Rhodium-Catalyzed Enantioselective Synthesis of Oxazinones via an Asymmetric Ring Opening-Lactonization Cascade of Oxabicyclic Alkenes.
Sign Up to like & getrecommendations! Published in 2019 at "Organic letters"
DOI: 10.1021/acs.orglett.9b02819
Abstract: The rhodium-catalyzed asymmetric ring opening reaction of oxabicyclic alkenes is shown to be an efficient method for synthesizing chiral heterocycles. We demonstrate that the pairwise combination of chiral catalyst with chiral amino-acid-derived pronucleophiles results in… read more here.
Keywords: ring opening; rhodium catalyzed; asymmetric ring; oxabicyclic alkenes ... See more keywords
Palladium/silver co-catalyzed syn-stereoselective asymmetric ring-opening reactions of azabenzonorbornadienes with amides
Sign Up to like & getrecommendations! Published in 2019 at "Organic Chemistry Frontiers"
DOI: 10.1039/c9qo00041k
Abstract: The first syn-stereoselective generation of 1,2-diamino dihydronaphthalene derivatives by asymmetric ring-opening reaction of azabenzonorbornadienes is reported. read more here.
Keywords: ring opening; catalyzed syn; silver catalyzed; syn stereoselective ... See more keywords
Asymmetric ring-opening reactions of donor–acceptor cyclopropanes with 1,3-cyclodiones
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DOI: 10.1039/d2ra08257h
Abstract: Asymmetric ring-opening reactions of donor–acceptor cyclopropanes with 1,3-cyclodiones have been established for the synthesis of enantioenriched γ-hydroxybutyric acid derivatives in the presence of Cu(ii)/trisoxazoline catalyst. These reactions offered the desired products in 70% to 93%… read more here.
Keywords: acceptor cyclopropanes; opening reactions; donor acceptor; ring opening ... See more keywords
Highly sensitive biosensor based on an all-dielectric asymmetric ring metasurface.
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DOI: 10.1364/ao.450739
Abstract: We propose an all-dielectric asymmetric ring-cylindrical metasurface. Based on the analysis of transmission characteristics and the calculation of electromagnetic field distribution of the metasurface with this element structure, it is found that the high Q… read more here.
Keywords: dielectric asymmetric; biosensor based; sensitive biosensor; highly sensitive ... See more keywords