Results 21 to 30 of about 2,122,800 (297)

Near‐surface seismic properties for elastic wavefield decomposition: Estimates based on multicomponent land and seabed recordings [PDF]

, 2003
Accurate knowledge of the seismic material properties in the immediate vicinity of the receivers represents a prerequisite for elastic wavefield decomposition.
Holliger, K., Curtis, A.; id_orcid, Muijs, R., Robertsson, J. O. A.   +3 more
core   +1 more source

Solvent-Free, One-Pot, Multicomponent Synthesis of Xanthene Derivatives [PDF]

, 2023
An efficient and environmentally benign one-pot condensation of cyclic diketones, aldehydes and naphthols was achieved with 1,4-diazabicyclo[2-2-2]octane supported on Amberlyst-15 as a novel catalyst, producing a variety of benzoxanthenones in good to ...
Ryan Borg, Bosica, Giovanna, Giovanna Bosica, Borg, Ryan, De Nittis, Riccardo, Riccardo De Nittis   +5 more
core   +1 more source

Atom- and step-economic synthesis of biaryl-substituted furocoumarins, furoquinolones and furopyrimidines by multicomponent reactions and one-pot synthesis

Green Processing and Synthesis, 2013
Atom-efficient multicomponent reactions (MCR) and step-efficient one-pot synthesis are developed for the synthesis of biaryl-substituted furocoumarins, furoquinolones, and furopyrimidines.
Kadam Asha, Bellinger Stephanie, Zhang Wei   +2 more
doaj   +1 more source

Efficient Synthesis of Boron-Containing α-Acyloxyamide Analogs via Microwave Irradiation

Molecules, 2013
In this report, a Passerini three-component reaction utilizing boron-containing carboxylic acids or aldehydes is discussed. The reaction was carried out in water and facilitated by the use of microwave irradiation.
Po-Shen Pan, Fang-Rong Chang, Chia-Hung Lin, Hsien-Chi Chen, Yang-Chang Wu, Pin-Yi Liu, Chih-Cheng Chai   +6 more
doaj   +1 more source

Stereoselective domino assembling of five molecules: one-pot approach to $(2^\primeR^*,3S^*,4^\primeR^*)$-$2^\prime,4^\prime$-diaryl-$1^\prime,4^\prime$-dihydro-$2^\primeH $-spiro[indoline-$3,3^\prime$-pyridines]

Comptes Rendus. Chimie, 2020
A new stereoselective multicomponent reaction has been found: domino assembling of two equivalents of benzaldehyde, malononitrile, oxindole and excess of ammonium acetate in acetonitrile resulted in the formation of previously unknown $(2^\primeR^*,3S ...
Ryzhkov, Fedor V., Elinson, Michail N., Ryzhkova, Yuliya E., Vereshchagin, Anatoly N., Goloveshkin, Alexander S., Egorov, Mikhail P.   +5 more
doaj   +1 more source

Versatile multicomponent reaction macrocycle synthesis using α-isocyano-ω-carboxylic acids [PDF]

, 2015
The direct macrocycle synthesis of α-isocyano-ω-carboxylic acids via an Ugi multicomponent reaction is introduced. This multicomponent reaction (MCR) protocol differs by being especially short, convergent, and versatile, giving access to 12-22 membered ...
Eman M. M. Abdelraheem, Constantinos G. Neochoritis (1508362), Dömling, Alexander, Abdelraheem, Eman M. M., Alexander Dömling (1312329), Eman M. M. Abdelraheem (1508356), Alexander Dömling, George P. Liao (1508359), Liao, George P., Neochoritis, Constantinos G., Kurpiewska, Katarzyna, David C. McGowan (1508350), Katarzyna Kurpiewska, Justyna Kalinowska-Tłuścik (1508347), George P. Liao, David C. McGowan, Constantinos G. Neochoritis, Katarzyna Kurpiewska (1508353), Kalinowska-Tłuścik, Justyna, McGowan, David C., Justyna Kalinowska-Tłuścik   +20 more
core   +3 more sources

Catalyzed and non-catalyzed synthesis of bioactive monastrol

Química Nova, 2014
The bioactive 3,4-dihydropyrimidin-2(1H)-thione derivative known as Monastrol was synthesized under catalyzed and non-catalyzed conditions through the Biginelli multicomponent reaction under solvent-free conditions.
Haline G. O. Alvim, Jose R. Correa, Taynara R. Machado, Wender A. Silva, Brenno A. D. Neto   +4 more
doaj   +1 more source

Divergent Synthesis of Novel Five-Membered Heterocyclic Compounds by Base-Mediated Rearrangement of Acrylamides Derived from a Novel Isocyanide-Based Multicomponent Reaction

Molecules, 2011
We have recently reported a novel multicomponent reaction between arylacetic acids and isocyanides, affording α-acyloxyacrylamides through an unusual mechanism.
Renata Riva, Andrea Basso, Luca Banfi
doaj   +1 more source

Steroid diversification by multicomponent reactions [PDF]

Beilstein Journal of Organic Chemistry, 2019
Reports on structural diversification of steroids by means of multicomponent reactions (MCRs) have significantly increased over the last decade. This review covers the most relevant strategies dealing with the use of steroidal substrates in MCRs, including the synthesis of steroidal heterocycles and macrocycles as well as the conjugation of steroids to
Leslie Reguera, Cecilia I. Attorresi, Javier A. Ramírez, Daniel G. Rivera   +3 more
openaire   +4 more sources

Bio-Catalysis in Multicomponent Reactions [PDF]

Molecules, 2020
Enzyme catalysis is a very active research area in organic chemistry, because biocatalysts are compatible with and can be adjusted to many reaction conditions, as well as substrates. Their integration in multicomponent reactions (MCRs) allows for simple protocols to be implemented in the diversity-oriented synthesis of complex molecules in chemo ...
Ndze Denis Jumbam, Wayiza Masamba
openaire   +3 more sources