Tag: 200-300

Analysis of smell substances from fragrance and flavor industry waste gas was written by Ma, Fei;Li, Wei-ji;Fang, Qiong;Xiao, Zuo-bing;Ji, Hong-bing. And the article was included in Fenxi Shiyanshi in 2016.Formula: C15H22O2 The following contents are mentioned in the article:

A GC/MS method combined with air-bag collection and solid phase microextraction (SPME) was used to collect, extract and analyze the waste gas from fragrance and flavor industry. The conditions of SPME was optimized. The extraction time was 1 h, desorption time was 10 s, and CAR-PDMS-DVB fiber was used to extract waste gas. GC/MS was used to analyze the smell substances from corporations A and B. In total, 66 and 75 compounds were detected from corporations A and B, resp. The main smell components included limonene, cedrol, piperitol, ionone and thiol etc. This simple and convenient method can provide useful reference for anal. and treatment of smell substances from fragrance and flavor industry waste gas. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Formula: C15H22O2).

2-Ethylhexyl benzoate (cas: 5444-75-7) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Formula: C15H22O2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Rhodium carbenoid mediated cyclizations. Part 4. Synthetic approaches to oxepanes related to zoapatanol was written by Davies, Martin J.;Heslin, Julie C.;Moody, Christopher J.. And the article was included in Journal of the Chemical Society in 1989.Quality Control of (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate The following contents are mentioned in the article:

Synthetic approaches to the oxepane diterpene zoapatanol (I) are described in which the key step is the formation of the 7-membered cyclic ether by a Rh carbenoid cyclization. The approaches to the functionalized side chain of I centered on allylic alcs., (E)RCMe:CHCH₂OH [R = CH₂CH₂CH₂CHMeCHO, CH₂CH₂CH:CMeCH₂OH-(E)], prepared from geraniol. After asym. epoxidation, these substrates were converted to diazo alcs. II. Finally, cyclization with Rh(OAc)₂ gave oxepanes III which were characterized as silyl enol ethers IV. This study involved multiple reactions and reactants, such as (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5Quality Control of (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate).

(2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5) belongs to esters. Carboxylic acid esters of low molecular weight are colourless, volatile liquids with pleasant odours, slightly soluble in water. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Quality Control of (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Modeling Viscosities of Pure Compounds and Their Binary Mixtures Using the Modified Yarranton-Satyro Correlation and Free Volume Theory Coupled with SAFT + Cubic EoS was written by Polishuk, Ilya;Yitzhak, Abraham. And the article was included in Industrial & Engineering Chemistry Research in 2014.Computed Properties of C15H22O2 The following contents are mentioned in the article:

In the current study, two viscosity models, namely, the modified Yarranton-Satyro correlation (MYS) and the free volume theory (FVT) coupled with the SAFT + cubic EoS, have been implemented for correlation and prediction of data of about 20 pure compounds and their binary mixtures A representative selection of nearly 4000 exptl. points covering a large part of the available elevated pressure data has been considered. It has been demonstrated that MYS is characterized by superior predictive potential and exhibits higher overall accuracy. Nevertheless, this approach still does not completely address a fundamental problem of predicting viscosities in the entire PVT range without relying on exptl. data. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Computed Properties of C15H22O2).

2-Ethylhexyl benzoate (cas: 5444-75-7) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Computed Properties of C15H22O2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

General method for the synthesis of 1,3-dienes. Simple syntheses of β- and trans-α-farnescene from farnesol was written by Tanaka, Shin;Yasuda, Arata;Yamamoto, Hisashi;Nozaki, Hitosi. And the article was included in Journal of the American Chemical Society in 1975.COA of Formula: C14H24O2 The following contents are mentioned in the article:

The first highly stereo- and regioselective procedure for the transformation of allylic alcs. into 1,3-dienes is described. The method involves epoxidation of allylic alcs. with tert-butyl hydroperoxide-V catalyst followed by trimethylsilylation, diethylaluminum 2,2,6,6-tetramethylpiperidide (DATMP)-promoted oxirane ring opening producing 3-ene-1,2-diols stereo- and regioselectively, and deoxygenation of 1,2-diols through dibromides by PBr3-Cu2Br2-Zn. Thus, nerol, geraniol, (Z,E)-farnesol, and (E,E)-farnesol were converted into β-myrcene, trans-β-ocimene, β-and trans-α-farnesene, resp. AcO(CH2)8CH:CHCH:CH2, a sex pheromone isolated from the female red bollworm moth was also prepared by this method. This study involved multiple reactions and reactants, such as (E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7COA of Formula: C14H24O2).

