. description anal. revealed that the ‘green’ attribute was dominated in the early processing stage, and the ‘fungal flower’, ‘flower’, ‘mint’ and ‘woody’ attributes became the major contributors to the aroma character in the later processing stages. Indicated by partial least-squares anal., the linalool, acetophenone, and Me salicylate were identified as key volatiles contributors to the ‘fungal flower’, ‘flower’, and ‘mint’ attributes, the cedrol contributed to ‘woody’ attribute, and twelve alcs. and aldehydes were related to ‘green’ attribute. Besides, bidirectional orthogonal partial least squares anal. revealed that six fungal genera Aspergillus, Candida, Debaryomyces, Penicillium, Unclassified_k_Fungi, Unclassified_o_Saccharomycetales were identified as core functional microorganisms link to the metabolism of volatiles. Taken together, these findings provide new insights into Fu brick tea aroma profile variation and increase our understanding of the formation mechanism of the characteristic aroma during the manufacturing process. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Recommanded Product: 91-16-7

The Article related to fu brick tea linalool aspergillus food fermentation manufacturing processing, Food and Feed Chemistry: Beverages and other aspects.Recommanded Product: 91-16-7

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On May 30, 2022, Wang, Jiatong; Shi, Jiang; Zhu, Yin; Ma, Wanjun; Yan, Han; Shao, Chenyang; Wang, Mengqi; Zhang, Yue; Peng, Qunhua; Chen, Yuqiong; Lin, Zhi published an article.Synthetic Route of 91-16-7 The title of the article was Insights into crucial odourants dominating the characteristic flavour of citrus-white teas prepared from citrus reticulata Blanco ‘Chachiensis’ and Camellia sinensis ‘Fudingdabai’. And the article contained the following:

Citrus-white teas (CWs), which possess a balanced flavor of tea and citrus, are becoming more popular worldwide; however, their characteristic flavor and odourants received limited research. Volatile components of two types of CWs prepared from Citrus reticulata Blanco’Chachiensis’ and Camellia sinensis ‘Fudingdabai’ were comprehensively investigated using a combination of stir bar sorptive extraction and gas chromatog.-mass spectrometry (GC-MS). Ninety-nine crucial odourants in the CWs were quantified by applying GC-olfactometry/MS, significant differences were compared, and their odor activity values (OAVs) were calculated Twenty-two odourants (in total 2628.09 and 1131.18 mg/kg resp.) were further confirmed as traditional CW (CW-A) and innovated CW (CW-B) characteristic flavor crucial contributors which all possessed > 1 OAVs, particularly limonene (72919 in CW-A) and trans-β-ionone (138953 in CW-B). The unravelling of CWs aroma composition will greatly expanding our understanding of tea aroma chem. and the potential aroma interactions will offer insights into tea blending technologies. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Synthetic Route of 91-16-7

The Article related to citrus camellia white tea odorant flavor, aroma quantification, characterized odourants, citrus-white tea, odour activity value, sbse-gc-o/ms, Food and Feed Chemistry: Beverages and other aspects.Synthetic Route of 91-16-7

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On June 1, 2021, Ma, Wanjun; Zhu, Yin; Shi, Jiang; Wang, Jiatong; Wang, Mengqi; Shao, Chenyang; Yan, Han; Lin, Zhi; Lv, Haipeng published an article.Category: ethers-buliding-blocks The title of the article was Insight into the volatile profiles of four types of dark teas obtained from the same dark raw tea material. And the article contained the following:

Various dark teas are quite different in their volatile profiles, mainly due to the huge differences in the phytochem. profiles of dark raw tea and the diverse post-fermentation processing technologies. In this study, gas chromatog.-mass spectrometry (GC-MS), qual. GC-olfactometry (GC-O), and enantioselective GC-MS coupled with multivariate anal. were applied to characterize the volatile profiles of various dark teas obtained from the same dark raw tea material. A total of 159 volatile compounds were identified by stir bar sorptive extraction (SBSE) combined with GC-MS, and 49 odor-active compounds were identified. Moreover, microbial fermentation could greatly influence the distribution of volatile enantiomers in tea, and six pairs of enantiomers showed great diversity of enantiomeric ratios among various dark teas. These results suggest that post-fermentation processing technologies significantly affect the volatile profiles of various dark teas and provide a theor. basis for the processing and quality control of dark tea products. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Category: ethers-buliding-blocks

The Article related to volatile raw tea material microbial fermentation, camellia sinensis var. assamica, microbial fermentation, multivariate analysis, odorants, stir bar sorptive extraction, Food and Feed Chemistry: Beverages and other aspects.Category: ethers-buliding-blocks

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On May 10, 2017, Chen, Anjun; Sun, Fei; Yang, Wenlong; Xu, Ge; Zou, Chen published a patent.Recommanded Product: 1162054-86-5 The title of the patent was Method for preparing amino ether compound. And the patent contained the following:

