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Definitions

• the present invention relates to a simple and economically interesting process for preparing substituted indanones.
• substituted indanones can be used to prepare bridged chiral metallocenes which are of great importance as highly active catalysts in olefin polymerization (cf. EP-A 129 368).
• the catalyst properties can be influenced in a targeted manner by variation of the ligand system, eg. by substitution. This makes it possible to achieve the desired degree of change in the polymer yield, the tacticity or the melting point of the polymers (New J. Chem., 1990, 14, 499; Organomet., 1990, 9, 3098; Angew. Chem., 1990, 102, 339; EP-A 316 155; EP-A 351 392).
• Bridged zirconocenes containing, as ⁇ ligands, substituted indenyl radicals which bear the bridge in position 1, preferably a hydrocarbon radical in position 2 and a hydrocarbon radical, preferably an aryl radical, in position 4 have been found to be particularly active and stereoselective catalyst systems (EP 0 576 970 Al; EP 0 629 632 A2 ) .
• the ligand systems used for these highly active metallocenes are prepared from the corresponding indenes which are in turn obtained from indanones which are substituted in the appropriate positions (EP 0 576 970 Al; EP 0 629 632 A2 ) .
• These indanones are synthesized from commercially available precursors or precursors known in the literature, for example as follows:
• the three synthetic routes shown by way of example go through 2-, 4-substituted indanones which have in each case been obtained by Friedel-Crafts cyclization of the corresponding 3-arylpropionic acids.
• the syntheses are multistage processes in which relatively expensive starting compounds are used.
• the syntheses disclosed in EP 0 629 632 the introduction of a protective group cannot be avoided.
• the processes shown are thus very costly routes. It is therefore an object of the present invention to find a simple, flexible, inexpensive process for preparing substituted indanones which are important intermediates for preparing active compounds and metallocene complexes.
• the present invention accordingly provides a process for the preparation of indanones of the formula II from indanones of the formula I or of indanones of the formula Ila from indanones of the formula la
• R 1 is a C ⁇ -C 4 o-group such as a C ⁇ -Co-hydrocarbon group which is bound via a carbon atom and may bear one or more identical or different heteroatom-containing radicals as substituents, eg. a linear, branched or cyclic C ⁇ -C 20 -alkyl group which may bear one or more identical or different halogen, OH, OR 2 , SR 2 NR 2 2 -, PR 2 2 -, -SiR 2 3 or -OSiR 2 3 substituents, a C 6 -C 22 -aryl group which may bear one or more identical or different halogen, OH, OR 2 , SR 2 NR 2 2 -, PR 2 2 -, -SiR 2 3 or -OSiR 2 3 substituents, a C 7 -C 20 -alkylaryl group or a C 7 -C 20 -arylalkyl group, where the alkyl part may bear one or more identical or different hal
• R 3 is a C ⁇ -C 40 -hydrocarbon group which is bound via a carbon atom and may bear one or more identical or different heteroatom-containing radicals as substituents, for example a linear, branched or cyclic C ⁇ -C 20 -alkyl group which may bear one or more identical or different halogen, OH, OR 2 , SR 2 , NR 2 2 -, PR 2 2 ⁇ , -SiR 2 3 or -OSiR 2 3 substituents, a C 6 -C 22 -aryl group which may bear one or more identical or different halogen, OR 2 , SR 2 , NR 2 2 ⁇ , NH 2 , -N 2 H 3 , N0 2 , CN, C0 2 R 2 , CHO, COR 2 , PR 2 2 -, -SiR 2 3 or -OSiR 2 3 substituents, a C 7 -C ⁇ s-alkylaryl group or C 7 -C ⁇ 5 -
• a C ⁇ -C ⁇ n-alkyl group or C 6 -C 1 -aryl group which may each bear one or more identical or different halogen, OH, OR 2 , SR 2 NR 2 2 -, PR 2 -/ -SiR 2 3 or -OSiR 2 3 substituents, or two radicals R 2 may be joined to form a ring system, or R 3 is a C ⁇ -C 2 o-heterocyclic group which is bound via a carbon atom and may in turn bear C ⁇ -C 2 o-radicals or heteroatoms as substituents , Y 1 , Y 2 and Y 3 are identical or different and are each a hydrogen atom or are as defined for X or R 3 , and
• Y 4 , Y 5 and Y 6 are identical or different and are each a hydrogen atom or are as defined for R 3 .
• the indanones of the formula I or la are converted directly into the indanones of the formula II or Ila in one reaction step by reaction with the coupling component. In this reaction, no use is made of protective groups for the carbonyl function of the indanone of the formula I or la.
• heteroatom refers to any atom of the Periodic Table of the Elements with the exception of carbon and hydrogen.
• a heteroatom is preferably an atom of Group 14, 15 or 16 of the Periodic Table of the Elements with the exception of carbon.
• heterocyclic group refers to a heteroatom-containing cyclic group.
