Results 101 to 110 of about 25,436 (256)
Recent Applications of Quinolinium Salts in the Synthesis of Annulated Heterocycles
SynOpen, 2022 Quinoline derivatives are frequently found in natural products and biologically active compounds; however, construction of quinoline fused polyheterocycles is a challenging goal in synthetic organic chemistry.
Suven Das
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Advanced Synthesis &Catalysis, Volume 367, Issue 6, March 18, 2025.Abstract The synthesis of architecturally complex polyheterocyclic structures embedding the indole ring represents a growing field of interest. Carbolines and their partially dehydro derivatives, pyrazinoindoles, indoloindoles, azepinoindoles and other medium‐sized derivatives are only some examples of indole‐containing polycyclic compounds featured by
Alessandro Palmieri, Marino Petrini
wiley +1 more source
New Chemistry of Imidazolinium ylides [PDF]
, 2001 Previous work in this group has shown 4,5-dihydroimidazolium ylides, formed by N- alkylation of 4,5-dihydroimidazoles, to undergo 1,3-dipolar cycloadditions with a range of dipolarophiles in a highly regio- and stereoselective fashion.
Lory, Pedro M. J.
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Pyrrolodiazines. 4. Structure and chemistry of 3,4-dihydropyrrolo[1,2-a]pyrazine [PDF]
, 1997 The structure of 3,4-dihydropyrrolo[1,2-a]pyrazine and its N-protonated form is studied by ab initio calculations. Examples of the reactivity of this poorly studied system are presented in which it is shown that the imino moiety does not react with ...
Andrés, José L. de +6 more
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Chemistry – A European Journal, Volume 31, Issue 9, February 12, 2025.We report a Sc(OTf)3‐catalyzed cycloaddition of highly strained bicyclo[1.1.0]butane carboxylates with protected aziridines. In this transformation, highly functionalized 2‐azabiyclo[3.1.1]heptanes are accessed in single step under mild conditions. This is an example of strain‐release driven transformation, where two highly strained rings combine to ...
Malini George +4 more
wiley +1 more source
Catalytic asymmetric synthesis of highly substituted pyrrolizidines [PDF]
, 2012 A catalytic asymmetric double (1,3)-dipolar cycloaddition reaction has been developed. Using a chiral silver catalyst, enantioenriched pyrrolizidines can be prepared in one flask from inexpensive, commercially available starting materials.
Codelli, Julian A. +2 more
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A Simple Method for Anchoring Silver and Copper Nanoparticles on Single Wall Carbon Nanotubes
Nanomaterials, 2019 Single walled carbon nanotubes (SWCNT) were functionalized using the 1,3-dipolar cycloaddition reaction of an azomethine ylide under solvent-free conditions, a one-pot procedure that yields pyrrolidine type of groups at the nanotubes surface.
Mariana M. Silva +5 more
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Stereoselective cyclo-addition reactions of azomethine ylides catalysed by in situ generated Ag(I)/bisphosphine complexes [PDF]
, 2010 Stereoselective cyclo-addition reactions of azomethine ylides promoted by in situ generated Ag(I)/bisphosphine complexes were studied. Under the optimised conditions, the pyrrolidine products were isolated in up to 84 % yield and with up to 71 % e.e. The
RONALD GRIGG +2 more
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Synthesis of the tricyclic core of manzamine A [PDF]
, 2015 An efficient synthetic approach to the core structure of the manzamine alkaloids is reported, particularly in relation to incorporating a one-carbon unit in ring B from which the aldehyde in ircinal A or the beta-carboline unit in manzamine A could ...
Ageel, K.A. +6 more
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Journal of King Saud University: Science, 2020 An efficient, eco-friendly and sustainable approach for the synthesis of novel spiroindeno[1,2-b]quinoxaline-3-phenylspiro[4,3″]benzylidenepiperidone ring system has been developed by a one-pot four component [3 + 2] cycloaddition strategy.
Abdulrahman I. Almansour +2 more
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