01414nas a2200169   4500008004100000022001400041245015600055210006900211260000800280300001200288490000700300520073800307100002701045700002401072700002601096856012201122       2018                        eng d  a1477-052000aEosin Y photoredox catalyzed net redox neutral reaction for regiospecific annulation to 3-sulfonylindoles via anion oxidation of sodium sulfinate salts0 aEosin Y photoredox catalyzed net redox neutral reaction for regi  cJAN  a536-5400 v163 a<p>An eosin Y photoredox catalyzed net redox neutral process for 3-sulfonylindoles via the anionic oxidation of sodium sulfinate salts and its radical cascade cyclization with 2-alkynyl-azidoarenes was developed with visible light as a mediator. The reaction offers metal and oxidant/reductant free, visible light mediated vicinal sulfonamination of alkynes to 2-aryl/alkyl-3-sulfonylindoles and proceeds via the generation of a sulfur-centered radical through direct oxidation of the sulfinate anion by an excited photocatalyst with a reductive quenching cycle. The mild conditions, use of an organic dye as photo-catalyst, bench stability and easily accessible starting materials make the present approach green and attractive.</p>1 aRohokale, Rajendra, S.1 aTambe, Shrikant, D.1 aKshirsagar, Umesh, A.  uhttps://library.ncl.res.in/content/eosin-y-photoredox-catalyzed-net-redox-neutral-reaction-regiospecific-annulation-301272nas a2200157   4500008004100000245014100041210006900182260000800251300001500259520061400274100002400888700002300912700002700935700002600962856012600988       2018                        eng d00aMetal-free synthesis of 3-thiocyanatobenzothiophenes by eosin Y photoredox-catalyzed cascade radical annulation of 2-alkynylthioanisoles0 aMetalfree synthesis of 3thiocyanatobenzothiophenes by eosin Y ph  cSEP  a 4867-48733 a<p>A convenient, efficient, metal-free synthesis of 3-thiocyanatobenzothiophenes has been developed that uses eosin Y in a visible-light-mediated photoredox-catalyzed anion oxidation of the ammonium salt of thiocyanate and proceeds through the cascade radical annulation of 2-alkynylthioanisole at room temperature. The present protocol requires visible light as a green energy source, an organic dye as the photocatalyst, and oxygen as a green oxidant to provide a mild route with a broad substrate scope for the formation of potentially bioactive 3-substituted benzothiophene derivatives in good yields.</p>1 aTambe, Shrikant, D.1 aJadhav, Mahesh, S.1 aRohokale, Rajendra, S.1 aKshirsagar, Umesh, A.  uhttps://library.ncl.res.in/content/metal-free-synthesis-3-thiocyanatobenzothiophenes-eosin-y-photoredox-catalyzed-cascade01278nas a2200145   4500008004100000245016200041210006900203260000800272300001400280520063200294100002400926700002700950700002600977856012901003       2018                        eng d00aVisible-light-mediated eosin Y photoredox-catalyzed vicinal thioamination of alkynes: radical cascade annulation strategy for 2-substituted-3-sulfenylindoles0 aVisiblelightmediated eosin Y photoredoxcatalyzed vicinal thioami  cMAY  a2117-21213 aAn organic dye photoredox-catalyzed regiospecific radical cascade annulation strategy of 2-alkynyl-azidoarenes to generate 3-sulfenylindoles via vicinal thioamination of alkynes at room temperature, mediated by visible light, was developed. The method requires mild conditions, including visible light as a traceless green energy source, room temperature, eosin Y organic dye as a photoredox catalyst, ambient air as oxidant, and easily available starting materials to provide a green, efficient, metal- and strong-oxidant-free synthesis of 3-sulfenylindoles with broad substrate scope through vicinal thioamination of alkynes.1 aTambe, Shrikant, D.1 aRohokale, Rajendra, S.1 aKshirsagar, Umesh, A.  uhttps://library.ncl.res.in/content/visible-light-mediated-eosin-y-photoredox-catalyzed-vicinal-thioamination-alkynes-radical