1: acetyl chloride With AlCl3, aluminium chloride in dichloromethane T=0°C; Friedel-Crafts acetylation; 0.333333 h; 2: bis-maleimidodiphenyl-methane acid in dichloromethane T=0°C; Friedel-Crafts acetylation; 3.5 h;

silver(l) oxide; tetrakis(triphenylphosphine) palladium(0) in tetrahydrofuran T=60°C;

potassium hydroxide; Pd[P(t-Bu3)]2; N-hexadecyl-N,N,N-trimethylammonium bromide in water; toluene T=90°C; 6 h;

carbon disulfide; aluminium trichloride T=0°C;

aluminium trichloride; acetyl chloride in dichloromethane Friedel-Crafts acetylation; anhydrous AlCl3-powder in CH2Cl2 is stirred at 0°C under N2, addn. of acetylchloride in CH2Cl2, stirring (30 min), Cr-compd. is added dropwise within 30 min (stirring, 0°C), further stirring (room temp., 5 h); mixt. is poured into ice-water, sepn. of the layers, aq. layer is extd. with CH2Cl2, combined org. layers are washed (with water, aq. NaHCO3), dried (Na2SO4), concd. (vac., 40-50°C), chromy., main fraction (mixt. of Cr-compds.) is not separable;

T=0°C;

alkali hypobromite

KOCl

(i) PCl5, (ii) KOH, EtOH; Multistep reaction;

diethyl ether; bromine T=10 - 20°C;