ISSN:
0009-2940
Keywords:
Bianthronyls
;
Bianthronylidenes
;
Helianthrone
;
Mesonaphthobianthrone
;
Photocyclization
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
The synthesis of the novel alkyl-substituted helianthrones 8a, c and mesonaphthobianthrone 9 by photocyclization of the corresponding bianthronylidenes 7a, b is described. Regioselectivity and scope of the photocyclizations of 7a and 7b depend on the substitution pattern. The structures of 7a and 8a have been established by X-ray crystallography and indicate an isomerization about the central double bond of 7a in the photoreaction. The structures of the protonated species of 8a and 9 are elucidated, and their optical absorption and emission behavior is examined.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19931260523
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