Process for the preparation of substituted indanones, and their use
AssigneeHoechst Aktiengesellschaft
InventorsLaurent Weisse, Jurgen Rohrmann, Frank Kuber, Heinz Strutz
Life of this patent
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Abstract
1-Indanones of the formula IV or IVa ##STR1## in which R.sup.1 and R.sup.7 are preferably hydrogen or alkyl, or adjacent radicals R.sup.1 to R.sup.4 form a ring, are obtained in a one-step reaction by reacting a compound I ##STR2## with a compound of the formula II or a compound III ##STR3## in liquid hydrogen fluoride.
Claims6
A process for the preparation of a compound of the formula IV or the isomer thereof of the formula IVa ##STR8## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are identical or different and are hydrogen, (C.sub.1 -C.sub.20)-alkyl, (C.sub.6 -C.sub.14)aryl, (C.sub.1 -C.sub.10)alkoxy, (C.sub.2 -C.sub.10)alkenyl, (C.sub.7 -C.sub.20)arylalkyl, (C.sub.7 -C.sub.20)alkylaryl, (C.sub.6 -C.sub.10)aryloxy, (C.sub.1 -C.sub.10)fluoroalkyl, (C.sub.6 -C.sub.10) haloaryl, (C.sub.2 -C.sub.10)alkynyl, an --SIR.sup.8.sub.3 radical in which R.sup.8 is (C.sub.1 -C.sub.10)alkyl, or are a halogen atom or a heteroaromatic radical having 5 or 6 ring members which may contain one or more heteroatoms, or the adjacent radicals R.sup.1 -R.sup.4, together with the atoms connecting them, form one or more substituted or unsubstituted rings, which comprises reacting a compound of the formula I ##STR9## with a compound of the formula II ##STR10## or with a compound of the formula (III) ##STR11## in which R.sup.1 -R.sup.7 are as defined above, in liquid, anhydrous hydrogen fluoride.
Dependencies are inferred from the claim text.