Stereoselective Synthesis of Highly Substituted O-Heterocycles via Matteson Homologation: A Ring-Closing Metathesis Approach.
Sign Up to like & getrecommendations! Published in 2023 at "Organic letters"
DOI: 10.1021/acs.orglett.3c01099
Abstract: Matteson homologations of chiral boronic esters with the aid of unsaturated nucleophiles are powerful for gaining access to a range of different O-heterocycles via subsequent ring-closing metatheses. Using this protocol, six- to eight-membered rings become… read more here.
Keywords: synthesis highly; heterocycles via; stereoselective synthesis; matteson ... See more keywords
Preparation of Heterocycles via Visible-Light-Driven Aerobic Selenation of Olefins with Diselenides.
Sign Up to like & getrecommendations! Published in 2019 at "Organic letters"
DOI: 10.1021/acs.orglett.8b03738
Abstract: The aerobic dehydrogenative cyclization of alkenes with easily accessible diselenides facilitated by visible light is reported. Notably, the features of this transition-metal-free protocol are pronounced efficiency and practicality, good functional group tolerance, atom economy, and… read more here.
Keywords: driven aerobic; visible light; heterocycles via; light driven ... See more keywords
Site-selective deuteration of N-heterocycles via iridium-catalyzed hydrogen isotope exchange
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DOI: 10.1021/acscatal.7b02682
Abstract: The application of iridium(I) NHC/phosphine catalysts has delivered highly selective deuteration of indole, azaindole, and pyrrole N-heterocycles, which represent an important and relatively underexplored class of labeling substrates. Common N-protecting groups have been used to… read more here.
Keywords: selective deuteration; site selective; iridium; deuteration heterocycles ... See more keywords
Selective Synthesis of Bis-Heterocycles via Mono- and Di-Selenylation of Pyrazoles and Other Heteroarenes
Sign Up to like & getrecommendations! Published in 2022 at "ACS Omega"
DOI: 10.1021/acsomega.2c00323
Abstract: The insertion of selenium was achieved in the form of mono-selenides and di-selenides for the preparation of novel bis-heterocyclic compounds. This method is more general and provides scaffold diversity with high yields of products. The… read more here.
Keywords: heterocycles via; bis heterocycles; selective synthesis; selenylation ... See more keywords
Synthesis of chiral polycyclic N-heterocycles via gold(I)-catalyzed 1,6-enyne cyclization/intramolecular nucleophilic addition.
Sign Up to like & getrecommendations! Published in 2022 at "Chemical communications"
DOI: 10.1039/d1cc06388j
Abstract: Cycloisomerization of N-tethered indole- and dihydropyrrole-arylpropargyl substrates into complex polycycles was investigated by using gold(I) catalysis. Enantioselectivities up to 93% ee were obtained in the asymmetric version of this process. DFT calculations rationalized the reactivity… read more here.
Keywords: heterocycles via; polycyclic heterocycles; synthesis chiral; chiral polycyclic ... See more keywords
π-Extension of heterocycles via a Pd-catalyzed heterocyclic aryne annulation: π-extended donors for TADF emitters
Sign Up to like & getrecommendations! Published in 2022 at "Chemical Science"
DOI: 10.1039/d2sc01788a
Abstract: We report the annulation of heterocyclic building blocks to access π-extended polycyclic aromatic hydrocarbons (PAHs). The method involves the trapping of short-lived hetarynes with catalytically-generated biaryl palladium intermediates and allows for the concise appendage of… read more here.
Keywords: extension heterocycles; heterocycles via; catalyzed heterocyclic; via catalyzed ... See more keywords
Metal-Free Synthesis of N-Heterocycles via Intramolecular Electrochemical C-H Aminations
Sign Up to like & getrecommendations! Published in 2022 at "Frontiers in Chemistry"
DOI: 10.3389/fchem.2022.950635
Abstract: N-heterocycles are key structural units in many drugs, biologically interesting molecules and functional materials. To avoid the residues of metal catalysts, the construction of N-heterocycles under metal-free conditions has attracted much research attention in academia… read more here.
Keywords: intramolecular electrochemical; heterocycles via; metal free; electrochemical aminations ... See more keywords