| 摘要 |
<p>The preparation of pyrene compounds of the formula <IMAGE> I wherein R represents an optionally substituted alkyl, alkenyl, cycloalkyl, aralkyl or aryl radical, by reaction of cyanuric chloride with pyrene in the presence of an aluminium halide and then reaction of the product with a compound M-OR (M=an alkali metal) can be improved by allowing a complex of an aluminium halide and cyanuric chloride to act on pyrene and reacting the product with a compound RO-M The compounds of the formula I are known optical brighteners.</p> |
