Total syntheses of (.+-.)-duanomycinone. Regiospecific preparations of (.+-.)-7,9-dideoxydaunomycinone and 6,11-dihydroxy-4-methoxy-7,8,9,10-tetrahydronaphthacene-5,9,12-trione
Total syntheses of (.+-.)-duanomycinone. Regiospecific preparations of (.+-.)-7,9-dideoxydaunomycinone and 6,11-dihydroxy-4-methoxy-7,8,9,10-tetrahydronaphthacene-5,9,12-trione