Preparation of polyacylated aromatric compounds
AssigneeBASF SE
InventorsWolfgang Siegel, Jochen Schroeder
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Abstract
Polyacylated aromatic compounds of formula I ##STR1## where R.sup.1 is phenyl which is unsubstituted or has inert substituents or is .alpha.-halo-C.sub.1 -C.sub.6 -alkyl, it being possible for these radicals to be identical or different; R.sup.2 is C.sub.1 -C.sub.4 -alkyl; m is 2 or 3; n is 0 to 4, it being possible for the R.sup.2 substituents to be different when n>1, with the proviso that m+n.ltoreq.6, are prepared by reacting an acylaromatic compound of the formula II ##STR2## where p is 1 or 2, with a carbonyl halide of the formula III ##STR3## where X is halogen, in an amount appropriate for the desired degree of acylation, in the presence of Fe(II), Fe(III), Zn(II), Mo(VI), W(VI) or Sn(IV) compounds.
Claims5
A process for preparing polyacylated aromatic compounds of the formula I ##STR9## where R.sup.1 is phenyl which is unsubstituted or has inert substituents or is .alpha.-halo-C.sub.1 -C.sub.6 -alkyl, it being possible for these radicals to be identical or different;
- R.sup.2 is C.sub.1 -C.sub.4 -alkyl;
- m is 2 or 3;
- n is 0 to 4, it being possible for the R.sup.2 substituents to be different when n>1,
- with the proviso that m+n.ltoreq.6, which comprises reacting an acylaromatic compound of the formula II ##STR10## where p is 1 or 2, with a carbonyl halide of the formula III ##STR11## where X is halogen, in an amount appropriate for the desired degree of acylation, in the presence of catalytic amounts of Fe(II), Fe(III), Zn(II), Mo(VI), W(VI) or Sn(IV) compounds.
A process for preparing polyacylated aromatic compounds of the formula I ##STR12## where R.sup.1 is phenyl which is unsubstituted or has inert substituents or is .alpha.-halo-C.sub.1 -C.sub.6 -alkyl, it being possible for these radicals to be identical or different;
- R.sup.2 is C.sub.1 -C.sub.4 -alkyl;
- m is 2 or 3;
- n is 0 to 4, it being possible for the R.sup.2 substituents to be different when n>1,
- with the proviso that m+n.ltoreq.6, which comprises reacting an aromatic compound of the formula IV ##STR13## with a carbonyl halide of the formula III ##STR14## where X is halogen, in an amount appropriate for the desired degree of acylation, in the presence of catalytic amounts of Fe(II), Fe(III), Zn(II), Mo(VI), W(VI) or Sn(IV) compounds.
Dependencies are inferred from the claim text.