(E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.COA of Formula: C14H24O2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Coalescent formulation studies: Efficiency and partition rates was written by Arendt, William D.;Strepka, Arron M.;Riley, Kristy. And the article was included in Proceedings of the Annual Meeting Technical Program of the FSCT in 2001.Application of 5444-75-7 The following contents are mentioned in the article:

Recently, 2-ethylhexyl benzoate (2EHB) was introduced as a low odor, lower volatility coalescent. 2EHB is not soluble in water and partitions to the polymer in a paint to provide improved coalescence. Partitioning and partition rates were studied to determine effect on coalescent performance. In addition, a study on coalescent efficiency of 2EHB in paint vs. 2,2,4-tri-Me, 1-3-pentanediol monoisobutyrate (TMB) was conducted. The evaluation included low temperature coalescence (porosity ratio) and scrub at low and room temperature The efficiency data developed indicated that 2EHB is more efficient than TMB in some paints. Guidelines on maximizing the efficiency of 2EHB as a coalescent are discussed. This study involved multiple reactions and reactants, such as 2-Ethylhexyl benzoate (cas: 5444-75-7Application of 5444-75-7).

2-Ethylhexyl benzoate (cas: 5444-75-7) belongs to esters. Volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Application of 5444-75-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Simple, stereospecific syntheses of some insect pheromones using the iron tricarbonyl protecting group was written by Knox, Graham R.;Thom, Ian G.. And the article was included in Journal of the Chemical Society, Chemical Communications in 1981.Related Products of 50767-78-7 The following contents are mentioned in the article:

(Diene)Fe(CO)₃ complexes have been used as starting materials for the stereospecific preparation of moth pheromones having (E)- and (E,E)-1,3-diene skeletons. E.g., acetylation of (CH₂:CH)₂Fe(CO)₃ with ClCO(CH₂)₆CO₂Et (AlCl₃) followed sequentially by reduction (LiAlH₄, AlCl₃), acetylation (Ac₂O, NaOAc), and cleavage of the Fe(CO)₃ group (Me₃NO) gave (E)-H₂C:CHCH:CH(CH₂)₈OAc (I) with a stereochem. purity >99%. I is the pheromone of the red bollworm moth. This study involved multiple reactions and reactants, such as (E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7Related Products of 50767-78-7).

(E)-Dodeca-9,11-dien-1-yl acetate (cas: 50767-78-7) belongs to esters. Esters are also usually derived from carboxylic acids. It may also be obtained by reaction of acid anhydride or acid halides with alcohols or by the reaction of salts of carboxylic acids with alkyl halides. Because of their lack of hydrogen-bond-donating ability, esters do not self-associate. Consequently, esters are more volatile than carboxylic acids of similar molecular weight.Related Products of 50767-78-7

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Reductive radical cyclizations of bromo acetals and (bromomethyl)silyl ethers of terpenoid alcohols was written by Lee, Edward R.;Lakomy, Ivo;Bigler, Peter;Scheffold, Rolf. And the article was included in Helvetica Chimica Acta in 1991.Application In Synthesis of (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate The following contents are mentioned in the article:

The tin hydride promoted and the reductive vitamin B₁₂ catalyzed radical cyclization of mixed 2-bromoacetaldehyde acetals and of (2-bromomethyl)dimethylsilyl ethers of allylic terpenoid alcs. was investigated: 3-oxadeca-5,9-dien-1-yl radicals undergo 5-exo cyclization to oxolanes, 3-oxa-2-siladeca-5,9-dien-1-yl radicals sequential 6-endoâ†?-exo tandem cyclization to cis-3-oxa-4-silabicyclo[4.3.0]nonanes I (R² = H, CH₂CO₂Me), and 3-oxa-2-silatetradeca-5,9,13-trien-1-yl radicals sequential 6-endoâ†?-endoâ†?-exo triple cyclization to trans-transoid-trans-12-oxa-11-silatricyclo[7.4.0.0^2,6]tridecanes (II). This study involved multiple reactions and reactants, such as (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5Application In Synthesis of (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate).

(2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Liquid esters of low volatility serve as softening agents for resins and plastics. Esters also include many industrially important polymers. Polymethyl methacrylate is a glass substitute sold under the names Lucite and Plexiglas; polyethylene terephthalate is used as a film (Mylar) and as textile fibres sold as Terylene, Fortrel, and Dacron.Application In Synthesis of (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Convenient, functional group-tolerant, transition metal-free synthesis of aryl and heteroaryl trifluoromethyl ketones with the use of methyl trifluoroacetate was written by Funabiki, Kazumasa;Hayakawa, Ayaka;Inuzuka, Toshiyasu. And the article was included in Organic & Biomolecular Chemistry in 2018.Quality Control of Ethyl 4-(2,2,2-Trifluoroacetyl)benzoate The following contents are mentioned in the article:

