| 摘要 |
The preparation of 2-cyano-3,3-diarylacrylates I <IMAGE> (I) (in which Ar1 and Ar2 are aromatic radicals and R is an aliphatic radical having from 3 to 30 carbon atoms) by reacting a 2-cyano-3,3-diarylacrylate II <IMAGE> (II) (in which R1 is methyl or ethyl) with an alcohol III R-OH(III) in the presence of a basic catalyst with removal of the alcohol R1-OH formed. The esters of formula I are valuable UV absorbing agents for, say, plastics materials.
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