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|Title:||Synthesis and properties of photochromic furofurans|
Schmidt, Andreas Johann
|Abstract:||The deep blue-violet bis-o-quinonemethide 3 cyclizes thermally in a [4s+4a]cycloaddition reaction, yielding the colourless [3,2- b]furofurane 1a. The latter is re-opened by irradiation with UV light back to the methide in its Z,Z- configuration 2a. By metallation of 1a, the highly photoreactive acetylene 8a is obtained which again forms a methide under irradiation, but now in its E,E-configuration 3. The properties of this unique new photochromic system and related furofurans and alkyneshave been investigated.|
|Appears in Collections:||IJC-A Vol.36A(06) [June 1997]|
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