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- Title
Solid-State Photocyclodimerization of 1-Thiocoumarin (= 2 H-1-Benzothiopyran-2-one).
- Authors
Klaus, Christian P.; Thiemann, Carolin; Kopf, Jürgen; Margaretha, Paul
- Abstract
Irradiation (λ > 390 nm) of 2 H-1-benzothiopyran-2-one ( 1) in the solid state affords selectively 6aα,6bα,12bα,12cα -tetrahydrocyclobuta[1,2- c:4,3- c′]bis[1]benzothiopyran -6,7-dione ( 2), the head-to-head ( HH) cis- cisoid-cis-dimer, while irradiation of 1 in the solid state using shorter wavelengths (λ > 340 nm) affords a mixture of all four cis-fused tricyclic dimers 2- 5. These results represent a novel wavelength effect in solid-state photochemistry.
- Publication
Helvetica Chimica Acta, 1995, Vol 78, Issue 5, p1079
- ISSN
0018-019X
- Publication type
Article
- DOI
10.1002/hlca.19950780504