Results 51 to 60 of about 543,485 (263)

Metal-free sp(3) C-H functionalization: a novel approach for the syntheses of selenide ethers and thioesters from methyl arenes [PDF]

, 2014
A DTBP-promoted metal-free and solvent-free formation of C-Se and C-S bonds through sp(3) C-H functionalization of methyl arenes with diselenides and disulfides is ...
Badsara, Satpal Singh, Hsieh, Ping-An, Lee, Chin-Fa, Liu, Yi-Chen, Liu, Yi-Wei, Lu, Shao-Yi, Zeng, Jing-Wen   +6 more
core   +1 more source

Solvent free preparation of N-substituted maleanilic acid

Bulletin of the Chemical Society of Ethiopia, 2013
Six N-maleanilic acids namely N-(4-carboxy)maleanilic acid (CAMAA), N-(4-bromo)maleanilic acid (BMAA), N-(4-hydroxy)maleanilic acid (HMAA), N-(3-hydroxy)maleanilic acid (mHMAA), N-(4-chloro)maleanilic acid (CMAA) and N-(4-methyl)maleanilic acid (MMAA ...
H. Saedi
doaj  

Large-Scale Solvent-Free Chlorination of Hydroxy-Pyrimidines, -Pyridines, -Pyrazines and -Amides Using Equimolar POCl3

Molecules, 2012
Chlorination with equimolar POCl3 can be efficiently achieved not only for hydroxypyrimidines, but also for many other substrates such as 2-hydroxy-pyridines, -quinoxalines, or even -amides.
Zhihua Sun, Yongjia Shen, Ye Xiang, Han Wang, Kun Wen, Le Wang, Xiaocheng Xu   +6 more
doaj   +1 more source

Synthetic and Biological Studies of Ethyl-7-methyl-3-(naphthalen-2-yl)-5-phenyl-5H-thiazolo[3,2-a]pyrimidine-6-carboxylate Derivatives

Orbital: The Electronic Journal of Chemistry, 2017
Novel series of ethyl-7-methyl-3-(naphthalen-2-yl)-5-phenyl-5H-thiazolo[3,2-a] pyrimidine-6-carboxylate (4a–g) heterocyclic compounds have been synthesized in a one-pot reaction under solvent-free conditions from 4-(naphthalen-2-yl)thiazol-2-amine (1 ...
Kandarp H. Patel, Yogesh S. Patel
doaj   +3 more sources

Metal-free cross-coupling reaction of aldehydes with disulfides by using DTBP as an oxidant under solvent-free conditions [PDF]

, 2014
A DTBP-promoted C–H thiolation of aldehydes with disulfides under metal-free and solvent-free conditions is described. The system shows good functional group tolerance to afford thioesters in moderate to excellent yields.
Badsara, Satpal Singh, Hsieh, Ping-An, Huang, Yu-Ting, Lee, Chin-Fa, Liu, Yi-Chen, Yi, Chih-Lun, Zeng, Jing-Wen   +6 more
core   +1 more source

Review of Alternative Solvents for Green Extraction of Food and Natural Products: Panorama, Principles, Applications and Prospects

Molecules, 2019
In recent years, almost all extraction processes in the perfume, cosmetic, pharmaceutical, food ingredients, nutraceuticals, biofuel and fine chemical industries rely massively on solvents, the majority of which have petroleum origins.
Farid Chemat, Maryline Abert Vian, Harish Karthikeyan Ravi, Boutheina Khadhraoui, Soukaina Hilali, Sandrine Perino, Anne-Sylvie Fabiano Tixier   +6 more
doaj   +1 more source

Microwave-Assisted Synthesis and Evaluation of Antimicrobial Activity of 3-{3-(s-Aryl and s-Heteroaromatic)acryloyl}-2Hchromen-2-one Derivatives [PDF]

, 2010
The exploration of potential utilization of microwaves as an energy source for heterocyclic synthesis was herein investigated using condensation of 3-acetylcoumarin (1) with aromatic and heteroaromatic aldehydes to afford the corresponding aromatic ...
Ajani, Al-Soud, Anderson, Anzari, Curir, DekicÌ, Devi, Gaber, Govori, Gürsoy, Hayes, Hwu, Jayashree, Kontogiorgis, Kostova, Kotali, Lacy, Larsen, Lee, Lewis, Lisgarten, Luszcski, Lévai, Majumdar, Mashelkar, Meteeva, Montagner Souza, Mouri, Neyts, Pivonka, Ragitha, Raviraj, Roma, Russell, Satyanarayana, Saxena, Schobert, Siddiqui, Son, Srinivas, Tamilvanan, Tassies, Tosun, Tran, Venugopala, Yamamoto, Yenjai, Yun   +47 more
core   +1 more source

Solvent-Free Coumarin Synthesis

Chemistry Letters, 2001
Abstract The synthesis of coumarins via Pechmann and Knoevenagel condensation reactions under solvent-free conditions is reported, in which waste minimization, simple operation and easier product work-up can be achieved.
Teizo Sugino, Koichi Tanaka
openaire   +1 more source

Metal- and Solvent-Free Synthesis of Phosphinothioates, Phosphonothioates, Phosphorothioates, and Related Selenium Derivatives: An Efficient Green Protocol

Molecules
Methodologies for the effective fabrication of phosphinothioates, phosphonothioates, and phosphorothioates have always been of great interest due to their widespread application in many research fields.
Yajie Fu, Hexia Ye, Xinyao Zhao, Yingle Liu, Junchen Li, Xiaojing Bi   +5 more
doaj   +1 more source

Solvent free method for intense vaporization of solid molecular and inorganic compounds [PDF]

, 2009
New tools have been developed for vaporization of solid precursors to meet the demands of high feed rate for CVD, ALD and other deposition ...
Bonnafous, Samuel, Caussat, Brigitte, Guillon, Hervé, Senocq, François, Vahlas, Constantin   +4 more
core