Results 41 to 50 of about 81,237 (352)

A mechanochemical approach to access the proline–proline diketopiperazine framework

Beilstein Journal of Organic Chemistry, 2017
Ball milling was exploited to prepare a substituted proline building block by mechanochemical nucleophilic substitution. Subsequently, the mechanocoupling of hindered proline amino acid derivatives was developed to provide proline–proline dipeptides ...
Nicolas Pétry, Hafid Benakki, Eric Clot, Pascal Retailleau, Farhate Guenoun, Fatima Asserar, Chakib Sekkat, Thomas-Xavier Métro, Jean Martinez, Frédéric Lamaty   +9 more
doaj   +1 more source

One-Pot Route from Halogenated Amides to Piperidines and Pyrrolidines

Molecules, 2022
Piperidine and pyrrolidine derivatives are important nitrogen heterocyclic structures with a wide range of biological activities. However, reported methods for their construction often face problems of requiring the use of expensive metal catalysts ...
Qiao Song, Sheng Wang, Xiangui Lei, Yan Liu, Xin Wen, Zhouyu Wang   +5 more
doaj   +1 more source

Crystal structure and Hirshfeld surface analysis of 4′-(2-chlorophenyl)-1′-methyl-3′′-phenyl-7′′,8′′-dihydro-5′′H-dispiro[indoline-3,2′-pyrrolidine-3′,6′′-isoquinoline]-2,5′′-dione

Acta Crystallographica Section E: Crystallographic Communications, 2018
In the title dispiro compound, C32H26ClN3O2, the cyclohexanone ring of the isoquinoline unit has a distorted envelope conformation, with the methylene C atom adjacent to the spiro C atom as the flap.
R. Vishnupriya, C. Selva Meenatchi, J. Suresh, R. V. Sumesh, R. Ranjith Kumar, P. L. Nilantha Lakshman   +5 more
doaj   +1 more source

Stabilization of colloidal palladium particles by a block copolymer of polystyrene and a block containing amide sidegroups [PDF]

, 1996
A block copolymer of polystyrene and poly(tert-butylmethacrylate) was prepared by anionic polymerization. The ester groups of the poly(tert-butylmethacrylate) were hydrolyzed, after wich the remaining carboxyl groups were reacted with pyrrolidine.
Hempenius, M., Klok, H.-A., Möller, M., Roescher, A.   +3 more
core   +2 more sources

Photoinduced 1,2,3,4-tetrahydropyridine ring conversions

Beilstein Journal of Organic Chemistry, 2015
Stable heterocyclic hydroperoxide can be easily prepared as a product of fast oxidation of a 1,2,3,4-tetrahydropyridine by 3O2 if the solution is exposed to sunlight.
Baiba Turovska, Henning Lund, Viesturs Lūsis, Anna Lielpētere, Edvards Liepiņš, Sergejs Beljakovs, Inguna Goba, Jānis Stradiņš   +7 more
doaj   +1 more source

Crystal structure of 4′-(2-methoxyquinolin-3-yl)-1′-methyldispiro[indan-2,2′-pyrrolidine-3′,3′′-indoline]-1,3,2′′-trione

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, C30H23N3O4, the central 1-methylpyrrolidine ring adopts a twist conformation on the N—CH2 bond. The pyrrolidin-2-one ring of the indolin-2-one ring system also has a twist conformation on the C—C bond involving the spiro C atom and
Sadasivam Mathusalini, Vijayan Viswanathan, Palathurai Subramaniam Mohan, Chia-Her Lin, Devadasan Velmurugan   +4 more
doaj   +1 more source

Blockade of T-cell activation by dithiocarbamates involves novel mechanisms of inhibition of nuclear factor of activated T cells. [PDF]

, 1997
Dithiocarbamates (DTCs) have recently been reported as powerful inhibitors of NF-kappaB activation in a number of cell types. Given the role of this transcription factor in the regulation of gene expression in the inflammatory response, NF-kappaB ...
Algarté M., Aramburu J., Baeuerle P. A., Baichwal V. R., Beals C. R., Beg A. A., Bessho R., Boise L. H., Burns G. F., Chuvpilo S. D., Cockerill P. N., Cockerill P. N., Cotter T. G., Crabtree G. R., Crabtree G. R., Durand D. B., Goldfeld A. E., Gómez del Arco P., Hibi M., Ho S. N., Ho S. N., Hodge M. R., Hoey T., Izquierdo M., Jain J., Jain J., Lee H. J., Liu J., Loh C., Los M., Luo C., Luo C., Luo C., Masuda E. S., Masuda E. S., Mauri N., McCaffrey P. G., Meyer M., Minden A., Muoz C., Muoz C., Nobel C. S. I., Northrop J. P., Prieschl E. E., Radler-Pohl A., Rao A., Reisinger E. C., Rooney J. W., Ruff V. A., Schenk H., Schreck R., Schreck R., Schreiber E., Schreiber S. L., Schulze-Osthoff K., Schulze-Osthoff K., Sen C. K., Shaw J. P., Shaw K. T., Shibasaki F., Spits H., Staal F. J. T., Szabo S. J., Sánchez-Mateos P., Timmerman L. A., Traenckner E.B., Truneh A., Van Antwerp D. J., Wang C., Weiss A., Wu M., Xanthoudakis S., Yano O.   +72 more
core   +3 more sources

Targeting the Membrane‐Embedded Rhomboid Protease GlpG: A Multimodal Strategy for Inhibitor Discovery and Mechanistic Insight

Angewandte Chemie, EarlyView.
Created in BioRender. Bohg, C. (2026) https://BioRender.Com/ vi9hi4f. Rhomboid proteases are a mechanistically unique and evolutionarily conserved protein family. Despite their pharmacological relevance, the development of selective inhibitors has lagged behind that of soluble proteases.
Claudia Bohg, Yurii Dubanych, Spyridon Kosteletos, Taoran Xiao, Martin Neuenschwander, Tillmann Utesch, Michael Lisurek, Carl Öster, Andreas Oder, Carola Seyffarth, Kathrin Bach, Denise‐Liù Gracias Leone, František Filandr, Marc Wegert, Sascha Lange, Henry Sawczyc, Jens Peter von Kries, Christian P. R. Hackenberger, Edgar Specker, Han Sun, Kvido Stříšovský, Adam Lange   +21 more
wiley   +2 more sources

Syn-Ethyl 1-hydroxy-7-methoxy-2,3-dihydro-1H-pyrrolo[3,4-b]quinolone-3-carboxylate HCl Salt

Molbank, 2015
This short note describes a one-step synthesis of the title compound from commercially available starting materials and reports its full spectroscopic characterization data.
Marcus Baumann, Ian R. Baxendale
doaj   +1 more source

Three-electron two-centred bonds and the stabilisation of cationic sulfur radicals [PDF]

, 2014
Electronic communication in biological systems is fundamental to understanding protein signalling and electron hopping pathways. Frequently studied examples are cationic radical methionine and its functional derivatives.
Carbery, DR, Hendon, CH, Walsh, A
core   +1 more source