Abstract A general method for the synthesis of 1-alkyl (allyl)(benzyl)-substituted (indol-3-yl)- sulfanylalkanecarboxylic acids and hexane-1, 6-diyl (1, 4-phenylenemethylene) bisindol-3- ylsulfanylalkanecarboxylic acids from the corresponding N-substituted indoles and bisindoles, thiourea, iodine, and halogencarboxylic acids was developed. The oxidation of substituted (indol-3-yl) sulfanylalkanecarboxylic acids for the first time afforded their ...