Tag: M.W=100-150

Wang, Hui; Ramnani, Pankaj; Pham, Tung; Villarreal, Claudia Chaves; Yu, Xuejun; Liu, Gang; Mulchandani, Ashok published the artcile< Gas biosensor arrays based on single-stranded DNA-functionalized single-walled carbon nanotubes for the detection of volatile organic compound biomarkers released by huanglongbing disease-infected citrus trees>, Computed Properties of 104-76-7, the main research area is single stranded DNA SWCNT VOC biomarker huanglongbing disease; FET; HLB; SWNT; gas sensor; ssDNA; volatile organic compounds.

Volatile organic compounds (VOCs) released by plants are closely associated with plant metabolism and can serve as biomarkers for disease diagnosis. Huanglongbing (HLB), also known as citrus greening or yellow shoot disease, is a lethal threat to the multi-billion-dollar citrus industry. Early detection of HLB is vital for removal of susceptible citrus trees and containment of the disease. Gas sensors are applied to monitor the air quality or toxic gases owing to their low-cost fabrication, smooth operation, and possible miniaturization. Here, we report on the development, characterization, and application of elec. biosensor arrays based on single-walled carbon nanotubes (SWNTs) decorated with single-stranded DNA (ssDNA) for the detection of four VOCs-ethylhexanol, linalool, tetradecene, and phenylacetaldehyde-that serve as secondary biomarkers for detection of infected citrus trees during the asymptomatic stage. SWNTs were noncovalently functionalized with ssDNA using π-π interaction between the nucleotide and sidewall of SWNTs. The resulting ssDNA-SWNT hybrid structure and device properties were investigated using Raman spectroscopy, UV spectroscopy, and elec. measurements. To monitor changes in the four VOCs, gas biosensor arrays consisting of bare SWNTs before and after being decorated with different ssDNA were employed to determine the different concentrations of the four VOCs. The data was processed using principal component anal. (PCA) and neural net fitting (NNF).

Sensors published new progress about Biomarkers. 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Computed Properties of 104-76-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Gholinejad, Mohammad; Naghshbandi, Zhwan; Sansano, Jose M. published the artcile< Co/Cu bimetallic ZIF as New heterogeneous catalyst for reduction of nitroarenes and dyes>, Electric Literature of 5344-90-1, the main research area is cobalt copper bimetallic ZIF catalyst reduction dye nitroarene aminoarene.

Nowadays one of the great challenges is to design new bimetallic catalysts with enhanced catalytic activity, selectivity and recycling properties. In this work, the preparation of new Co/Cu bimetallic Zeolitic Imidazolate Framework (Co-Cu/ZIF) as an efficient catalyst for the reduction of nitro compounds and organic dyes is described. Co-Cu/ZIF was characterized with different techniques such as SEM, TEM, XRD, XPS, TGA, FT-IR and UV-vis absorption indicating formation of entirely uniform cubic particles. Using this catalyst, structurally different aromatic nitro compounds were reduced efficiently to corresponding amines in excellent yields. Kinetic studies revealed that the reduction rates of nitrophenol isomers follow 3-NP > 4-NP > 2-NP order. The catalytic activity of Co-Cu/ZIF was further investigated in the reduction of organic dyes such as methyl orange (MO) and rhodamine B (RhB). This catalyst was recycled for at least ten runs in the reduction of 4-nitrophenol without a noticeable decrease in activity and reused catalyst was characterized.

Applied Organometallic Chemistry published new progress about Aromatic amines Role: SPN (Synthetic Preparation), PREP (Preparation). 5344-90-1 belongs to class alcohols-buliding-blocks, and the molecular formula is C7H9NO, Electric Literature of 5344-90-1.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Lan, Xiao-Bing; Ye, Zongren; Liu, Jiahao; Huang, Ming; Shao, Youxiang; Cai, Xiang; Liu, Yan; Ke, Zhuofeng published the artcile< Sustainable and Selective Alkylation of Deactivated Secondary Alcohols to Ketones by Non-bifunctional Pincer N-heterocyclic Carbene Manganese>, Electric Literature of 403-41-8, the main research area is ketone preparation green chem; primary secondary alc alkylation heterocyclic carbene manganese catalyst; N-heterocyclic carbene; alkylation; borrowing hydrogen; manganese; pincer.

