Metal-free sigmatropic rearrangement/cyclization/aromatization cascade reaction of hydroxy/aminophenyl propargyl alcohols with fluoroalkanesulfinyl chlorides: Synthesis of 3‑fluoroalkanesulfonyl benzofurans and indoles

A metal-free protocol to synthesize 2-alkyl-3‑fluoroalkanesulfonyl benzofurans and indoles from o ‑hydroxyphenyl/ o ‑aminophenyl propargyl alcohols or 2-propynolphenols/2-propynolanilines and fluoroalkanesulfinyl chlorides (R F SOCl) was disclosed. The mechanism is proposed to involve a sequential [1,2]/[2,3]-sigmatropic...