Knoevenagel reaction of semiquinoid compounds |
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| Authors: | V. A. Nikanorov S. V. Sergeev V. I. Rozenberg O. A. Reutov |
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| Affiliation: | 1. A. N. Nesmeyanov Institute of Heteroorganic Compounds, Academy of Sciences of the USSR, Moscow
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| Abstract: | | 1. | The possibility was demonstrated for the base-catalyzed Knoevenagel condensation of 4-methyl-4-trichloromethyl-2,5-cyclohexadien-1-one with dimedone with the formation of 4-methyl-4-trichloromethyl-1-(4,4-dimethyl-2,6-dioxocyclohexylidene)-2,5-cyclohexadiene. | | 2. | An explanation was offerred for the thermal stability and spectral characteristics of the semiquinoid trienedione obtained assuming polarization of the product molecule due to the presence of two extended (C=C)2C=C(C=O) cross- ,,-conjugation chains. |
Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 925–928, April, 1988. |
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