Effets de substituants en serie dialkyl-1,2 cyclohexanique-I
作者:A. Pons、J.P. Chapat
DOI:10.1016/0040-4020(80)80115-3
日期:1980.1
The equilibration of the cis and trans isomers of four epimeric pairs of 3,4-dialkyl cyclohexanones (alkyl = Me, Et) have been studied quantitatively at different temperatures. The thermodynamic constants ΔH and Δs exhibit considerable variations depending on the nature (Me or Et) of the substituents. These quantities were also calculated from statistical considerations. Theoretical and experimental
Stereochemistry of the C3 addition of 1-lithio 1,1-bis methylselenoalkanes to methyl cyclohexenones
作者:J. Lucchetti、A. Krief
DOI:10.1016/s0040-4039(01)90394-6
日期:1981.1
The presence of DME or HMPT allows the C3 regio and stereoselective introduction of 1,1-bis methylselenoalkanes to methyl cyclohexenones. The resulting compounds have been stereoselective transformed to 3-ethyl methyl cyclohexanones