Conclusions
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1.
The influence of pressure on asymmetric diene condensation of butadiene with di-(−)-menthyl fumarate was investigated. At atmospheric pressure (70°), the optical yield is equal to 0; at 5000 kg/cm2, an excess of the di-(−)-menthyl ester of (+)-Δ4-trans-cyclohexene-1,2-dicarboxylic acid is formed with an optical yield of 4.7%.
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2.
In the reaction studied, the transition state in the formation of the dimenthyl ester of the (+)-acid is characterized by lower values of the energy, entropy, and volume than in the case of the (−)-acid.
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3.
The role of the change in the free volume as a component of the volume effect of activation was discussed. It was concluded that there is a relationship between the steric hindrance of the reaction and the change in the free volume in the formation of the transition state.
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4.
Hypotheses are expressed on the principles of the influence of pressure on asymmetric synthesis.
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A brief communication was published earlier [1].
Deceased.
Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1658–1663, August, 1971.
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Él'yanov, B.S., Klabunovskii, E.I., Gonikberg, M.G. et al. Influence of pressure on asymmetric synthesis. Russ Chem Bull 20, 1557–1561 (1971). https://doi.org/10.1007/BF00860003
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DOI: https://doi.org/10.1007/BF00860003