Irradiation of 3-methoxyphenol in the presence of 2 equiv of AlBr3 in CH2Cl2 gave 4-methoxybicyclo[3.1.0]hex-3-en-2-one in a 38% yield. 3-Methoxy-2-methylphenol also yielded the lumiketone rearrangement product. On the other hand, 3-methoxy-4-methyl-, 3-methoxy-5-methyl-, and 5-methoxy-2-methylphenol underwent transposition of the methyl group to give equilibrium mixtures of the three methoxycresols.