Solid-State Photocyclodimerization of 1-Thiocoumarin (= 2H-1-Benzothiopyran-2-one)
作者:Christian P. Klaus、Carolin Thiemann、J�rgen Kopf、Paul Margaretha
DOI:10.1002/hlca.19950780504
日期:1995.8.9
Irradiation (λ > 390 nm) of 2H-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
固态的2 H -1-苯并噻喃-2-酮(1)的辐照(λ> 390 nm)可选择性提供6aα,6bα,12bα,12cα-四氢环丁[1,2- c:4,3- c ']双[1]苯并噻喃-6,7-二酮(2),头对头(HH)顺式-顺式-顺式-二聚体,而在固态下使用较短的波长(λ> 340 nm)辐射1所有四个的混合物的顺式-融合三环二聚体2 - 5。这些结果代表了固态光化学中的新型波长效应。