The invention belongs to the tech. field of organic synthesis, and relates to a method for preparing amino ether compound The method comprises the steps of: protecting amino in amino alc. as raw material to obtain Schiff base, then etherifying hydroxy in Schiff base, and performing deprotection to the amino group to obtain corresponding amino ether. The method has high regioselectivity, more than 99.9% of the substrate is etherified, conversion ratio of every reaction is higher than 99.8%, and total yield is greater than 95. When amino alc. is chiral, amino ether with retention of configuration can be obtained. The method has the advantages of conventional operation, low process cost, few three wastes, low energy consumption, and being environment-friendly and easy for industrial large-scale production The experimental process involved the reaction of (S)-1-Methoxypropan-2-amine hydrochloride(cas: 1162054-86-5).Recommanded Product: 1162054-86-5

The Article related to amino ether preparation etherification, Aliphatic Compounds: Ethers and Sulfides and other aspects.Recommanded Product: 1162054-86-5

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On June 22, 2017, Weiss, Matthias; Gagnepain, Julien Daniel Henri; Hoffman, Thomas James; Sulzer-Mosse, Sarah; Lamberth, Clemens published a patent.Name: 4-Bromo-5-methoxy-2-methylaniline The title of the patent was Microbiocidal phenylamidine derivatives for combating, preventing or controlling phytopathogen infestation of plants. And the patent contained the following:

Compounds of the formula (I) wherein R1 and R2 are each independently selected from C1-C4-alkyl and C3-C8-cycloalkyl; or together with nitrogen atom to which they are attached form a three to six-membered saturated cyclic group which may optionally contain one oxygen or one sulfur atom; R3 is hydrogen, halogen or C1-C4-alkyl; R4 is C1-C4-alkyl or C1-C4-haloalkyl; R5 and R6 are each independently selected from C1-C6-alkyl, C1-C6-haloalkyl, C3-C8-cycloalkyl, etc.; R8 is selected from hydrogen, C1-C4-alkyl, C1-C4-alkoxy and C3-C8-cycloalkyl; and X is NR8, O or S; or a salt or an N-oxide thereof. Furthermore, the present invention relates to agrochem. compositions which comprise compounds of formula I, to preparation of these compositions, and to the use of the compounds or compositions in agriculture or horticulture for combating, preventing or controlling infestation of plants, harvested food crops, seeds or non-living materials by phytopathogenic microorganisms, in particular fungi. The experimental process involved the reaction of 4-Bromo-5-methoxy-2-methylaniline(cas: 152626-77-2).Name: 4-Bromo-5-methoxy-2-methylaniline

The Article related to fungicide phenylamidine derivative preparation phytopathogenic fungi crop, Agrochemical Bioregulators: Invertebrate and other aspects.Name: 4-Bromo-5-methoxy-2-methylaniline

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On September 7, 2012, Sakai, Norio; Miyazaki, Takahiro; Sakamoto, Tomohiro; Yatsuda, Takuma; Moriya, Toshimitsu; Ikeda, Reiko; Konakahara, Takeo published an article.SDS of cas: 53136-21-3 The title of the article was Single-step thioetherification by indium-catalyzed reductive coupling of carboxylic acids with thiols. And the article contained the following:

Direct thioetherification from a variety of aromatic carboxylic acids and thiols using a reducing system combined with InBr3 and 1,1,3,3-teramethyldisiloxane (TMDS) in a one-pot procedure is demonstrated. It was also found that a system combined with InI3 and TMDS underwent thioetherification of aliphatic carboxylic acids with thiols. The experimental process involved the reaction of Benzyl(4-bromophenyl)sulfane(cas: 53136-21-3).SDS of cas: 53136-21-3

The Article related to carboxylic acid thioetherification reductive coupling thiol indium catalyst, Aliphatic Compounds: Alcohols and Thiols and other aspects.SDS of cas: 53136-21-3

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Mekapothula, Subbareddy; Addicoat, Matthew A.; Boocock, David J.; Wallis, John D.; Cragg, Peter J.; Cave, Gareth W. V. published an article in 2020, the title of the article was Silica bound co-pillar[4+1]arene as a novel supramolecular stationary phase.Synthetic Route of 150-78-7 And the article contains the following content:

A novel co-pillar[4+1]arene incorporating 2 bromo-octyl substituents was synthesized for the 1st time, using microwave irradiation in high yield (88%) in under 4 min, and bound to the surface of chromatog. SiO2 particles. The resulting new stationary phase was successfully used to sep. xylene isomers via liquid chromatog. techniques. The experimental process involved the reaction of 1,4-Dimethoxybenzene(cas: 150-78-7).Synthetic Route of 150-78-7

The Article related to silica pillar arene supramol liquid chromatog stationary phase irradiation, Organic Analytical Chemistry: Separations and other aspects.Synthetic Route of 150-78-7

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On July 31, 2020, Van Gelder, Kristen; Forrester, Taylor; Akhtar, Tariq A. published an article.Electric Literature of 91-16-7 The title of the article was Evidence from stable-isotope labeling that catechol is an intermediate in salicylic acid catabolism in the flowers of Silene latifolia (white campion). And the article contained the following:

