Popis: |
Treatment of 2,2,4,4-tetramethyl-6,7,8-trithiabicyclo[3.2.1]octane 6-exo-oxide (3) with LDA, followed by treatment with D2O, RI (R = Me, Et), and 2-PrBr, yielded the deuterated starting compound (3-d), bicyclic 1,3-dithietane oxides (12, 13), and (2-propyldithio)thiolactone (14), respectively. The initially- formed bridgehead lithium salt (11) opens the bicyclic skeleton to give the lithium δ-thioxoperoxydithiocarboxylate (15), which finally isomerizes to the lithium [3-oxo(2-thianyl)]disulfide (19) via the peroxydithiocarboxylate-α-oxodisulfide rearrangement. |