Bulletin of the Academy of Sciences of the USSR Division of Chemical Science p. 945 - 950 (1991)
Update date:2022-08-04
Topics:
Dzhemilev, U. M.
Dokichev, V. A.
Sultanov, S. Z.
Sadykov, R. A.
Tolstikov, G. A.
Nefedov, O. M.
A preparative method has been developed for the synthesis of cyclohepta-1,3,5-trienes, using a reaction of aromatic hydrocarbons with diazomethane, methyldiazoacetate, adamantanoyldiazomethane, and 1-diazo-3-phenylpropan-2-one, with rhodium trifluoroacetate as catalyst.The order of activity and the relative reactivity coefficients of substituted benzenes have been determined, and the link between these characteristics and the energy of the highest occupied molecular orbital of the aromatic ring has been established.In catalyzed reactions of benzenes with diazomethaneor methyldiazoacetate, leading to cycloheptatrienes, effects of chemical polarization of the ring have not been observed.
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