• indanones of the formula I or la in which X is chlorine, bromine, iodine, triflate, nonaflate, mesylate, ethylsulfonate, benzenesulfonate, tosylate, triisopropylbenzene- sulfonate, formate, acetate, trifluoroacetate, nitrobenzoate, halogenated arylcarboxylates, in particular fluorinated benzoate, methyl carbonate, ethyl carbonate, benzyl carbonate, tert-butyl carbonate, dimethyl phosphonate, diethyl phosphonate, diphenyl phosphonate or diazonium, R 1 is a linear, branched or cyclic Ci-Ce-alkyl group which may - bear one or more identical or different fluorine, chlorine, OR 2 , PR 2 2 -, NR 2 2 2
• R 1 is an OR 2 , PR 2 2 , R 2 2 , -SiR 2 3 or -OSiR 2 3 group, where R 2 are identical or different and are each a C ⁇ -C 4 -alkyl group or C ⁇ -Cio-aryl group, where the alkyl group may bear one or more identical or different fluorine, chlorine, OR 2 , SR 2 , NR 2 2 ⁇ , PR 2 2 -, -SiR 2 3 or -OSiR 2 3 substituents and the aryl group may bear one or more identical or different fluorine, chlorine, OR 2 , SR 2 , NR 2 2 ⁇ , PR 2 2 -, -SiR 2 3 or -OSiR 2 3 substituents and the aryl group may bear one or more identical or different fluorine, chlorine, OR 2 , SR 2
• Y 1 , Y 2 and Y 3 are identical or different and are each a hydrogen atom or are as defined for R 3 or X and at least one of the radicals Y 1 , Y 2 and Y 3 , preferably Y 3 , is a hydrogen atom
• Y 4 , Y 5 and Y 6 are identical or different and are each a hydrogen atom or are as defined for R 3 and at least one of the radicals Y 4 , Y 5 and Y 6 , preferably Y 6 , is a hydrogen atom.
• indanones of the formula I or la in which X is chlorine, bromine, iodine, triflate, nonaflate, mesylate, tosylate or diazonium, R 1 is a linear, branched or cyclic Ci-C ⁇ -alkyl group which may bear one or more identical or different fluorine, chlorine, OR 2 or NR 2 2 substituents, a phenyl group which may bear one or more identical or different fluorine, chlorine, OR 2 or NR 2 2 substituents, a C 7 -C ⁇ 2 -alkylaryl or arylalkyl group, where the alkyl part may bear one or more identical or different fluorine, chlorine, OR 2 or NR 2 2 substituents and the aryl part may bear one or more identical or different fluorine, chlorine, OR 2 or NR 2 2 substituents, a C 2 -C ⁇ -alkenyl group or a C 2 -C ⁇ -alkynyl group which may
• a C ⁇ -C ⁇ o-alkyl group or C 6 -Ci 4 -aryl group which may each bear one or more identical or different halogen, OH, OR 2 , SR 2 , NR 2 2 -, PR 2 2 ⁇ , ⁇ SiR 2 3 or -OSiR 2 3 substituents, or two radicals R 2 may be joined to form a ring system, or Y 1 , Y 2 or Y 3 are each a C ⁇ -C 2 o-heterocyclic group which is bound via a carbon atom and may in turn bear C ⁇ -C 2 o-radicals or heteroatoms as substituents, and at least two of the radicals Y 1 , Y 2 and Y 3 are each a hydrogen atom, preferably Y 1 and Y 3 .
• R 3 is a C ⁇ -C ⁇ 4 -group such as a linear, branched or cyclic Ci-Cg-alkyl group which may bear one or more identical or different fluorine, 0R 2a , NR 2a - or OSiR 2a 3 substituents, a C 6 -Ci 4 -aryl group which may bear fluorine, chlorine, R 2 , OR 2a or NR 2a 2 substituents, a C 7 -C 10 -alkyl- aryl group or C 7 -C ⁇ o-arylalkyl group, where the alkyl part may bear one or more identical or different fluorine, 0R 2a , NR 2a 2 - or OSiR 2a 3 substituents and the aryl part may bear one or more identical or different fluorine, chlorine, 0R 2a or NR 2a 2 substituents, a C 2 -C ⁇ -alkenyl group which may bear one or more identical or different fluorine, 0R
• indanones of the formula I which do not, however, restrict the scope of the invention, are: -methy1-7-chloro-1-indanone -methyl-7-bromo-l-indanone -methyl-7-iodo-l-indanone -methyl-7-trifluoroacetoxy-l-indanone -methyl-7-trifluoromethanesulfonoxy-l-indanone -methy1-7-methanesulfonoxy-1-indanone -methyl-7-ethanesulfonoxy-l-indanone -methy1-7-(p-toluenesulfonoxy)-l-indanone -methy1-7-benzenesulfonoxy-1-indanone -methy1-7-(2,4, 6-triisopropylbenzenesulfonoxy)-1-indanone -methy1-7-pentafluorobenzenesul
• indanones of the formula II which, however, do not restrict the scope of the invention, are: 2-methy1-7-phenyl-1-indanone
• indanones of the formula Ila which, however, do not restrict the scope of the invention, are: 2-methy1-4-phenyl-l-indanone
• the coupling component serves to introduce the radical R 3 . It is also possible for the coupling component to convert one or more of the radicals Y 1 , Y 2 and Y 3 which are as defined for X into radicals Y 4 , Y 5 and Y 6 which are as defined for R 3 .
• the coupling components are preferably compounds containing elements of Groups 13-17 of the Periodic Table of the Elements.
• the coupling components are preferably compounds containing boron, carbon, silicon, germanium, tin, phosphorus or fluorine.
• the coupling components are particularly preferably compounds containing boron, carbon, silicon, tin or phosphorus.
• Preferred boron-containing coupling components are boronic acids and boronic esters, for example of the type R-B(OR 5 ) 2 , where R 4 is a C ! -C 4 o-group such as a linear, branched or cyclic c ⁇ -C 2 o- lkyl group which may bear one or more identical or different halogen, OH, OR 2 , SR 2 , NR 2 -, PR 2 2 -, -SiR 2 3 or -OSiR 2 3 substituents, a C 6 -C 22 - ryl group which may bear one or more identical or different halogen, OR 2 , SR 2 , NR 2 2 -, NH 2 , - 2 H 3 , NO 2 , CN, CO 2 R 2 , COR 2 4 , CHO, PR 2 2 -, -SiR 2 3 or -OSiR 2 3 substituents, a C-Ci 5 -alkylaryl group
• o-alkenyl group which may bear one or more identical or different halogen, OH, OR 2 , SR 2 , NR 2 ⁇ , PR 2 -, -SiR 2 3 or -OSiR 2 3 substituents, a C 2 -C ⁇ o-alkynyl group which may bear one or more identical or different halogen, OH, OR 2 , SR 2 , NR 2 2 -, PR 2 2 ⁇ , -SiR 2 3 or -OSiR 2 3 substituents, a C B -C ⁇ 2 ⁇ arylalkenyl group which may bear one or more identical or different halogen, OH, OR 2 , SR 2 , R 2 -, PR 2 2 -, -SiR 2 3 or -OSiR 2 3 substituents, or R 4 is a C ⁇ -C 2 o ⁇ heterocyclic group which may in turn bear C ⁇ -C 2 o-radicals or heteroatoms as substituents,
• R 5 are identical or different and may each be a hydrogen atom, a linear, branched or cyclic C ⁇ C 4 o-group, for example a C ⁇ -C 2 o-alkyl group or a C 6 -C ⁇ 4 -aryl group, or form a ring system. Also preferred are condensation products of the abovementioned boronic acids and boronic esters.
• Preferred boron-containing coupling components are, furthermore, boranes, for example of the type R 6 -B(R 7 ) 2 , where R 6 is a linear, branched or cyclic C ⁇ -C 2 o-alkyl group or a C 6 -C 4 -aryl group, which may each bear one or more identical or different halogen, OR 2 , SR 2 , NR 2 2-, NH 2 , -N 2 H 3 , N0 2 , CN, C0 2 R 2 , COR 2 , CHO, PR 2 -, -SiR 2 3 or -OSiR 2 3 substituents, and R 7 are identical or different and are each halogen, a linear, branched or cyclic C ⁇ -C 4 fj-group, for example a C ⁇ -C 2 o ⁇ alkyl group or a C ⁇ -C ⁇ 4 -aryl group, or R 7 form a ring system.
• R 6 is a linear,
• diboranes for example of the type
• carbon-containing coupling components examples include alkenes and alkynes. Particular preference is given to alkenes and alkynes of the formula
• R, R' are identical or different and are each H or a Cx-C ⁇ -alkyl group, where one or two CH 2 groups may be replaced by identical or different -C0-, -C(0) ⁇ -, CONR 2 and phenylene groups and from 1 to 3 H of R may be replaced by identical or different SiR 3 2 , OH, F, Cl, CN and CO 2 R 2 substituents, and in which R" is H and R 2 is as defined above.
• silicon-containing coupling components are compounds of the type R 4 -Si(R 7 ) 3 with the abovementioned definitions for R 4 and R 7 .
• tin-containing coupling components are stannanes, for example of the type R 4 -Sn(R 7 ) 3 , and also distannanes of the type (R 7 ) 3 Sn-Sn(R 7 ) 3 with the abovementioned definitions for R 4 and R 7 .
• Examples of phosphorus-containing coupling components are compounds of the type (R 5 ) 2 P-R 8 , where the radical R 8 is H, Sn(R 7 ) 3 or Si(R 7 ) 3 and R 5 and R 7 are as defined above.
• fluorine-containing coupling components are fluoride salts in which the cation is an element of groups 1-3 of the Periodic Table of the Elements or, particularly preferably, is a bulky peralkylated ammonium, sulfoniu , amidosulfonium, phosphonium, amidophosphonium or guanidinium cation.
• boronic acids and boronic esters are: phenylboronic acid p-tolylboronic acid m-tolylboronic acid o-tolylboronic acid
• stannanes and distannanes examples include: phenyltrimethylstannane phenyltributylstannane tetraphenylstannane p-tolyltrimethylstannane m-tolyltributylstannane o-tolyltrimethylstannane
• 5-dimethylphenyltrimethylstannane mesityltrimethylstannane tetramethylphenyltrimethylstannane butylphenyltrimethylstannane tert-butylphenyltributylstannane isopropylphenyltrimethylstannane cyclohexylphenyltrimethylstannane 4-(hex-5-en-l-yl)phenyltrimethylstannane triisopropylsilylphenyltrimethylstannane p-methoxyphenyltrimethylstannane m-methoxyphenyltributylstannane o-methoxyphenyltrimethylstannane
• alkenes and alkynes are: ethylene, styrene, ⁇ -methylstyrene, p-methylstyrene, 2,4, 6-trimethylstyrene, p-methoxystyrene, p-vinylstyrene, p-dimethylaminostyrene, p-chlorostyrene, p-aminostyrene, vinylnaphthalene,
• silicon compounds examples include phenyltrimethylsilane phenyltrifluorosilane naphthyltrimethyIsilane naphthyltrifluorosilane
• Examples of above-described phosphorus compounds are: diphenylphosphine di(o-tolyl)phosphine di(bis (trifluoromethy1)phenylphosphine) trimethylstannyldi(p-methoxypheny1)phosphine trimethyIsilyldiphenylphosphine trimethylstannyldiphenylphosphine dibutylphosphine dimethylphosphine triethylsilyldimethylphosphine dicyclohexylphosphine trimethylsilyldicyclohexylphosphine trimethylstannylcyclohexylbutylphosphine
• the process of the present invention for preparing indanones of the formula II or Ila can be carried out, for example, by reacting the indanones of the formula I or la with the above-described coupling components such as boron-, carbon-, tin-, silicon- or phosphorus-containing compounds in a solvent, eg. a nonpolar, polar aprotic or polar protic solvent or any mixtures of components of these solvent classes.
• a solvent eg. a nonpolar, polar aprotic or polar protic solvent or any mixtures of components of these solvent classes.
• Solvents which can be used are, for example, hydrocarbons, halogenated hydrocarbons, ethers, polyethers, ketones, esters, amides, amines, ureas, sulfoxides, sulfones, phosphoramides, alcohols, polyalcohols, water and mixtures of these.
• Preferred solvents are aromatics such as benzene, toluene, xylene, esitylene, ethylbenzene, ethers such as diethyl ether, MTBE, THF, dioxane, anisole, di-n-butyl ether, DME, diglyme, triglyme, acetone, ethyl methyl ketone, isobutyl methyl ketone, ethyl acetate, DMF, dimethylacetamide, NMP, HMPA, acetonitrile, triethylamine, water, methanol, ethanol, isopropanol, isobutanol, ethylene glycol, diethylene glycol, glycerol, triethylene glycol and mixtures of these.
• aromatics such as benzene, toluene, xylene, esitylene, ethylbenzene, ethers such as diethyl ether,
• toluene xylene, diethyl ether, MTBE, THF, DME, diglyme, acetone, DMF, NMP, water, ethylene glycol and mixtures of these.
• the process of the present invention can be carried out, if desired, in the presence of a catalyst and, if desired, in the presence of a base, a salt-like additive or a phase transfer catalyst.
• the catalysts which can be used in the process of the present invention comprise transition metal components such as transition metals or transition metal compounds and, if desired, cocatalyst components which can act as ligands.
• transition metal components preference is given to using transition metals of groups 6 to 12 of the Periodic Table of the Elements or compounds of these transition metals.
• transition metal components are transition metals of groups 8 to 10 of the Periodic Table of the Elements.
• Preferred transition metal components are nickel, palladium and platinum and also compounds of these transition metals, in particular nickel and palladium and also their compounds (J. Tsuji, Palladium-Reagents and Catalysts, Wiley 1995; M. Beller et al., Angew. Chem., 107, 1995, pp. 1992-1993), which can, if desired, be used in the presence of one or more cocatalysts .
• catalysts which, however, do not restrict the scope of the invention, are Ni(C0 4 ), NiCl 2 (P 3 ) 2 , NiCl 2 (PBu 3 ) 2 , Ni(PF 3 ) 4 , Ni(C0D) 2 , Ni(PPh 3 ) 4 , Ni(acac) 2 , Ni(dppe)Cl 2 , Ni(dppp)Cl 2 , Ni(dppf)Cl 2 , NiCl 2 (PMe 3 ) 2 , Pd(OAc) 2 /PPh 3 , Pd(OAc) 2 /P(MeOPh) 3 , Pd(OAc) 2 /PBu 3 , Pd(OAc) 2 /AsPh 3 , Pd(OAc) 2 /SbPh 3 , Pd(0Ac) 2 /dppe, Pd(OAc) 2 /dppp, Pd(OAc) 2 /dppf,
• Very particularly preferred catalysts are NiCl 2 (PPh 3 ) 2 , Ni(dppe)Cl 2 , Ni(dppp)Cl 2 , Ni(dppf )Cl 2 , Pd(OAc ) 2 /PPh 3 , Pd(0Ac) 2 / P(o-tolyl) 3 , Pd(PPh 3 ) 4 , PdCl 2 (PPh 3 ) 2 , PdCl 2 /PPh 3 , PdCl 2 (dppp) , PdCl 2 (dppe ) , PdCl 2 (dppf ) , Pd(OAc ) 2 /tris (m-PhS0 3 Na)phosphine, and
• the amount of catalyst used is generally from 100 mol% to 10- 6 mol%, preferably from 10 mol% to 10 -5 mol%, particularly preferably from 5 mol% to 10 -4 mol%, in each case based on the indanone of the formula I or la.
• the process of the present invention is carried out in the presence of bases and/or phase transfer catalysts.
• bases which do not, however, restrict the scope of the invention, are hydroxides, alkoxides, carboxylates, carbonates and hydrogen carbonates, oxides. fluorides, phosphates and amines.
• Preferred bases are Li 2 C0 3 , Na 2 C0 3 , NaHC0 3 , K 2 C0 3 , Cs 2 C0 3 , LiOH, NaOH, KOH, CsOH, NaOMe, KOtBu, K 3 P0 4 , LiF, NaF, KF, CsF, NaOAc, KOAc, Ca(OAc) 2 , K(t-BuC0 ), CaO, BaO, Ca(OH) 2 , Ba(OH) 2 , MgC0 3 , CaC0 3 , BaC0 3 , TIOH, Tl 2 C0 3 , Ag 2 0, ZnC0 3 , Bu 4 NF, [ (Et 2 N) 3 S]Me 3 SiF2, DBU or amines such as triethylamine, diisopropylethylamine, dicyclohexylethylamine or dimethylaniline.
• Phase transfer catalysts which can be used are ammonium or phosphonium salts and also crown ethers.
• Illustrative examples of phase transfer catalysts, which do not, however, restrict the scope of the invention are BU 4 NCI, Bu 4 NBr, BU 4 NI, BU 4 NHSO 4 , Et 3 BnNBr, Me 3 BnNCl, aliquot, PtLjPBr, PI- 4 PCI, 18-crown-6, 15-crown-5, 12-crown-4, dibenzo-18-crown-6.
• the reaction can be carried out in the presence of one or more salt-like additives.
• salt-like additives which do not, however, restrict the scope of the invention, are LiCl, LiBr, LiF, Li, LiBF 4 , LiPF 6 , LiC10 4 , LiCF 3 C0 2 , lithium triflate, LiNTf 2 , AgN0 3 , AgBF , AgCF 3 C0 2 , silver triflate, AgPF 6 , CuCl, CuBr, CuJ, CuCN, Li 2 Cu(CN)Cl 2 , ZnCl 2 , ZnBr 2 , Znl / zinc triflate and Zn(CF 3 C ⁇ 2)2-
• the process of the present invention is generally carried out at from -100°C to +600°C, preferably from -78°C to +350°C, particularly preferably at from 0°C to 180°C.
• the reaction generally takes place at a pressure of from 10 mbar to 1000 bar, preferably from 0.5 bar to 100 bar.
• the reaction can be carried out in a single-phase system or in a multiphase system.
• the concentration of indanone of the formula I or la in the reaction mixture is generally in the range from 0.0001 mol/1 to 8 mol/1, preferably from 0.01 mol/1 to 3 mol/1, particularly preferably from 0.1 mol/1 to 2 mol/1.
• the molar ratio of coupling component to indanone of the formula I or la is generally from 0.1 to 10, preferably from 0.5 to 3.
• the molar ratio of base to indanone of the formula I or la is generally from 0 to 50.
• the molar ratio of phase transfer catalyst to indanone of the formula I or la is generally from 0 to 2, preferably from 0 to 0.1.
• the molar ratio of salt-like additives to indanone of the formula I or la is generally from 0 to 10.
• the time of the reaction of indanones of the formula I or la with above-described coupling components to give indanones of the formula II or Ila is generally from 5 minutes to 1 week, preferably from 15 minutes to 48 hours.
• the reaction of an indanone of the formula I or la with a boronic acid is preferably carried out under conditions in which the transition metal component used is a compound of a transition metal of groups 8 to 10 of the Periodic Table of the Elements, a base such as an alkoxide, hydroxide, carbonate, carboxylate, hydrogencarbonate, oxide, fluoride, phosphate or amine is used and a solvent such as a hydrocarbon, ether, polyether, alcohol, polyalcohol or water or any mixture of these is used and the reaction temperature is from -100° to 500°C.
• a base such as an alkoxide, hydroxide, carbonate, carboxylate, hydrogencarbonate, oxide, fluoride, phosphate or amine
• a solvent such as a hydrocarbon, ether, polyether, alcohol, polyalcohol or water or any mixture of these is used and the reaction temperature is from -100° to 500°C.
• the transition metal component used is a compound of the transition metals Ni, Pd or Pt
• the base used is an alkoxide, hydroxide, hydrogencarbonate, carbonate, carboxylate or phosphate
• the solvent used is an aromatic hydrocarbon, ether, polyether, alcohol, polyalcohol or water or any mixture of these and the reaction temperature is from -78 to 300°C.
