| 摘要 |
<p>The invention provides a process for the preparation of a compound of general formula M-O-O2S-S-X-S-SO2-O-M (I) where X represents an alkylene radical, and M represents a monovalent metal, the equivalent of a multivalent metal, a monovalent ion derived by the addition of a proton to a nitrogenous base, or the equivalent of a multivalent ion derived by the addition of two or more protons to a nitrogenous base or M represents the equivalent of a complex cation of nickel or cobalt with an amine, which process comprises reacting a dithiol of general formula H-S-X-S-H (II) where X is as defined above with a sulphur trioxide-base complex of formula SO3.A (III) where A is a nitrogenous base selected from optionally substituted pyridine, optionally substituted quinoline and tertiary amines of formula NR<1>R<2>R<3> wherein R<1>, R<2> and R<3> are independently selected from C1-20 alkyl, phenyl and benzyl groups, to produce a compound of formula I wherein M represents a monovalent ion AH<+>, optionally followed by reaction with an alkali metal hydroxide to produce a compound of formula I wherein M represents an alkali metal, optionally followed by conversion of the compound of formula I wherein M represents an alkali metal into another compound of formula I wherein M is as defined above.</p> |
