Results 21 to 30 of about 14,737 (217)
, 2019 A concise synthesis of quinoline-fused eight-membered rings from simple starting materials is described. Reductive cyclo-carbopalladation of suitable Ugi-4CR substrates as a key step leads to the regio- and diastereoselective formation of 1,2 ...
Frank Rominger (63178) +3 more
core +2 more sources
How commonly is upper gastrointestinal cancer missed at endoscopy? A meta-analysis
Endoscopy International Open, 2014 Background and study aims: Upper gastrointestinal (UGI) cancer in the Western world usually presents at an advanced stage, when opportunities for curative therapy are limited.
Shyam Menon, Nigel Trudgill
doaj +1 more source
Beilstein Journal of Organic Chemistry, 2020 In this report, we introduce a new strategy for controlling the stereochemistry in Ugi adducts. Instead of controlling stereochemistry directly during the Ugi reaction we have attempted to stereodefine the chiral center at the peptidyl position through ...
Yuqing Wang +9 more
doaj +1 more source
Urban Green Infrastructure for Poverty Alleviation: Evidence Synthesis and Conceptual Considerations
Frontiers in Sustainable Cities, 2021 The multiple benefits of urban green infrastructure (UGI) that support sustainable cities are increasingly acknowledged, and yet the bulk of research over the past decade or so has focused on only a small subset of the numerous benefits, notably ...
Charlie M. Shackleton
doaj +1 more source
Novel postmodifications of the Ugi reaction [PDF]
, 2016 In dieser Arbeit wurden neuartige Postmodifikationen von Produkten der Ugi-4CR untersucht. Ihre Möglichkeiten und Grenzen wurden durch das Permutieren der notwendigen funktionellen Gruppen um das Ugi-Grundgerüst herum und durch Synthese von ...
Welsch, Sebastian
core +1 more source
Scientific Reports, 2022 The reasonable layout of green infrastructure is conducive to the low-carbon, livable and high-quality sustainable development of cities. The framework of spatio-temporal evolution characteristics and prediction analysis of Urban Green Infrastructure ...
Yin Ma +5 more
doaj +1 more source
Macrocyclization of ω‐Isocyano Aldehydes
Angewandte Chemie, EarlyView.The ω‐isocyano aldehydes readily undergo cyclization to afford α‐acyloxy, α‐hydroxy, α‐acetamido, and α‐keto macrolactams, as well as tetrazole‐fused macrocycles, via C(sp3)─C(sp2) bond formation, providing access to diverse α‐functionalized medium‐sized lactams and macrolactams. ABSTRACT Medium‐sized rings and macrocycles constitute a privileged class
Baochao Yang +4 more
wiley +2 more sources
Remote Sensing, 2021 Urban green infrastructures (UGI) can effectively reduce surface runoff, thereby alleviating the pressure of urban waterlogging. Due to the shortage of land resources in metropolitan areas, it is necessary to understand how to utilize the limited UGI ...
Qifei Zhang, Zhifeng Wu, Paolo Tarolli
doaj +1 more source
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 +2 more
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Reflection of Religious Value in The Poem of Prayist
Al-Qalam, 2018 In Buginese society Elong ugi means song. In literature, elong ugi is a kind of poetry that has similarity to poem and traditional poetry. Elong ugi is an effective medium to express feeling and thought.
Abdul Asis
doaj +1 more source