Results 31 to 40 of about 14,737 (217)
Diverse Isoquinoline Scaffolds by Ugi/Pomeranz–Fritsch and Ugi/Schlittler–Müller Reactions [PDF]
Organic Letters, 2019 Abstract The Pomeranz–Fritsch reaction and its Schlittler–Müller modification were successfully applied in the Ugi postcyclization strategy by using orthogonally protected aminoacetaldehyde diethyl acetal and complementary electron rich building blocks.
Yuanze Wang +4 more
openaire +3 more sources
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
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 +5 more
doaj +1 more source
, 2003 Uracil, a promutagenic base, appears in DNA either by deamination of cytosine or by incorporation of dUMP by DNA polymerases. This unconventional base in DNA is removed by uracil-DNA glycosylase (UDG).
Acharya, Narottam +2 more
core +2 more sources
, 2016 Ugi four-component condensation (Ugi-4CC) between 2-formylbenzoic acid, phenacylamine dimethyl acetal, and isocyanides afforded 1H-isochromen-1-ones (isocoumarins).
Gloria Menchi (1651774) +3 more
core +2 more sources
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 +6 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
Ecological IndicatorsUrban green infrastructure (UGI) that provides diverse ecosystem services are crucial components of a city. Achieving appropriate density and equitable distribution of UGI is highly significant for urban planning to ensure sustainable and high-quality ...
Wei Hou, Xinpeng Li
doaj +1 more source
Endoscopic features of cytomegalovirus disease of the upper gastrointestinal tract between transplant and non-transplant patients [PDF]
The Korean Journal of Internal MedicineBackground/Aims Cytomegalovirus (CMV) disease in the upper gastrointestinal (UGI) tract frequently occurs in immunocompromised patients. However, data regarding UGI CMV disease in non-transplant patients compared with those in transplant recipients are ...
Yuri Kim +10 more
doaj +1 more source
Hydrazine in the Ugi Tetrazole Reaction [PDF]
Synthesis, 2016 We describe the hitherto unknown use of N-Boc-protected hydrazine in the Ugi tetrazole reaction to access a library of highly substituted 5-(hydrazinomethyl)-1-methyl-1H-tetrazoles. The reaction is very versatile and good to high yielding. A one-pot, two-step procedure is given.
Patil +5 more
openaire +3 more sources