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Umsetzung von 4‐Bromisophoron (I) mit Na‐methylat(II)/Methanol (III) führt zum 2‐Methoxycyclohexenon (IV).

Bromination of isophorone with excess of bromine in carbon tetrachloride at 0° gave 2,4,6‐tribromo‐3‐bromomethyl‐5, 5‐dimethyl‐2‐cyclohexenone which on further treatment with bromine afforded 2,4,6, 6‐tetrabromo‐3‐bromomethyl‐5, 5‐dimethyl‐2‐cyclohexenone. Bromination of isophorone and 4‐bromoisophorone at 25° gave rasp. 2,6,6‐tribromo‐ and 2,4,6‐tribromo‐3‐dibromomethyl‐5,5‐dimethyl‐2‐cyclohexenone. The possible rearrangement in dimethylformamide and the catalytic hydrogenation of the bromo compounds were investigated. The reaction of isophorone oxide with hydrogen bromide did not give brominated products.