Results 21 to 30 of about 100,051,810 (181)

SYNTHESIS OF 5-(2-THIENYL)-4,5-DIHYDROFURA NS AND 7-(2-THIENYL)-2,8-DIOXABICYCLO[3.3.0]OCT-3-ENES USING MANGANESE(III)-BASED CYCLIZATION

Tạp chí Khoa học Đại học Đà Lạt, 2013
1-Aryl-1-(2-thienyl)ethenes react with 2,4-pentanedione or ethylacetoacetate in boiling acetic acid under the presence of manganese triacetate dihydrate affording new 4,5-dihydrofurans bearing a thienyl ring at the 5 position.
Huỳnh Thanh Trúc, Nguyễn Văn Hạ
doaj   +1 more source

A Facile Synthesis of New Monoazo Disperse Dyes Derived from 4-Hydroxyphenylazopyrazole-5-amines: Evaluation of Microwave Assisted Dyeing Behavior

Molecules, 2012
A series of new monoazo disperse dyes containing pyrazolopyrimidine moieties was synthesized by coupling malononitrile or 3-aminocrotononitrile with 4-hydroxy- benzenediazonium chloride.
Alya M. Al-Etaibi, Morsy A. El-Apasery, Maher R. Ibrahim, Nouria A. Al-Awadi   +3 more
doaj   +1 more source

trans-Bis(1,1,1,5,5,5-hexafluoropentane-2,4-dionato-κ2O,O′)bis(4-methyl-1,2,3-selenadiazole-κN3)copper(II)

Acta Crystallographica Section E, 2010
In the title compound, [Cu(C5HF6O2)2(C3H4N2Se)2], the CuII atom (site symmetry overline{1}) is coordinated by two O,O′-bidentate 1,1,1,5,5,5-hexafluoro-2,4-pentanedione (hp) ligands and two 4-methyl-1,2,3-selenadiazole molecules, resulting in a
Neil M. Boag, Andrew D. Jackson, Paul D. Lickiss, Richard D. Pilkington, Alan D. Redhouse   +4 more
doaj   +1 more source

Volatiles and Transcriptome Profiling Revealed the Formation of ‘Taro-like’ Aroma in the Leaf of Pumpkin (Cucurbita moschata)

Agronomy, 2022
‘Taro-like’ odor is an important economic trait of pumpkin species. The metabolic and molecular bases of this aromatic trait remain largely unexplored.
Siying Zhao, Yuehan Qiu, Jianning Luo, Wenwen Wang, Haibin Wu, Xiaoxi Liu, Gangjun Zhao, Hao Gong, Xiaoming Zheng, Yujuan Zhong, Xian Yang, Junxing Li   +11 more
doaj   +1 more source

Corylus avellana L. Aroma Blueprint: Potent Odorants Signatures in the Volatilome of High Quality Hazelnuts

Frontiers in Plant Science, 2022
The volatilome of hazelnuts (Corylus avellana L.) encrypts information about phenotype expression as a function of cultivar/origin, post-harvest practices, and their impact on primary metabolome, storage conditions and shelf-life, spoilage, and quality ...
Simone Squara, Federico Stilo, Federico Stilo, Marta Cialiè Rosso, Erica Liberto, Nicola Spigolon, Giuseppe Genova, Giuseppe Castello, Carlo Bicchi, Chiara Cordero   +9 more
doaj   +1 more source

Kinetics of reaction of 1-chloro-2,4,6-trinitrobenzene with enolate ions of 2,4-pentanedione and methyl 3-oxobutanoate

, 1983
Reaction of 1-chloro-2,4,6-trinitrobenzene (I) with anions of 2,4-pentanedione (II) and methyl 3-oxobutanoate (III) produces 3-(2,4,6-trinitrophenyl)-2,4-pentanedione (IV) and methyl 2-(2,4,6-trinitrophenyl)-3-oxobutanoate (V), respectively, besides 2,4 ...
Jaroslav Andrle, Vojeslav Štěrba, Vladimír Macháček   +2 more
core   +1 more source

UV-visible Spectra and Gas-Phase Rate Coefficients for the Reaction of 2,3 pentanedione and 2,4-pentanedione with OH Radicals

, 2015
International audienceThe UV absorption cross-sections of 2,3-pentanedione and 2,4-pentanedione were measured and their reactions with OH were investigated in the gas-phase using a relative rate method.
El Dib, G., Ferhati, Azeddine, Chakir, Abdel, Messaadia, L.   +3 more
core   +1 more source

Changes in physicochemical properties and microbial community succession during leaf stacking fermentation

AMB Express, 2023
Leaf stacking fermentation involves enzymatic actions of many microorganisms and is an efficient and environmentally benign process for degrading macromolecular organic compounds.
Guanghai Zhang, Lu Zhao, Wei Li, Heng Yao, Canhua Lu, Gaokun Zhao, Yuping Wu, Yongping Li, Guanghui Kong   +8 more
doaj   +1 more source

De Novo Synthesis of Bacteriochlorins Bearing Four Trideuteriomethyl Groups

Organics, 2022
Site-specific introduction of isotopes in tetrapyrrole macrocycles provides the foundation for probing physicochemical features germane to photosynthetic energy-transduction processes, but has chiefly been done with porphyrins rather than the more ...
Haoyu Jing, Qun Tang, David F. Bocian, Jonathan S. Lindsey   +3 more
doaj   +1 more source

Inhalation dosimetry and dose-response analysis of diacetyl, 2, 3-pentanedione, and acetoin using respiratory tract vapor uptake models

Inhalation Toxicology
The objectives are to develop inhalation dosimetry models of the flavoring agents diacetyl, 2, 3-pentanedione, and acetoin to predict uptake throughout the rat and human respiratory tracts and use the results with histopathology data from 2-week, nose-only inhalation exposures in Sprague-Dawley rats to assess relationships between predicted dose and in 
Jeffry D. Schroeter, Julia S. Kimbell, Bahman Asgharian, Owen T. Price, Danielle Botelho, Madhuri Singal, Nikaeta Sadekar   +6 more
openaire   +2 more sources