Tandem trifluoromethylthiolation and cyclization of N-aryl-3-butenamides with AgSCF3: divergent access to CF3S-substituted 3,4-dihydroquinolin-2-ones and azaspiro[4,5]dienones

A AgSCF 3 -mediated tandem trifluoromethylthiolation and cyclization of N -aryl-3-butenamides was developed, which enabled the selective syntheses of CF 3 S-substituted 3,4-dihydroquinolin-2-ones and azaspiro[4,5]dienones.