Indium-mediated allylations of 1,8-dihydroxy-9,10-anthraquinone with allyl, cinnamyl and crotonyl bromides/ chlorides and 1,4- and 1,5- dihydroxy derivatives with allyl bromide in THF–MeOH–H2O gave the respective 10-alkenyl-10-hydroxy-9(10H)-anthracenones in excellent yields.
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