Nickel(0) complex, generated in situ from bis(triethylphosphine)nickel(II) chloride and sodium cyanoborohydride, catalyzed the nucleophilic displacement of aryl iodides with thiourea. S-Aryl-isothiuronium salts or aromatic thiols were obtained in good yields after simple work-up procedures.
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Kentaro Takagi (1985) studied this question.