A new convenient, functional group-tolerant, transition metal-free route to aryl/heteroaryl trifluoromethyl ketones such as 4-EtO₂CC₆H₄COCF₃ under mild conditions was described. The reaction of not only aryl Grignard reagents carrying reducible electrophilic functional groups, such as ester and cyano groups, but also electron-deficient nitrogen-containing heteroaryl Grignard reagents with Me trifluoroacetate gave the corresponding aryl or heteroaryl trifluoromethyl ketones in good yields. Biol. assays revealed that new heteroaryl trifluoromethyl ketones carrying 2,4-dimethoxypyrimidine and 3,5-dimethylisoxazole rings showed good antitumor activities. This study involved multiple reactions and reactants, such as Ethyl 4-(2,2,2-Trifluoroacetyl)benzoate (cas: 898787-14-9Quality Control of Ethyl 4-(2,2,2-Trifluoroacetyl)benzoate).

Ethyl 4-(2,2,2-Trifluoroacetyl)benzoate (cas: 898787-14-9) belongs to esters. Esters are widespread in nature and are widely used in industry. In nature, fats are in general triesters derived from glycerol and fatty acids. Esters are responsible for the aroma of many fruits, including apples, durians, pears, bananas, pineapples, and strawberries. Esters are more polar than ethers but less polar than alcohols. They participate in hydrogen bonds as hydrogen-bond acceptors, but cannot act as hydrogen-bond donors, unlike their parent alcohols. This ability to participate in hydrogen bonding confers some water-solubility.Quality Control of Ethyl 4-(2,2,2-Trifluoroacetyl)benzoate

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Synthesis of 2,5-substituted piperidines: transposition of 1,4-substitution pattern for the analgesic drug R6582 was written by Baens, Nicole P.;Compernolle, Frans;Toppet, Suzanne M.;Hoornaert, Georges J.. And the article was included in Tetrahedron in 1993.HPLC of Formula: 149437-67-2 The following contents are mentioned in the article:

Cis-5-(1,3-dihydro-2-oxo-2H-benzimidazol-1-yl)-2-p-fluorophenyl-1-methylpiperidine I R = H) and the analogous cis- and trans-1-benzylpiperidines II (R = Ph) were prepared Key steps in the synthesis were the α-chlorination of 1-methyl- and 1-benzyl-6-p-fluorophenyl-2-piperidinone, and nucleophilic substitution of the resulting cis and trans 3-chloro lactams. ¹H NMR anal. for the epimeric 3,6-substituted lactam compounds revealed a preferred axial orientations for the 3-chloro substituent and an equatorial orientation for the 3-(oxobenzimidazolyl) group. For I, a conformational equilibrium was observed This was shifted to the [2ax,5eq] form for II (R = H). This study involved multiple reactions and reactants, such as Methyl 5-(4-fluorophenyl)-5-oxopentanoate (cas: 149437-67-2HPLC of Formula: 149437-67-2).

Methyl 5-(4-fluorophenyl)-5-oxopentanoate (cas: 149437-67-2) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Esterification is the general name for a chemical reaction in which two reactants (typically an alcohol and an acid) form an ester as the reaction product. Esters are common in organic chemistry and biological materials.HPLC of Formula: 149437-67-2

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

A convergent stereocontrolled synthesis of [3-¹⁴C]solanesol was written by Roe, Stephen J.;Oldfield, Mark F.;Geach, Neil;Baxter, Andrew. And the article was included in Journal of Labelled Compounds and Radiopharmaceuticals in 2013.Electric Literature of C12H18O3 The following contents are mentioned in the article:

In this communication, we report the synthesis of âˆ? mCi of [3-¹⁴C]solanesol (I) prepared from Et [3-¹⁴C]acetoacetate and (all-E)-octaprenyl bromide (II) in four steps, with a specific radioactivity of 19.83 mCi/mmol and with a chem./stereochem. and radiochem. purity of â‰?95%. Position 3 of the chain was selected for ¹⁴C labeling because of the metabolic stability of this position. Unlabeled (all-E)-octaprenol III necessary for this work was prepared via a convergent iterative ‘allyl-allyl’ coupling approach of precursors easily derived from readily available inexpensive starting materials.¹ Copyright © 2013 John Wiley & Sons, Ltd. This study involved multiple reactions and reactants, such as (2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5Electric Literature of C12H18O3).

(2E,6E)-3,7-Dimethyl-8-oxoocta-2,6-dien-1-yl acetate (cas: 37905-02-5) belongs to esters. Esters perform as high-grade solvents for a broad array of plastics, plasticizers, resins, and lacquers, and are one of the largest classes of synthetic lubricants on the commercial market. Polyesters are important plastics, with monomers linked by ester moieties. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Electric Literature of C12H18O3

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics