Results 41 to 50 of about 128,089 (280)

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

3-Amino-4-(diphenylamino)-1H-2-benzopyran-1-one

Molbank, 2022
Various synthetic methodologies to obtain 3,4-diaminoisocumarin nucleus have been reported and described. However, mechanistic analysis based on experimental evidence is lacking. Herein, we report the synthesis of the novel 3-amino-4-(diphenylamino)-1H-2-
Felipe Quiroga-Suavita, Ricaurte Rodríguez, Omar León   +2 more
doaj   +1 more source

Triazole-Directed Pd-Catalyzed C(sp2)–H Oxygenation of Arenes and Alkenes [PDF]

, 2016
Selective Pd-catalyzed C(sp2)–H oxygenation of 4-substituted 1,2,3-triazoles is described. Unlike previous metal-catalyzed C–H functionalization events, which preferentially occur at the activated heterocyclic C–H bond, the regioselective oxygenation of ...
Aizpurua Iparraguirre, Jesús María, Correa Navarro, Arkaitz, Irastorza Epelde, Aitziber   +2 more
core   +2 more sources

Asymmetric Synthesis of 1-Heteroaryl-1-arylalkyl Tertiary Alcohols and 1-Pyridyl-1-arylethanes by Lithiation-Borylation Methodology [PDF]

, 2013
The synthesis of highly enantioenriched alpha-heterocyclic tertiary alcohols has been achieved via lithiation-borylation of a configurationally stable lithiated carbamate and heterocyclic pinacol boronic esters followed by oxidation. Protodeboronation of
Aggarwal V. K., Biradar D. B., Biradar D. B., Carstens A., Charlotte G. Watson, Chen C.-A., Cozzi P. G., Dosa P. I., García C., García C., García C., Garg D. C., Greene M. A., Hatano M., Hatano M., Hatano M., Hoppe D., Hu Q., Kanai M., Luderer M. R., Madduri A. V. R., Madduri A. V. R., Maity P., Matsunaga N., Messaoudi S., Moree W. J., Nave S., Ou L., Pathak T. P., Ramón D. J., Ramón D. J., Shi S.-L, Shibasaki M., Song S., Starck J. P., Stymiest J. L., Taylor B. L. H., Varinder K. Aggarwal, Wada R., Weber B., Yus M., Yus M.   +41 more
core   +3 more sources

Highly Efficient and Diastereoselective Synthesis of New Pyrazolylpyrrolizine and Pyrazolylpyrrolidine Derivates by a Three-Component Domino Process

Molecules, 2014
Diastereoselective reactions between 4-formylpyrazoles, N-substituted maleimides and glycine derivates led to new series of pyrazolyldipyrrolo [3,4-a:3',4'-f]pyrrolizines and pyrazolylpyrrolo[3,4-c]pyrroles in good yields.
Jairo Quiroga, Jaime Gálvez, Rodrigo Abonia, Braulio Insuasty, Alejandro Ortíz, Justo Cobo, Manuel Nogueras   +6 more
doaj   +1 more source

Bulky-yet-flexible carbene ligands and their use in palladium cross-coupling [PDF]

, 2019
In recent years, several classes of new N-heterocyclic carbene (NHC) ligands were developed around the concept of flexible steric bulk. The steric hindrance of these ligands brings stability to the active species, while ligand flexibility still allows ...
Cazin, Catherine, Nahra, Fady, Vanden Broeck, Sofie   +2 more
core   +1 more source

Traceless Redox-Annulations of Alicyclic Amines

SynOpen, 2020
Amines such as 1,2,3,4-tetrahydroisoquinoline undergo redox­-neutral annulations with ortho-(nitromethyl)benzaldehyde. Benzoic­ acid acts as a promoter in these reactions, which involve concurrent amine α-C–H bond and N–H bond functionalization ...
Dillon R. L. Rickertsen, Longle Ma, Anirudra Paul, Khalil A. Abboud, Daniel Seidel   +4 more
doaj   +1 more source

Synthesis of nanocellulose aerogels and Cu-BTC/nanocellulose aerogel composites for adsorption of organic dyes and heavy metal ions

Scientific Reports, 2021
MOFs compounds with open metal sites, particularly Cu-BTC, have great potential for adsorption and catalysis applications. However, the powdery morphology limits their applications. One of the almost new ways to overcome this problem is to trap them in a
Nuhaa Shaheed, Shahrzad Javanshir, Maryam Esmkhani, Mohammad G. Dekamin, Mohammad Reza Naimi-Jamal   +4 more
doaj   +1 more source

Preparation of α-chitin-based nanocomposite as an effective biocatalyst for microwave aided domino reaction

Heliyon, 2019
In this paper, chitin (Ch) was extracted by an optimized method from cuttlebone of the Persian Gulf cuttlefish (Sepiidae, Cephalopoda). The extracted chitin was characterized by Fourier-transform infrared spectroscopy (FT-IR), X-ray powder diffraction ...
Sarvenaz Abolghassem, Shiva Molaei, Shahrzad Javanshir   +2 more
doaj   +1 more source

Latent olefin metathesis catalysts [PDF]

, 2009
Olefin metathesis is a versatile synthetic tool for the redistribution of alkylidene fragments at carbon-carbon double bonds. This field, and more specifically the development of task-specific, latent catalysts, attracts emerging industrial and academic ...
Drozdzak, Renata, Lozano Vila, Ana, Monsaert, Stijn, Van Der Voort, Pascal, Verpoort, Francis   +4 more
core   +2 more sources