01272nas 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-cascade