• the transition metal component used is a palladium compound
• the base is an alkali metal or alkaline earth metal alkoxide, hydroxide, carbonate, carboxylate or orthophosphate
• the solvent is toluene, xylene, mesitylene, ethylbenzene, THF, dioxane, DME, diglyme, butanol, ethylene glycol, glycerol or water or any mixture of these and the reaction temperature is from -30° to 200°C.
• the transition metal compound is a palladium compound
• the base is an alkali metal or alkaline earth metal carbonate, hydroxide or orthophosphate
• the solvent is toluene, xylene, THF, DME, diglyme, ethylene glycol or water or any mixture of these and the reaction temperature is from 0°C to 160°C.
• Illustrative examples of reaction conditions in the reaction of. an indanone of the formula I or la with a boronic acid which do not, however, restrict the scope of the invention, are:
• X (in formula I or la) Br; catalyst: 0.01-5 mol% of Pd(P(Ph 3 ) 4 ); base: aqueous sodium carbonate solution; solvent: toluene; reaction temperature: reflux; reaction time: 1-24 h.
• X (in formula I or la) I or trifluoromethanesulfonate; catalyst: 0.01-1 mol% of PdCl 2 (NC-Ph) 2 ; base: sodium carbonate; solvent: DME; additive: 5 mol% of tetrabutylammonium bromide; reaction temperature: reflux; reaction time: 1-24 h.
• R 3 is preferably an aryl, heteroaryl or alkenyl group
• the transition metal compound is a compound of a transition metal of groups 8-10 of the Periodic Table of the Elements
• the solvent is a hydrocarbon, ether, polyether, amide or nitrile
• the additive is a lithium salt, a zinc salt, a copper salt, a silver salt or a fluoride salt and the reaction temperature is from -78°C to 300°C and the reaction time is from 5 minutes to 1 week.
• R 3 is preferably an aryl, heteroaryl (with the heteroatoms N, 0 and S) or alkenyl group, and in which the transition metal component is a palladium compound, the solvent is an aromatic hydrocarbon, ether, THF, dioxane, DME,
• reaction temperature is from -30 to 200°C and the reaction time is from 10 minutes to 48 hours.
• reaction conditions in the reaction of an indanone of the formula I or la with a stannane which do not, however, restrict the scope of the invention, are:
• X (in formula I or la) Br; catalyst: 0.5-10 mol% of Pd(OAc) / P(o-tolyl) 3 ; solvent: xylene; additive: Cul; temperature: 135°C; 10 reaction time: 3-6 h.
• reaction of an indanone of the formula I and la with an olefin is preferably carried out under conditions in which the transition metal component is a compound of a transition metal of 15 groups 8-10 of the Period Table of the Elements, the base is an amine or carboxylate, the solvent is an amide, amine, urea, nitrile, alcohol or water and the reaction temperature is from -78 to 250°C.
• the transition metal component is a compound of a transition metal of 15 groups 8-10 of the Period Table of the Elements
• the base is an amine or carboxylate
• the solvent is an amide, amine, urea, nitrile, alcohol or water
• the reaction temperature is from -78 to 250°C.
• the transition metal component is a palladium compound
• the base is a tertiary amine, carboxylate or DBU
• the solvent is an amide, nitrile or alcohol and the reaction temperature is from 0 to 200°C.
• X (in formula I or la) trifluoromethanesulfonate; olefin: methyl methacrylate; catalyst: 0.01-5 mol% of Pd/C/PPh 3 ; base: diisopropylethylamine; solvent: dimethylacetamide; temperature:
• X (in formula I or la) Cl; olefin: acrylonitrile; catalyst: 0.01-1 mol% of [ (o-tolyl) 2 P-(o-benzyl)Pd] 2 (OAc) 2 ; base: sodium acetate; solvent: acetonitrile; temperature: 100°C.
