نتایج جستجو برای: ugi four component
تعداد نتایج: 1200492 فیلتر نتایج به سال:
The aim of the presented research was to analyze ceramic material based on cordierite as a function activation time and sintering temperature. Three-component oxide mixture prepared (MgO + Al2O3 SiO2 in ratio 2:2:5). To decrease temperature, 10 mass % Bi2O3 added this mixture. mixtures were mechanically activated for 5 240 minutes ball mill. Activated sintered at temperatures 1173-1573K. XRD me...
Urban built-up areas confront significant environmental challenges and growing demand for enhanced residents’ well-being. Prioritizing urban green infrastructure (UGI) interventions is crucial sustainable renewal. We propose a six-step framework that integrates urgency, synergy, feasibility, typology to identify UGI intervention priorities. The targets detailed planning units (DPUs) was applied...
OBJECTIVE The objective of this study was to evaluate the results of the National Cancer Screening Programme (NCSP) for gastric cancer in 2009 and provide the rates of participation in organized gastric cancer screening in Korea. METHODS The data were obtained from the National Cancer Screening Information System, and the participation rates in gastric cancer screening were calculated. Recall...
BACKGROUND, AIMS According to Porto Criteria upper gastrointestinal (UGI) endoscopy is recommended in patients with suspected inflammatory bowel disease (IBD). Nevertheless, previous studies revealed frequent involvement of UGI tract even in patients with ulcerative colitis (UC). The aim of the present study was to determine the diagnostic role of esophagogastroduodenoscopy (EGD) and assess the...
A regioselective approach for the synthesis of pyrrolopyridinones and pyrroloazepinones is reported employing an Ugi reaction followed by a gold(I) or platinum(II) catalyzed intramolecular hydroarylation.
A short sequential synthesis of pyrrolidino- pyridines and pyrimidines illustrates the potential of combining Ugi-Smiles couplings with radical tin-free processes.
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