- Novel Photochromic Systems: Tetra-, Hexa-, and Octahydroindolizines
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In this paper novel spiro-tetra- (5,5'), spiro-hexa- (6), and spiro-octahydroindolizines (7) are presented.The synthesis of 5, 5', 6a, b, and 7 is described.LIS are employed for structure elucidation.UV kinetics - especially flash spectroscopy - demonstrate that a reversible electrocyclic reaction of the tetrahydroindolizines 5 is responsible for the photochromic properties of 5. 5'h is an exception, whereas 6a, b, and 7 are not photochromic at all.
- Duerr, Heinz,Gross, Hubert,Zils, Klaus-Dieter,Hauck, Gerd,Klauck, Guenter,Hermann, Horst
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p. 3915 - 3925
(2007/10/02)
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