• the present invention also provides substituted indanones of the formula III,
• R 1 ' is a C ⁇ -C 4 o ⁇ hydrocarbon group which is bound via a carbon atom and may bear one or more identical or different heteroatom- containing radicals, except for nitrogen-containing radicals, as substituents, eg. a linear, branched or cyclic C ⁇ -C 2 o-alkyl group which may bear one or more identical or different halogen, OH, OR 2 , SR 2 , PR 2 2 ⁇ , -SiR 2 3 or -OSiR 2 3 substituents, a C 6 -C 2 2-aryl group which may bear one or more identical or different halogen, OH, OR 2 , SR 2 , PR 2 2 -, -SiR 2 3 or -OSiR 2 3 substituents, a C 7 -C 2 o-alkylaryl group or a C 7 -C 2 o ⁇ arylalkyl group, where the alkyl part may bear one or more identical or different halogen, OH, OR
• alkenyl part may bear one or more identical or different halogen, OH, OR 2 , SR 2 , PR 2 2 -, -SiR 2 3 or -OSiR 2 3 substituents and the aryl part may bear one or more identical or different halogen, OH, OR 2 , SR 2 , PR 2 2 -, -SiR 2 3 or -OSiR 2 3 substituents, or
• R 1 ' is an OR 2 , SR 2 , NR 2 2 , PR 2 2 , SiR 2 3 or OSiR 2 3 group, where R 2 are identical or different and are each a C ⁇ -C 2 o-hydrocarbon group such as a C ⁇ -C ⁇ o ⁇ alkyl or C 6 -C 14 -aryl group which may each bear one or more identical or different halogen, OH, OR 2 , SR 2 , NR 2 2 -, PR 2 2 ⁇ , -SiR 2 3 or -OSiR 2 3 substituents, or two radicals R 2 may be joined to form a ring system or
• R 1 ' is a C ⁇ -C 2 o-» preferably C -C2o-heterocyclic group which is bound via a carbon atom and may in turn bear C ⁇ -C 2 o-radicals or heteroatoms as substituents,
• X' is a leaving group, preferably a diazonium group, a halogen atom such as chlorine, bromine or iodine, or C ⁇ -C 4 o ⁇ alkyl- sulfonate, C ⁇ -C 4 o-haloalkylsulfonate, C 6 -C 4 rj-arylsulfonate, c 6 -C 4 o-haloarylsulfonate, C -C 4 o-arylalkylsulfonate, C-C 4 o ⁇ halo- arylalkylsulfonate, C ⁇ -C 4 o-alkylcarboxylate, C ⁇ -Co-haloalkyl- carboxylate, C 6 -C 4 rj-arylcarboxylate, C 6 -C 4 o-haloarylcarboxylate, C 7 -Co-arylalkylcarboxylate, C 7 -C 4 o-haloarylalky
• Y 7 and Y 8 are identical or different and are each a hydrogen atom or are as defined for X' or are a C 2 -C 4 o-hydrocarbon group which is bound via a carbon atom and may bear one or more identical or different heteroatom-containing radicals as substituents, eg.
• a linear, branched or cyclic C 2 -C 2 o-alkyl group which may bear one or more identical or different halogen, OH, OR 2 , SR 2 , NR 2 2 -, PR 2 2 -f -SiR 2 3 or -OSiR 2 3 substituents, a C 6 -C 22 -aryl group which may bear one or more identical or different halogen, OR 2 , SR 2 , NR 2 2 ⁇ , H 2 , -N 2 H 3 , N0 2 , CN, C0 2 R 2 , CHO, COR 2 , PR 2 2 -, -SiR 2 3 or -OSiR 2 3 substituents, a C 7 -C ⁇ 5 -alkylaryl group or C 7 -C ⁇ s-arylalkyl group, where the alkyl part may bear one or more identical or different halogen, OH, OR 2 , SR 2 , NR 2 2 -, PR 2
• a C ⁇ -C ⁇ o ⁇ alkyl group or C6-C 14 -aryl group which may bear one or more identical or different halogen, OH, OR 2 , SR 2 , NR 2 2 -, PR 2 2 - # -SiR 2 3 or -OSiR 2 3 substituents, or two radicals R 2 may be joined to form a ring system, or Y 7 and Y 8 are each a C ⁇ -C 2 o-heterocyclic group which is bound via a carbon atom and may in turn bear C ⁇ -C 2 o ⁇ radicals or heteroatoms as substituents, and in formula III, at least one of the radicals Y 7 and Y 8 , preferably Y 7 , is a hydrogen atom and Y 9 is a hydrogen atom.
• X' is chlorine, bromine, iodine, triflate, nonaflate, mesylate, ethylsulfonate, benzenesulfonate, tosylate, triisopropylbenzene- sulfonate, formate, acetate, trifluoroacetate, nitrobenzoate, halogenated arylcarboxylates , in particular fluorinated benzoate, methyl carbonate, ethyl carbonate, benzyl carbonate, tert-butyl carbonate, dimethyl phosphonate, diethyl phosphonate, diphenyl phosphonate or diazonium,
• R 1 ' is a linear, branched or cyclic C ⁇ -Ce-alkyl group which may bear one or more identical or different fluorine, chlorine, OR 2 , -SiR 2 3 or -OSiR 2 3 substituents, a C 6 -C ⁇ o ⁇ aryl group which may bear one or more identical or different fluorine, chlorine, OR 2 , SR 2 , -SiR 2 3 or -OSiR 2 3 substituents, a C 7 -C ⁇ 2 ⁇ alkylaryl or arylalkyl group, where the alkyl part may bear one or more identical or different fluorine, chlorine, OR 2 , SR 2 f -SiR 2 3 or -OSiR 2 3 substituents and the aryl part may bear one or more identical or different fluorine, chlorine, OR 2 , SR 2 , -SiR 2 3 or -OSiR 2 3 substituents, a C 2 -C 8 -alkenyl group
• R 1 ' is a C ⁇ -C 2 o-heterocyclic group, where preferred heteroatoms are oxygen and sulfur, which may in turn bear C ⁇ -C 2 o ⁇ hydrocarbon radicals as substituents.
