A mild and facile method to access sulfenylated dihydrochromenones via a visible light mediated thiol-yne/conjugate addition cascade of alkyne-tethered cyclohexadienones, using cheap and readily available organic photoredox catalyst (Eosin Y) is demonstrated. The utility and sustainability of the protocol were further justified by the high yields, excellent diastereoselectivities, broad substrate scope, gram scale synthesis, green chemistry metrics (atom economy and efficiency) and further synthetic transformations of the products.

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Photocatalytically generated sulfenyl radicals were coupled with arylsulfonyl radicals at room temperature for accessing unsymmetrical organic thiosulfonates.

We hereby report a Ru(II)-catalyzed C(sp2)-H allenylation of N-tosylbenzamides to access multi-substituted allenylamides. Furthermore, the allenylamides were converted to the corresponding isoquinolone derivatives via base mediated annulation. The current protocol...

A metal-free oxidative cascade acylation and dearomatization of N-(p-methoxyaryl)propiolamides was achieved via K2S2O8 mediated decarboxylation of -oxocarboxylic acids under operationally simple conditions to access azaspiro[4,5]-trienones in good to excellent yields....