Results 31 to 40 of about 10,504 (214)

Thermal photons as a measure for the rapidity dependence of the temperature [PDF]

, 1995
The rapidity distribution of thermal photons produced in Pb+Pb collisions at CERN-SPS energies is calculated within scaling and three-fluid hydrodynamics. It is shown that these scenarios lead to very different rapidity spectra.
A. Dumitru, A. Dumitru, A. Dumitru, A. Keitz von, A. Rosenhauer, A.A. Amsden, B. M�ller, B. Sinha, C. Song, D. H. Rischke, D. R�hrich, D.H. Youngblood, E.V. Shuryak, G. Baym, H. Gersdorff von, H. St�cker, H.W. Barz, H.W. Barz, I.N. Mishustin, J. A. Maruhn, J. Alam, J. Kapusta, J. Kapusta, J.A. Maruhn, J.D. Bjorken, K. Kajantie, L. McLerran, L. McLerran, L. Xiong, M. Creutz, M. Hofmann, M.H. Thoma, M.M. Sharma, N. Arbex, P.V. Ruuskanen, R. Vogt, R.B. Clare, R.C. Hwa, S. Sarkar, U. Katscher, U. Katscher, W. Greiner, W. Scheid   +42 more
core   +2 more sources

Synthesis of Chromeno[3,4-b]piperazines by an Enol-Ugi/Reduction/Cyclization Sequence

Molecules, 2021
Keto piperazines and aminocoumarins are privileged building blocks for the construction of geometrically constrained peptides and therefore valuable structures in drug discovery.
Ana Bornadiego, Ana G. Neo, Carlos F. Marcos   +2 more
doaj   +1 more source

Applications of the Ugi reaction with ketones [PDF]

Tetrahedron Letters, 2008
A convenient synthesis of highly functionalized, α,α-disubstituted amino acid amide derivatives has been accomplished by using cyclic and acyclic ketones as the carbonyl inputs in the Ugi multicomponent reaction. An application of this extension of the Ugi reaction to the synthesis of α,α-divinyl amino acids that may be cyclized via ring-closing ...
Suvi T M, Simila, Stephen F, Martin
openaire   +2 more sources

Oxa-Michael/Ugi-Smiles cascade reaction with α,β-unsaturated aldehydes

Results in Chemistry, 2022
Use of α,β-unsaturated aldehydes as components in Ugi-Smiles couplings of 2-nitrophenol with alkyl isocyanides and primary amines provides ready access to γ-alkoxy substituted amides when performed in the presence of alcoholic solvents. The observed five
Aubrey Thessing, Robert Ayres, Joshua Jones, Haleigh Bauer, Maryam Zangi, Sarah B. Luesse   +5 more
doaj   +1 more source

Silver(I) triflate-catalyzed protocol for the post-ugi synthesis of spiroindolines

, 2019
A silver(I) triflate-catalyzed protocol for the post-Ugi synthesis of tetracyclic spiroindolines has been developed. The protocol worked best for indole-3-carbaldehyde-derived Ugi adducts obtained using anilines and 3-aryl propiolic acids.
Hasan, Muhammad, Pereshivko, Olga P., Peshkov, Anatoly A., Peshkov, Vsevolod A., Van der Eycken, Erik V., Van Hecke, Kristof, Zaman, Manzoor   +6 more
core   +1 more source

The CombiUgi Project and Closing the Open Science Loop [PDF]

, 2007
This presentation combines 2 blog posts explaining the CombiUgi project and the predicted anti-tumor activity of a virtual library of 68,000 ...
Dan Zaharevitz, Jean-Claude Bradley, Rajarshi Guha, Rikesh Parikh   +3 more
core   +2 more sources

Synthesis of Novel Diterpenic Peptides via the Ugi Reaction and Their Anticancer Activities

Molbank, 2023
Novel diterpenic peptide derivatives were synthesized via the Ugi four-component reaction at ambient temperature. The protocol employed a reaction between formaldehyde, benzyl amine, the corresponding diterpene acid, and ethyl 2-isocyanoacetate.
Anna A. Smirnova, Liana M. Zakirova, Irina E. Smirnova, Elena V. Tretyakova   +3 more
doaj   +1 more source

NMR-Based Structural Analysis of Highly Substituted Pyridines From Kondrat'eva Aza-Diels-Alder Cycloadditions. [PDF]

Magn Reson Chem
We report the results from a kinetic and mechanistic investigation of an inverse‐electron‐demand Diels–Alder (IEDDA) cycloaddition involving an oxazole‐type diene synthesized via an Ugi–Zhu multicomponent reaction (UZ‐3CR). ABSTRACT Pyridines are a crucial class of heterocycles with widespread applications in natural products, pharmaceuticals, and ...
Suárez-Moreno GV, Méndez F, Gutierrez-Carrillo A, Rincón-Guevara MA, Amador-Sánchez YA, Islas-Jácome A, González-Zamora E.   +6 more
europepmc   +2 more sources

Direct polymerization of levulinic acid via Ugi multicomponent reactiont [PDF]

, 2016
A robust, direct and efficient approach has been developed for the utilization of levulinic acid (LevA) as a building block in the synthesis of polyamides.
Alonso, C. Remzi Becer, Chen, Deng, Dömling, Gangloff, Giovenzana, Giovenzana, Harriman, Isikgor, Jida, Kakuchi, Klingler, Kreye, Leibig, Lin, Manuel Hartweg, Mumm, Mäki-Arvela, Mülhaupt, Palkovits, Passerini, Rose, Rudick, Ruijter, Sehlinger, Sehlinger, Sehlinger, Sehlinger, Short, Solleder, Solleder, Thompson, Tye, Ugi, Ugi, Yang, Yang, Zhang   +38 more
core   +1 more source

Synthesis of Fully Functionalized 3-Bromoazaspiro[4.5]trienones through Ugi Four-Component Reaction (Ugi-4CR) followed by ipso-Bromocyclization

SynOpen, 2018
Biologically attractive azaspiro[4.5]trienones have been prepared via Ugi four-component reaction (Ugi-4CR) followed by bromine-mediated ipso-cyclization.
Saeed Balalaie, Hadiseh Bakhshaei Ghoroghaghaei, Nahid S. Alavijeh, Fatemeh Darvish, Frank Rominger, Hamid Reza Bijanzadeh   +5 more
doaj   +1 more source