The cyclization reaction of ethynylanilines having phenyl, alkyl, methoxy, cyano, chloro, and ethoxycarbonyl groups with (polystyrylmethyl) trimethylammonium fluoride in dry MeCN under an argon atmosphere at 100° C proceeded in good yields to give the corresponding indoles without affecting these functional groups. Moreover, the polymer-supported fluoride could be reused for the cyclization reaction when the deprotection reaction of the N- ...
