Results 31 to 40 of about 38,024 (237)

Synthesis of beta-lactam peptidomimetics through Ugi MCR: first application of chiral N-beta-Fmoc amino alkyl isonitriles in MCRs [PDF]

, 2011
Chiral N-beta-Fmoc amino alkyl isonitriles were employed in Ugi multi component reactions (Ugi 4C-3CR) to obtain functionalized beta-lactam peptidomimetics with L-aspartic acid alpha-methyl ester/peptide ester and organic aldehydes.
Narendra, N., Sureshbabu, V.V., Vishwanatha, T.M.   +2 more
core   +2 more sources

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
Pan, S., List, B.
openaire   +3 more sources

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

Morphology of the Esophageal Hiatus: Is It Different in 3 Types of Hiatus Hernias? [PDF]

, 2020
Background/aimsThe esophageal hiatus is formed by the right crus of the diaphragm in the majority of subjects. Contraction of the hiatus exerts a sphincter-like action on the lower esophageal sphincter (LES). The aim is to study the hiatal anatomy (using
Ghahremani, Gary, Horgan, Santiago, Kumar, Dushyant, Kunkel, David C, Mittal, Ravinder K, Zifan, Ali   +5 more
core   +1 more source

On the Landscape Activity Measure Coupling Ecological Index and Public Vitality Index of UGI: The Case Study of Zhongshan, China

Land, 2022
In the context of high-quality urban development and the increasingly important role of urban green infrastructure (UGI) in public life, landscape activity (LA) has gradually become a dominant indicator for improving UGI quality and efficiency, as well ...
Xueling Zhang, Ruoxuan Huang, Yixuan Yang   +2 more
doaj   +1 more source

Upper gastrointestinal bleeding in patients with stable coronary artery disease (registry of antithrombotic therapy “REGATТA” results)

Терапевтический архив, 2020
Introduction.Upper gastrointestinal (UGI) bleeding is a common complication of antiplatelet therapy. Data from real clinical practice that characterize the range of risk factors for UGI bleeding, prophylactic proton pump inhibitors (PPIs) therapy ...
O. O. Shakhmatova, A. L. Komarov, V. V. Korobkova, E. B. Yarovaya, M. V. Andreevskaya, A. G. Shuleshova, E. P. Panchenko   +6 more
doaj   +1 more source

The Association Between Family History of Upper Gastrointestinal Cancer and the Risk of Death from Upper Gastrointestinal Cancer–based on Linxian Dysplasia Nutrition Intervention Trial (NIT) Cohort

Frontiers in Oncology, 2022
ObjectiveExplore the influence of family history of upper gastrointestinal (UGI) cancer on UGI cancer death, based on the Linxian Dysplasia Nutrition Intervention Trial (NIT) cohort.MethodsFamily history of UGI cancer was defined as at least one first ...
Wan-yi Sun, Huan Yang, Xiao-kun Wang, Jin-hu Fan, You-lin Qiao, Philip R. Taylor   +5 more
doaj   +1 more source

Entrevista al Dr. Marcelo Lopes de Souza: “Los desafíos contemporáneos ofrecen a la Geografía una oportunidad única para demostrar su relevancia social”

Espiral, 2020
Marcelo Lopes de Souza es bacharel y mestre en Geografía por la Universidad Federal de Rio de Janeiro. Realizó su doctorado en Geografía en la Universität Tübingen (Alemania) y ha sido invitado como profesor en diferentes universidades de Europa y ...
Victor A. Huaytalla L.
doaj   +1 more source

Urban Green Infrastructure in Jordan: A Perceptive of Hurdles and Challenges

Journal of Sustainable Real Estate, 2022
Jordanians live in compact cities with limited green spaces causing several environmental problems that deteriorate the urban quality of life.
Zayed F. Zeadat
doaj   +1 more source

The effectiveness of urban green infrastructure in reducing surface urban heat island

Ain Shams Engineering Journal, 2022
In the era of the devastating impacts of climate change, many cities around the world make strenuous efforts to find suitable and sustainable adaptation strategies to address the climatic dangers.
Maryam F. Abdulateef, Hoda A. S. Al-Alwan   +1 more
doaj   +1 more source