| Abstrakt: |
1.In the reaction of 2,4,6-triisopropy1-1,3,5-dioxaphosphorinane with methyl iodide the degree of alkylation depends on the ratio of the reagents. Under the reaction conditions an equilibrium is established between the stereoisomers of 5-methyl-2,4,5-triisopropyl-1,3,5dioxaphosphorinane hydriodide.2.5-Methyl-2,4,6-triisopropyl-1,3,5-dioxaphosphorinane and its sulfide and oxide were isolated as the individual stereoisomers or as their mixtures. The structure of the stereoisomers was established. The conformational free energy of the methyl at the protonated phosphorus atom in the 2,4,6-triisopropyl-1,3,5-dioxaphosphorinane ring was determined. |
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