The reaction of O-methyl-, ethyl-, and benzylxanthates with a catalytic amount of triethylamine in the presence of excess carbon disulfide gave the corresponding trithiocarbonate in good yields. The products were formed by the nucleophilic reaction of −SCSSR with xanthates. The kinetic study showed the following order of nucleophilicity toward xanthates in DMF: −SCOSMe>−SCSSMe>Me3N
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Yoshida et al. (1971) studied this question.
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