Photo-promoted mild tandem 6-exo-trig spirocyclization of biaryl ynones with ammonium thiocyanate has been developed to access thiocyanate-containing spiro[5,5]trienones with good yields and regioselectivity. Meanwhile, other thiocyanate-substituted cycles also could be...

Photoinduced radical cascade cyclization of aryl acetylenes with NH4SCN has been finished, which provides a simple and mild protocol for the synthesis of SCN-containing dibenzazepines or dioxodibenzothiazepines. A variety of...

Photoinduced tandem cyclization of alkynes with phenylsulfinic acids has been accomplished, which gives a mild strategy for the preparation of sulfone-substituted seven-membered N-heterocycles. A variety of scaled-up experiments, further trans-formations, and mechanistic studies were also operated in the follow-up work.