FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing 1,2-diarylethane-1,2-diones of general formula 1:
Ar=Ph (a), m-tolyl – (b), 1-naphthyl – (c), from aromatic acid esters, in the presence of a catalyst, magnesium powder, in tetrahydrofuran, in an argon atmosphere, at atmospheric pressure, according to the invention, the catalyst used is Cp2ZrCl2, the aromatic acid esters used are ArCOOR, where Ar = Ph, R = n-Bu, Ar = m-tolyl, R = Me, Ar = 1-naphthyl, R = Et, reaction is carried out in presence of trimethylchlorosilane (Me3SiCl), with molar ratio ArCOOR:Mg:Zr:Me3SiCl = 1:(1-4):(0.08-0.12):(3-8), at 50 °C, for 6 h.
EFFECT: novel method of producing 1,2-diarylethane-1,2-diones (1) from esters of aromatic acids in presence of magnesium, a catalyst and trimethylchlorosilane, which reduces fire hazard associated with use of EtAlCl2, and obtain 1,2-diarylethane-1,2-diones (1) with output of 81-87%.
1 cl, 1 tbl, 16 ex
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