Results 91 to 100 of about 14,737 (217)

Passerini- ja Ugi-reaktiot luonnonainesynteesissä

, 2015
Tämän pro gradu -tutkielman kirjallisessa osassa käsitellään Passerini- ja Ugi-reaktioita luonnonainesynteesin näkökulmasta. Lisäksi kirjallisessa osuudessa esitellään luonnonainesynteesejä joissa näitä multikomponenttireaktioita on hyödynnetty ...
Hartikainen, Saara
core   +1 more source

Synthesis of Novel Steroid-Peptoid Hybrid Macrocycles by Multiple Multicomponent Macrocyclizations Including Bifunctional Building Blocks (MiBs)

Molecules, 2007
Two new groups of cholane-peptoid hybrid macrocycles were produced by implementing novel combinations of the MiB methodology. Steroid-based hybrid macrolactams including heterocycle and aryl moieties were obtained by utilizing cholanic dicarboxylic acids
Ludger A. Wessjohann, Daniel G. Rivera
doaj   +1 more source

Psychological health as a mediator in the association between diet and upper gastrointestinal cancer: insights from a large-scale population-based screening project

The Lancet Regional Health. Western Pacific
Background: Upper gastrointestinal (UGI) cancer, including esophageal cancer and gastric cancer, poses a significant global health burden. While unhealthy dietary patterns are recognized risk factors, increasing attention is being paid to the role of ...
Yueying Zhang, Shanrui Ma, Xinqing Li, Shaoming Wang, Wenqiang Wei   +4 more
doaj   +1 more source

City-civil society dynamics in urban green infrastructure development in Munich: governance features and their impacts

Nature-Based Solutions
Global climate change and urbanization exacerbate challenges like biodiversity loss and environmental injustice. Urban green infrastructure (UGI) offers ecological, social, and economic benefits, fostering resilient and sustainable cities.
Elizaveta Fakirova, Martina van Lierop, Hade Dorst, Stephan Pauleit   +3 more
doaj   +1 more source

Metal-Free Iodine/TEMPO-Mediated Aerobic Oxidative Ugi-Type Multicomponent Reactions with Tertiary Amines

, 2019
A novel aerobic oxidative Ugi-type multicomponent reaction (MCR) with tertiary amines was developed. The reaction was initiated by C­(sp3)–H oxidation of the amine, followed by nucleophilic attack on the highly reactive isocyanide, generating nitrilium ...
Dengke Li (4067614), Xianfu Shen (4817457), Jian Lei (495592)   +2 more
core   +1 more source

Synthesis of novel tetrahydroindeno[1,2-b]pyrrolidines via Ugi multicomponent and palladium-catalyzed aerobic oxidative cyclization

, 2016
Novel tetrahydroindeno[1,2-b]pyrrolidines were conveniently prepared in moderate to good yields via a sequential Ugi multicomponent reaction or Staudinger/aza-Wittig/Ugi combination, followed by the palladium-catalyzed aerobic oxidative cyclization of ...
Eduardo Nieto-Sepúlveda (1916032), Eugenio Hernandez-Fernandez (1916035), Tannya R. Ibarra-Rivera (1916029), Rocío Gámez-Montaño (1916041), Verónica M. Rivas Galindo (2571688), Manuel Alejandro Rentería-Gómez (1916038)   +5 more
core   +1 more source

Upper Gastrointestinal Endoscopy by Pediatric Surgeons: Our Early Experience

Journal of Indian Association of Pediatric Surgeons
Introduction: Pediatric upper gastrointestinal (UGI) endoscopy is an important procedure in the management of gastrointestinal pathologies. Conventionally, it has been the forte of medical gastroenterologists.
Adnan Sayeed, Anand Alladi, Venkatesh Kesarla Lakshmaiah   +2 more
doaj   +1 more source

Substituent Effects in Ugi–Smiles Reactions

, 2013
International audienceIn a recent communication, we described the mechanism of the well-known Ugi-type reactions with a model system ( J. Org. Chem. 2012, 77, 1361−1366).
Fleurat-Lessard, Paul, Chéron, Nicolas, Grimaud, Laurence, Ramozzi, Romain, El Kaim, Laurent   +4 more
core   +1 more source

Direct Preparation of Unsymmetrical Difunctionalized Cyclen Derivatives by an Ugi Multicomponent Reaction

, 2016
The paper describes a new, high hild and efficient synthetic protocol for the preparation of unsymmetrical difunctionalized cyclen and its close derivatives using a modified Ugi reaction (N-split Ugi) is described.
Mauro Formica (1813765), Giovanni Piersanti (1632979), Vieri Fusi (1813759), Giovanni Zappia (2397997), Francesco Remi (2398000), Luca Giorgi (1813747)   +5 more
core   +2 more sources

α-Ketoglutaric acid in Ugi reactions and Ugi/aza-Wittig tandem reactions

Beilstein Journal of Organic Chemistry
A small library of bis- and tetraamides was synthesized by the Ugi reaction with α-ketoglutaric acid, tert -butyl isocyanide, aromatic aldehydes, and aromatic amines. When o -azidoanilines were used, azidated peptidomimetics were obtained, the post ...
Vladyslav O Honcharov, Yana I Sakhno, Olena H Shvets, Vyacheslav E Saraev, Svitlana V Shishkina, Tetyana V Shcherbakova, Valentyn A Chebanov   +6 more
openaire   +2 more sources