A sustainable and green route to access diverse functionalized ketones RC(O)CH2CH2R1 (R = Ph, thiophen-2-yl, 4-bromophenyl, etc.; R1 = Ph, naphthalen-2-yl, pyridin-3-yl, etc.) via dehydrogenative-dehydrative cross-coupling of primary R1CH2OH and secondary alcs. RCH(OH)CH3 is demonstrated. This borrowing hydrogen approach employing a pincer N-heterocyclic carbene Mn complex I•Br- (R2 = Me, iPr, Ph) displays high activity and selectivity. A variety of primary and secondary alcs. is well tolerant and results in satisfactory isolated yields. Mechanistic studies suggest that this reaction proceeds via a direct outer-sphere mechanism and the dehydrogenation of the secondary alc. substrates plays a vital role in the rate-limiting step.

ChemSusChem published new progress about Alkylation. 403-41-8 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H9FO, Electric Literature of 403-41-8.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Guo, Bin; Yu, Tian-Qi; Li, Hong-Xi; Zhang, Shi-Qi; Braunstein, Pierre; Young, David J.; Li, Hai-Yan; Lang, Jian-Ping published the artcile< Phosphine Ligand-Free Ruthenium Complexes as Efficient Catalysts for the Synthesis of Quinolines and Pyridines by Acceptorless Dehydrogenative Coupling Reactions>, Name: 1-(4-Fluorophenyl)ethyl Alcohol, the main research area is quinoline preparation green chem; aminobenzyl secondary alc dehydrogenative coupling ruthenium complex catalyst; pyridine preparation green chem; amino secondary alc dehydrogenative coupling ruthenium complex catalyst.

A series of phosphine-free Ru(III)/Ru(II) complexes of NH functionalized N N N pincer ligands exhibit excellent activity for acceptorless dehydrogenative coupling (ADC) of secondary alcs. RCH(OH)CH2R1 [R = Ph, thiophen-2-yl, Et, etc.; R1 = H, Me, Et, n-Pr; RR1 = -(CH2)4-] and bicyclo[2.2.1]heptan-2-ol with 2-aminobenzyl 2-NH2-R3C6H3CH(R2)OH [R2 = H, Me; R3 = H, 5-Me, 4-Cl] or γ-amino alcs. R4CH(NH2)(CH2)2OH (R4 = Ph, Me) to quinolines I (R5 = H, 6-Me, 7-Cl), 1,2,3,4-tetrahydro-1,4-methanoacridine and pyridines II. Ru(III) complexes [LRuCl3] III (R6 = R7 = R8 = H, R9 = Cl; R6 = H, R7 = R8 = Me, R9 = Cl; R6 = R7 = H, R8 = Ph, R9 = Cl, etc.) were obtained by refluxing RuCl3.xH2O with the corresponding ligand in EtOH. Five Ru(II) complexes [LRu(DMSO-κS)Cl2] III [R9 = S(CH3)2(O)] were formed by reducing the corresponding Ru(III) complex in refluxing EtOH. The latter complexes could also be prepared directly by refluxing Ru(DMSO)4Cl2 with the corresponding ligand in EtOH. These Ru(III) and Ru(II) complexes, especially III exhibited high catalytic efficiency and broad functional group tolerance in ADC reactions of secondary alcs. with 2-aminobenzyl or γ-amino alcs. to quinolines I and pyridines II. A detail mechanistic study indicated that the Ru(III) complex III (R9 = Cl) was reduced into the Ru(II) species III (R9 = S(CH3)2(O)), which was the active catalytic center for ADC via a Ru-H/N-H bifunctional outer-sphere mechanism. This protocol provides a reliable, atom-economical and environmentally benign procedure for C-N and C-C bond formation.

ChemCatChem published new progress about Amino alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 403-41-8 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H9FO, Name: 1-(4-Fluorophenyl)ethyl Alcohol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zhang, Meng-Juan; Li, Hong-Xi; Young, David J.; Li, Hai-Yan; Lang, Jian-Ping published the artcile< Reaction condition controlled nickel(II)-catalyzed C-C cross-coupling of alcohols>, Recommanded Product: (2-Aminophenyl)methanol, the main research area is nickel cluster catalyst preparation crystal structure; primary secondary alc acceptorless dehydrogenation coupling; aryl alkyl ketone preparation; unsaturated ketone preparation; quinoline preparation.

