Results 1 to 10 of about 7,230 (159)

Catalytic Three‐Component Ugi Reaction [PDF]

Angewandte Chemie - International Edition, 2008
Perfect atom economy characterizes a novel catalytic three‐component Ugi reaction (see example). Different α‐amino amides are formed in good yields from aldehydes, primary amines, and isocyanides in the presence of phenyl phosphinic acid as the catalyst. The products will be useful for the synthesis of α‐amino acid derivatives and in diversity‐oriented
Subhas Chandra Pan, Benjamin List
exaly   +4 more sources

Ugi Four-Component Reactions Using Alternative Reactants

Molecules, 2023
The Ugi four-component reaction (Ugi-4CR) undoubtedly is the most prominent multicomponent reaction (MCRs) that has sparked organic chemists’ interest in the field.
Seyyed Emad Hooshmand, Wei Zhang
exaly   +3 more sources

Upper gastrointestinal symptoms and Gulf War Illness in a clinical cohort of US veterans: a retrospective, cross-sectional study [PDF]

BMJ Open Gastroenterology
Objective Approximately 30% of the 700 000 US Gulf War Veterans (GWVs) report symptoms collectively termed Gulf War Illness (GWI), a multisymptom illness of uncertain pathophysiology.
Abdelrahman Yousef, Sarah T Ahmed, Theresa H Nguyen Wenker, Alice B S Nono-Djotsa, Stephen H Boyle, Elizabeth J Gifford, Deeksha Malhotra, Helena Chandler, Sandhya Bandi, Drew A Helmer   +9 more
doaj   +2 more sources

Context-Specific, User-Centred: Designing Urban Green Infrastructure to Effectively Mitigate Urban Density and Heat Stress

Urban Planning, 2021
Green infrastructure plays a vital role for cities facing the challenges of urbanisation and climate change. It has the potential to mitigate the adverse effects of urban density and the heat island effect, enhancing the ecological and social resilience ...
Julia Mittermüller, Sabrina Erlwein, Amelie Bauer, Tatjana Trokai, Sophie Duschinger, Michael Schönemann   +5 more
doaj   +1 more source

Informe de la Conferencia Temática UGI - IGU “Las Geografías de la Paz”, Bolivia 2017

Espiral, 2021
La geografía generalmente ha sido acusada de ser útil sobre todo para hacer la guerra. Por el contrario, puede ofrecer una amplia gama de contribuciones a la construcción de la paz y la solución de conflictos socioterritoriales de diversas escalas ...
Juan Manuel Delgado Estrada
doaj   +1 more source

Epidemiological and endoscopic profile of patients with upper gastrointestinal bleeding at a tertiary care center in Northern India : A retrospective analysis of twenty years

Asian Journal of Medical Sciences, 2023
Background: Upper gastrointestinal (UGI) bleed is a common emergency presenting to emergency departments all over the world. Since the spectrum of UGI bleeding varies from region to region, it is important to know the profile of UGI bleed for proper ...
Shabir A Shiekh , Waseem Raja, Majid Khalil , Bilal A Khan , Showkat A Kadla   +4 more
doaj   +1 more source

Risk factors for early and late morbidity in patients with cardiovascular disease undergoing inguinal hernia repair with a tailored approach: a single-center cohort study

BMC Surgery, 2023
Background Inguinal hernia repair is a common procedure in surgery. Patients with cardiovascular disease have an increased operative risk for postoperative morbidity.
Kamran Hajili, Alberto Vega Hernandez, Jakob Otten, Dana Richards, Claudia Rudroff   +4 more
doaj   +1 more source

‘Atypical Ugi’ tetrazoles

Chemical Communications, 2020
We surprisingly found that combining the substrates of Ugi tetrazole reaction gives two different constitutional isomeric Ugi products A and B. A is the expected classical Ugi products whereas B is an isomeric product (‘atypical Ugi’).
Eman M. M. Abdelraheem, Imogen Goodwin, Shabnam Shaabani, Michel P. de Haan, Katarzyna Kurpiewska, Justyna Kalinowska-Tłuścik, Alexander Dömling   +6 more
openaire   +5 more sources

Cost-effectiveness of adding a Helicobacter pylori antibody test to the upper gastrointestinal series in gastric cancer screening at the workplace

Environmental and Occupational Health Practice, 2023
Objective: Helicobacter pylori infections increase gastric cancer risk. Detecting and eradicating Helicobacter pylori infections and implementing a follow-up strategy should be considered by occupational health practitioners. This study aimed to evaluate
Motoko Nakatani, Sachie Inoue, Isao Kamae   +2 more
doaj   +1 more source

Propargyl Amines: Versatile Building Blocks in Post‐Ugi Transformations

ChemistryOpen, 2023
The Ugi reaction, a multicomponent reaction, allows diversity‐oriented synthesis Its importance is recognized by an exponential increase in the publications utilizing the post‐Ugi transformations as a strategy to build complex molecules via simple and ...
Rinkal B. Bhoraniya, Dr. Sachin G. Modha
doaj   +1 more source