Novel photochromic dyes for security marking
An elegant synthesis of hitherto inaccessible naphthopyrans bearing one or more strongly electron withdrawing sulfone functions was accomplished. Key to the success of this approach was the development of the deactivating sulfone unit through the oxidation of a thioether moiety post to the Claisen p...
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University of Leeds
2008
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| Online Access: | http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.493300 |