A highly selective Bi(OTf)3 mediated fragmentation-contraction of δ-ortholactones. A facile route to functionalized γ-lactones
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DOI: 10.1016/j.tet.2018.04.055
Abstract: Abstract A very selective method for the formation of γ-lactones from pyranyl ortholactones has been developed which occurs via a fragmentation-acetate migration-ring contraction process. The reaction is very functional group tolerant, providing functionalized γ-lactones as… read more here.
Keywords: selective otf; highly selective; otf mediated; functionalized lactones ... See more keywords
(CH3)2CuLi/Cu(OTf)2 Mediated N- or O-Cyclization of Urea-Tethered Cyclobuta[ b]indolines.
Sign Up to like & getrecommendations! Published in 2019 at "Organic letters"
DOI: 10.1021/acs.orglett.8b03565
Abstract: A (CH3)2CuLi/Cu(OTf)2 mediated N- or O-cyclization of urea-tethered cyclobuta[ b]indolines has been reported in this paper, giving a new synthetic protocol for the construction of pyrimido[1,6- a]indolone and cyclic imidate derivatives in moderate to good… read more here.
Keywords: 2culi otf; ch3 2culi; otf mediated; mediated cyclization ... See more keywords
Cu(OTf)2-mediated C(sp2)–H arylsulfonylation of enamides via the insertion of sulfur dioxide
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DOI: 10.1039/c8qo01144c
Abstract: A stereoselective Cu(OTf)2-mediated C(sp2)–H sulfonylation of enamides with arylsulfonyl radicals generated in situ from DABSO and diazonium salts is developed. read more here.
Keywords: mediated sp2; via insertion; enamides via; otf mediated ... See more keywords
A three-component, Zn(OTf)2-mediated entry into trisubstituted 2-aminoimidazoles
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DOI: 10.3762/bjoc.15.103
Abstract: A three-component reaction involving in situ generation of propargylureas and subsequent Zn(OTf)2-mediated cyclocondensation with a primary amine yielded trisubstituted 2-aminoimidazoles. These findings are in contrast to the previously reported base-promoted unimolecular cyclization of propargylureas (leading… read more here.
Keywords: otf mediated; trisubstituted aminoimidazoles; component otf; three component ... See more keywords