Main conclusion: A stable isotope-assisted mass spectrometry-based platform was utilized to demonstrate that the plant hormone, salicylic acid, is catabolized to catechol, a widespread secondary plant compound Accordingly, in this study a series of stable isotope feeding experiments were performed with Silene latifolia (white campion) to explore possible routes of SA breakdown. S. latifolia flowers that were fed a solution of [2H6]-salicylic acid emitted the volatile and potent pollinator attractant, 1,2-dimethoxybenzene (veratrole), which contained the benzene ring-bound deuterium atoms. After feeding flowers with [2H6]-catechol, the stable isotope was recovered in veratrole as well as its precursor, guaiacol. Addition of a trapping pool of guaiacol in combination with [2H6]-salicylic acid resulted in the accumulation of the label into catechol. Finally, we provide evidence for catechol O-methyltransferase enzyme activity in a population of S. latifolia that synthesizes veratrole from guaiacol. This activity was absent in non-veratrole emitting flowers. Taken together, these results imply the conversion of salicylic acid to veratrole in the following reaction sequence: salicylic acid > catechol > guaiacol > veratrole. This catabolic pathway for SA may also be embedded in other lineages of the plant kingdom, particularly those species which are known to accumulate catechol. The experimental process involved the reaction of 1,2-Dimethoxybenzene(cas: 91-16-7).Electric Literature of 91-16-7

The Article related to silene flower catechol salicylic acid catabolism isotope, catabolism, catechol, o-methyltransferase, phytohormone, salicylic acid, Plant Biochemistry: Development and Aging and other aspects.Electric Literature of 91-16-7

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On January 25, 2021, Gisbert-Alonso, A.; Navarro-Huerta, J. A.; Torres-Lapasio, J. R.; Garcia-Alvarez-Coque, M. C. published an article.Synthetic Route of 578-58-5 The title of the article was Global retention models and their application to the prediction of chromatographic fingerprints. And the article contained the following:

The resolution of samples containing unknown compounds of different nature, or without standards available, as is the case of chromatog. fingerprints, is still a challenge. Possibly, the most problematic aspect that prevents systematic method development is finding models that describe without bias the retention behavior of the compounds in the samples. In this work, the use of global models (able to describe the whole sample) is proposed as an alternative to the use of individual models for each solute. Global models contain parameters that are specific for each solute, while other parameters -related to the column and solvent- are common for all solutes. A special regression procedure is presented for the construction of global models, which are applied to predict highly complex chromatograms, such as chromatog. fingerprints, for diverse exptl. conditions in isocratic and gradient elution. Another interesting application is the prediction of mol. properties, such as log Po/w, from the specific solute parameters of the global models. The examined adapted models are based on the equations proposed by Snyder, Schoenmakers, Neue and Kuss, Jandera, and Bosch Roseś to describe the retention. In all cases, the predictive capability was very satisfactory. Two cases of study were considered: chromatograms of chamomile extracts analyzed using acetonitrile gradients, and a set of 145 known compounds in a wide range of structures and functionalities, eluted isocratically with acetonitrile/water mobile phases. The experimental process involved the reaction of 2-Methylanisole(cas: 578-58-5).Synthetic Route of 578-58-5

The Article related to global retention model chromatog fingerprints, global retention models, gradient elution, hplc, medicinal plants, prediction of chromatographic fingerprints, Organic Analytical Chemistry: Separations and other aspects.Synthetic Route of 578-58-5

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Rao, L. Vaikunta; Rao, K. Tirumala; Kandepi, V. V. Krishna Mohan published an article in 2020, the title of the article was A validated RP-HPLC method for estimation of related compounds in hydroxy naproxen.Related Products of 93-04-9 And the article contains the following content:

A simple, linear gradient liquid chromatog. method (RP-HPLC) is proposed for the simultaneous estimation of related compounds in hydroxy naproxen samples. Chromatog. separation was achieved on Zorbax SB C8 (150 x 4.6) mm, 3.5 μm particle size RRLC short column and eluent A used as 0.1% volume/volume trifluoroacetic acid in water and eluent B used as acetonitrile using Agilent RRLC (UHPLC) system. The mobile phase flow rate was 1.0 mL/min and the eluted compounds were monitored at 235 nm for related substance method and assay method. The excellent resolution was obtained between hydroxy naproxen and its related compounds, which were eluted within 25 min. The performance of the method was validated with respect to ICH guidelines for specificity, limit of detection, limit of quantification, linearity, accuracy, precision and robustness. The correlation coefficient(r) was > 0.995 for both the methods from linearity data and percentage of recovery is 98.0 to 102.0 for assay method and 80.0 to 120.0% for related substance method. Sensitivity of the method was found be less than 0.5 μg/mL. Peak homogeneity data for naproxen in the chromatograms from the selectivity solution obtained by use of the photodiode array detector demonstrated the specificity of the method for anal. of hydroxy naproxen in presence of the related compounds The experimental process involved the reaction of 2-Methoxynaphthalene(cas: 93-04-9).Related Products of 93-04-9

The Article related to hydroxy naproxen reverse phase hplc, Placeholder for records without volume info and other aspects.Related Products of 93-04-9

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem