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Title: Synthesis and properties of photochromic furofurans
Authors: Laatsch, Hartmut
Schmidt, Andreas Johann
Kral, Andreas
Heine, Niklas
Haucke, Gunter
Issue Date: Jun-1997
Publisher: NISCAIR-CSIR, India
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.
Page(s): 476-484
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.36A(06) [June 1997]

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