Alkyltriflate-Triggered Annulation of Aryl­isothio­cyanates and Alkynes Leading to Multiply Substituted Quinolines through Domino Electrophilic Activation

The
reaction of arylisothiocyanate, alkyltriflate, and alkynes
leads to variously substituted quinolines in high yields. The reaction
undergoes alkyltriflate-triggered domino electrophilic activation
and avoids the use of a transition-metal catalyst. A variety of functional
groups are tolerated in the quinoline ring.