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The synthesis of 4-(3′,5′-diiodo-2′-hydroxy-phenyl)- 2-(N,N-dialkylamino)-1,3-dithiolium perchlorates has been performed by cyclization of the corresponding N,N-dialkylaminocarbodithioates in presence of the “superacid” mixture P2O5–CH3SO3H.
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M. L. Birsa (2001) studied this question.
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