A controlled approach to a diverse range of β-alkylated secondary alcs., α-alkylated ketones and α,β-unsaturated ketones using the acceptorless dehydrogenation coupling methodol. employing a Ni(II) 4,6-dimethylpyrimidine-2-thiolate cluster catalyst under different reaction conditions was reported. This catalyst could tolerate a wide range of substrates and exhibited a high activity for the annulation reaction of secondary alcs. with 2-aminobenzyl alcs. to yield quinolines. This work is an example of precise chemoselectivity control by careful choice of reaction conditions.

Organic & Biomolecular Chemistry published new progress about Alkyl aryl ketones Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 5344-90-1 belongs to class alcohols-buliding-blocks, and the molecular formula is C7H9NO, Recommanded Product: (2-Aminophenyl)methanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Huang, Qiang; Su, Yu-Xuan; Sun, Wei; Hu, Meng-Yang; Wang, Wei-Na; Zhu, Shou-Fei published the artcile< Iron-Catalyzed Vinylzincation of Terminal Alkynes>, Computed Properties of 10602-04-7, the main research area is iron complex containing tridentate phenanthrolineimine ligand preparation catalyst vinylzincation; crystal structure iron complex containing tridentate phenanthrolineimine ligand; terminal alkyne vinylation vinylzincation iron phenanthrolineimine catalyst.

Organozinc reagents are among the most commonly used organometallic reagents in modern synthetic chem., and multifunctionalized organozinc reagents can be synthesized from structurally simple, readily available ones by alkyne carbozincation. However, this method suffers from poor tolerance for terminal alkynes, and transformation of the newly introduced organic groups is difficult, which limits its applications. Herein, the authors report a method for vinylzincation of terminal alkynes catalyzed by newly developed Fe catalysts bearing 1,10-phenanthroline-imine ligands. This method provides efficient access to novel organozinc reagents with a diverse array of structures and functional groups from readily available vinylzinc reagents and terminal alkynes. The method features excellent functional group tolerance (tolerated functional groups include amino, amide, cyano, ester, hydroxyl, sulfonyl, acetal, phosphono, pyridyl), a good substrate scope (suitable terminal alkynes include aryl, alkenyl, and alkyl acetylenes bearing various functional groups), and high chemoselectivity, regioselectivity, and stereoselectivity. The method could significantly improve the synthetic efficiency of various important bioactive mols., including vitamin A. Mechanistic studies indicate that the new Fe-1,10-phenanthroline-imine catalysts developed in this study has an extremely crowded reaction pocket, which promotes efficient transfer of the vinyl group to the alkynes, disfavors substitution reactions between the Zn reagent and the terminal C-H bond of the alkynes, and prevents the further reactions of the products. The authors’ findings show that Fe catalysts can be superior to other metal catalysts in terms of activity, chemoselectivity, regioselectivity, and stereoselectivity when suitable ligands were used.

Journal of the American Chemical Society published new progress about Alkadienes Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 10602-04-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C9H8O, Computed Properties of 10602-04-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Janczewski, Lukasz; Walczak, Malgorzata; Fraczyk, Justyna; Kaminski, Zbigniew J.; Kolesinska, Beata published the artcile< Microwave-assisted Cannizzaro reaction-Optimisation of reaction conditions>, Quality Control of 52160-51-7, the main research area is aldehyde microwave irradiation Cannizzaro reaction; carboxylic acid alc preparation.

The microwave-assisted Cannizzaro reaction was studied in order to develop fully reproducible synthetic protocols for transformation of aldehydes to carboxylic acid and alcs. Optimized were the following process parameters: power, temperature, and time. Aromatic, heteroaromatic and aliphatic aldehydes were used in the studies. It was found that furfural, thiophene-2-carbaldehyde, pyridinecarboxaldehyde and aromatic aldehydes react under mild conditions, while 1-methyl-pyrrole-2-carboxaldehyde derivatives and aliphatic aldehydes require more drastic reaction conditions and a longer exposure time to microwave radiation.

Synthetic Communications published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 52160-51-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C6H9NO, Quality Control of 52160-51-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Budweg, Svenja; Junge, Kathrin; Beller, Matthias published the artcile< Transfer-dehydrogenation of secondary alcohols catalyzed by manganese NNN-pincer complexes>, Reference of 403-41-8, the main research area is manganese pincer complex preparation crystal structure; secondary alc manganese pincer complex catalyst transfer dehydrogenation; ketone preparation.

