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Photochemical isomerization of 2-alkyl-2-phenyl-1,3-indanediones to E-disubstituted and Z-disubstituted methylenephthalides

P. Hrnčiar, A. Gáplovský, V. Drgoncová, and J. Donovalová

Department of Organic Chemistry, Faculty of Natural Sciences, Komenský University, CS-842 15 Bratislava

 

Abstract: Photochemical isomerization of 2-R-2-phenyl-1,3-indanediones (R = CH5CH2,CH3CH2,CH3) to corresponding E- and Z-isomers of disubstituted methylenephthalides revealed that the nature of R affects both the proportion of E- and Z-isomers of phthalides and the yield of isomerization, but has no significant influence on quantum yields. Attempted isomerization of the formed phthalides to the parent derivatives of 1,3-indanedione met with failure.

Full paper in Portable Document Format: 405a649.pdf

 

Chemical Papers 40 (5) 649–654 (1986)

Thursday, May 23, 2024

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