The stereochemistry of the SRN1 reaction in some cyclohexane derivatives
作者:Robert K. Norris、Rosalind J. Smyth-King
DOI:10.1016/0040-4020(82)80122-1
日期:1982.1
substitution reactions of nitrocyclohexanes 8, 9, 12 and 23 with various nucleophiles were studied and were found to proceed by the electron-transfer initiated SRN1 mechanism. Epimeric products were formed and the proportion of epimers under both thermodynamic and kinetic control normally reflected the bulk of the incoming nucleophile relative to the substituent which was present at the reaction site. In
An example of substitution proceeding with retention in the S RN1 reaction. Trapping of a pyramidal benzylic radical by benzenethiolate ion
作者:Robert K. Norris、Rosalind J. Smyth-King
DOI:10.1039/c39810000079
日期:——
The SRN1reaction of c-4-t-butyl-c-2-methyl-r-1-nitro-1-p-nitrophenylcyclohexane with sodium benzenethiolate in hexamethylphosphoramide, which proceeds with retention of configuration at C-1 at relatively high thiolate concentrations, and with competing inversion and retention at lower thiolate concentrations, implicates the formation and trapping of a pyramidal benzylic radical.
c -4-叔丁基-c -2-甲基-r -1-硝基-1-对硝基苯基环己烷与苯硫酸钠在六甲基磷酰胺中的S RN 1反应,该反应在较高的C-1保持构型硫醇盐的浓度,以及竞争性的转化和在较低硫醇盐浓度下的保留,都意味着金字塔状苄基的形成和捕获。