Novel catalytic systems based on pentacarbonylmanganese bromide and stable NNN-pincer ligands were presented for the transfer-dehydrogenation of secondary alcs. to gave the corresponding ketones in good to excellent isolated yields. Best results were obtained using di-picolylamine derivatives as ligands and acetone as an inexpensive hydrogen acceptor. Besides high activity for benzylic substrates, aliphatic alcs., as well as steroid derivatives, were readily oxidized in the presence of the optimal phosphorus-free catalyst.

Chemical Communications (Cambridge, United Kingdom) published new progress about Crystal structure. 403-41-8 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H9FO, Reference of 403-41-8.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Pawlus, Sebastian; Grzybowski, Andrzej; Kolodziej, Slawomir; Wikarek, Michal; Dzida, Marzena; Goralski, Pawel; Bair, Scott; Paluch, Marian published the artcile< Density Scaling Based Detection of Thermodynamic Regions of Complex Intermolecular Interactions Characterizing Supramolecular Structures>, Quality Control of 104-76-7, the main research area is methyl pentanol intermol interaction supramol structure density scaling thermodn.

Abstract: In this paper, applying the d. scaling idea to an associated liquid 4-methyl-2-pentanol used as an example, we identify different pressure-volume-temperature ranges within which mol. dynamics is dominated by either complex H-bonded networks most probably leading to supramol. structures or non-specific intermol. interactions like van der Waals forces. In this way, we show that the d. scaling law for mol. dynamics near the glass transition provides a sensitive tool to detect thermodn. regions characterized by intermol. interactions of different type and complexity for a given material in the wide pressure-volume-temperature domain even if its typical form with constant scaling exponent is not obeyed. Moreover, we quantify the observed decoupling between dielec. and mech. relaxations of the material in the d. scaling regime. The suggested methods of analyses and their interpretations open new prospects for formulating models based on proper effective intermol. potentials describing physicochem. phenomena near the glass transition.

Scientific Reports published new progress about Dielectric loss Role: PRP (Properties). 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Quality Control of 104-76-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zhuang, Jinda; Xiao, Qing; Feng, Tao; Huang, Qingrong; Ho, Chi-Tang; Song, Shiqing published the artcile< Comparative flavor profile analysis of four different varieties of Boletus mushrooms by instrumental and sensory techniques>, Safety of 2-Ethylhexan-1-ol, the main research area is Boletus flavor sensory evaluation; Aroma-active compounds; Boletus; Gas chromatography–olfactometry; Odor activity value; Partial least squares regression; Solvent assisted flavor evaporation.

Mushrooms from different varieties and manufacturing methods show different flavor profiles. In order to understand the sensory attributes and aroma compounds of boletus, the discrepancy of aroma profile in four varieties of boletus was determined using gas chromatog.-olfactometry combined with sensory anal. and partial least squares regression anal. (PLSR). Sensory anal. revealed that Boletus Edulis had potent roasted and buttery attributes, Boletus Aereu exhibited woody note and Boletus Auripes Pk presented powerful floral and smoky aromas, while Boletus Rubellus Krombh showed weakness in five sensory attributes. The quant. anal. revealed that the dominant volatiles in boletus samples were esters, aldehydes, acids, alcs., pyrazines, ketones and phenols. A total of 42 potent aroma compounds (OAVs > 1) were determined by aroma extract dilution anal. and quant. anal. 1-Octen-3-ol and 2,5-dimethylpyrazine were the potent aroma compounds among four boletus samples. In addition, the key aroma compounds were 3-(methylthio)propionaldehyde and 2,6-dimethylpyrazine in Boletus edulis. Isovaleric acid, 2,6-dimethylpyrazine, benzeneacetaldehyde and (E)-2-octenal were the key aroma compounds in Boletus aereu. In Boletus auripes Pk, isovaleric acid, 3-ethylphenol and 2,6-dimethylpyrazine were the key aroma compounds, while 3-methylvaleric acid, isovaleric acid and 2,3-dimethylpyrazine significantly contributed to the aroma of boletus rubellus Krombh.

Food Research International published new progress about Acids Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 104-76-7 belongs to class alcohols-buliding-blocks, and the molecular formula is C8H18O, Safety of 2-Ethylhexan-1-ol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts