Results 81 to 90 of about 17,975 (276)
Reactivity of three-membered heterocyclic rings with respect to sodium methoxide [PDF]
, 2011 Aziridines can be ‘activated’ or ‘non-activated’, depending on whether their N-substituent is an electron-withdrawing group or an electron-donating group, respectively.
Catak, Saron +5 more
core
European Journal of Organic Chemistry, EarlyView.1,1‐Disubstituted vinylbromides are key intermediates for constructing nitrogen‐containing heterocycles. This review provides an overview of the synthetic applications of 1,1‐disubstituted vinylbromides and summarizes recent developments in reaction methodologies, mechanistic insights, and the structural diversity of N‐heterocyclic compounds accessible
Anne Westermeyer +6 more
wiley +1 more source
Molecules, 2019 Small ring heterocycles, such as epoxides and aziridines, are present in several natural products and are also highly versatile building blocks, frequently involved in the synthesis of numerous bioactive products and pharmaceuticals.
Allan Ribeiro da Silva +3 more
doaj +1 more source
Development of a Novel Epoxide-Containing Trimethylenemethane Precursor for Palladium-Catalyzed Cycloadditions [PDF]
, 2019 Pd(0)-catalyzed trimethylenemethane (TMM) cycloaddition reactions have been used extensively to generate disubstituted 5-membered rings with high levels of regioselectivity, chemoselectivity, and stereoselectivity.
Paterson, Mara
core +2 more sources
Trispyrazolylborate Ligands Supported on Vinyl Addition Polynorbornenes and Their Copper Derivatives as Recyclable Catalysts [PDF]
, 2019 Polynorbornenes prepared by vinyl addition poly- merization and bearing pendant alkenyl groups serve as skeletons to support trispyrazolylborate ligands (Tpx) built at those alkenyl sites.
Albéniz Jiménez, Ana Carmen +6 more
core +2 more sources
A Practical and Flexible De Novo Synthesis of Deoxygenated Carbasugars and Their Cyclitol Epoxides
European Journal of Organic Chemistry, EarlyView.A de novo synthesis route comprising enantioselective Brown crotylation and ring‐closing metathesis as the key steps enables the synthesis of a‐ and b‐carba‐paratose, a‐ and b‐carba‐colitose as well as four configurational deoxycyclophellitol isosteres.
Yevhenii Radchenko +4 more
wiley +1 more source
Assemblies of aziridinemethanols [PDF]
, 2001 Contains fulltext : 14060.pdf (publisher's version ) (Open ...
Buijnsters, P.J.J.A. +8 more
core +2 more sources
1,2‐Diazetidines − Structure, Synthesis, and Functionalization
European Journal of Organic Chemistry, EarlyView.1,2‐Diazetidines are saturated four‐membered heterocycles featuring two adjacent nitrogen atoms. Despite recent advances in their synthesis and promising potential in medicinal chemistry, the chemistry of these cyclic hydrazines remains underexplored.
Stefan Roesner
wiley +1 more source
Terminal Aziridines by α-Deprotonation/Electrophile Trapping of N-Protected Aziridine
Organic Letters, 2008 N-tert-Butylsulfonyl and N-tert-butylsulfinyl aziridine undergo alpha-lithiation/electrophile trapping providing a new entry to terminal aziridines. With N-tert-butylsulfinyl aziridine complete asymmetric induction is observed alpha to nitrogen.
Hodgson, D +3 more
openaire +2 more sources
Recent Studies of (+)-3-Carene Transformations with the Retention of the Native Framework
Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2019 This review presents last decade and some past especially relevant studies in the field of (+)-3-carene synthetic transformations. This paper discusses exclusively the transformations of (+)-3-carene, proceeding with the retention of the native bicyclic ...
Serghei Curlat
doaj +1 more source