• X' is chlorine, bromine, iodine, triflate or mesylate
• R 1 ' is a linear, branched or cyclic C ⁇ -C ⁇ -alkyl group which may bear one or more fluorine substituents, a C ⁇ -aryl group which may bear one or more identical or different fluorine, chlorine or OR 2 substituents, a C 7 -C ⁇ o-alkylaryl or arylalkyl group, where the alkyl part may bear one or more identical or different fluorine, chlorine or OR 2 substituents and the aryl part may bear one or more identical or different fluorine, chlorine or OR 2 substituents, a C 2 -C 8 -alkenyl group or C 2 -Ca-alkynyl group which may each bear one or more identical or different fluorine or OR 2 substituents, a C 8 -C ⁇ 2 -arylalkenyl group, an OR 2 , SiR 2 3 or -OSiR 2 3 group,
• X' is chlorine, bromine or triflate
• R 1 ' is a linear, branched or cyclic C ⁇ -C 6 -alkyl group, a C 7 -C ⁇ o-alkylaryl or arylalkyl group, a C 2 -C 6 -alkenyl group or C 2 -C ⁇ -alkynyl group or a C 8 -C ⁇ 0 -arylalkenyl group and Y 7 , Y 8 and Y 9 are each a hydrogen atom.
• indanones of the formula I or la can be prepared by methods similar to those known from the literature (eg. US 5,489,712; US 4,070,539; S.J. deSolms et al., J. Med. Chem., 1978, 21, 437).
• an aryl alkyl ketone of the formula (A) can be methylenated and subsequently subjected to a Nazarov cyclization.
• R 1 , X, Y 1 , Y 2 and Y 3 in the formulae A, B and I are as defined above for formula I.
• the methylene group can, for example, be introduced by an aldol condensation with formaldehyde as methylene source or by a Mannich reaction, in which, for example, N,N,N' ,N'-tetramethyldiaminomethane, Eschenmoser' s salt or urotropien/acetic anhydride can be used as methylene source.
• a Mannich reaction in which, for example, N,N,N' ,N'-tetramethyldiaminomethane, Eschenmoser' s salt or urotropien/acetic anhydride can be used as methylene source.
• the aldol condensation is carried out using a formaldehyde source, preferably aqueous formalin solution, and a base, preferably an alkali metal carbonate or alkaline earth metal carbonate or an alkali metal hydroxide or alkaline earth metal hydroxide, particularly preferably an aqueous sodium hydroxide solution, at 0-100°C, preferably 20-60°C.
• a formaldehyde source preferably aqueous formalin solution
• a base preferably an alkali metal carbonate or alkaline earth metal carbonate or an alkali metal hydroxide or alkaline earth metal hydroxide, particularly preferably an aqueous sodium hydroxide solution, at 0-100°C, preferably 20-60°C.
• the molar ratio of base to aryl alkyl ketone is in the range from 0.01 to 5, preferably in the range from 0.1 to 2.
• the molar ratio of formaldehyde to aryl alkyl ketone is in the range from 0.5 to 1.5, preferably in the range from 0.9 to 1.2.
• the concentration of the aryl alkyl ketone in the reaction mixture (total volume) is in the range from 0.01 to 6 mol/1, preferably from 0.1 to 2 mol/1.
• the aryl alkyl ketone can be diluted with inert solvents such as ethers, hydrocarbons or halogenated hydrocarbons .
• the reaction can be carried out in a single-phase or multiphase system. In the case of multiphase reaction mixtures, phase transfer catalysts can be added to accelerate the reaction.
• the reaction time is usually from 15 minutes to 12 hours or longer.
• the reaction can also be carried out in an inert gas atmosphere and the pressure in the reaction vessel can be either below or above atmospheric pressure.
• the subsequent cyclization to form the indanone is carried out by literature methods (J.H. Burckhalter, R.C. Fuson, J. Amer. Chem. Soc, 1948, 70, 4184; E.D. Thorsett, F.R. Stermitz, Synth. Commun., 1972, 2, 375; Synth. Commun., A. Bhattacharya, B. Segmuller, A. Ybarra, 1996, 26, 1775; U.S. Pat. No. 5,489,712).
• the cyclization is preferably carried out under acid conditions.
• acids such as protic acids (eg. sulfuric acid, polyphosphoric acid, methanesulfonic acid) or Lewis acids (eg.
• the reaction product from the aldol condensation can be diluted with an inert solvent before addition to the cyclization reagent, or can be added in undiluted form.
• X is an oxygen-containing leaving group, for example a triflate group
• the starting materials used are preferably hydroxyindanones, some of which are known from the literature (eg. Bringmann et al., Liebigs Ann. Chem., 1985, 2116-2125), and the hydroxy group is converted by literature methods into an oxygen-containing leaving group X, eg. triflate (eg.: P.J. Stang, Synthesis, 1982, 85; V. Percec, J. Org. Chem., 1995, 60, 176; Autorenkollektiv, Organikum, VEB Deutscher Verlag dermaschineen, 1976).
• the invention further provides substituted indanones of the formula IV
• R 1 " is a C ⁇ -C 40 -group such as a C ⁇ -C 40 -hydrocarbon group which is bound via a carbon atom and may bear one or more identical or different heteroatom-containing radicals as substituents, eg. a linear, branched or cyclic C ⁇ -C 2 o-alkyl group which may bear one or more identical or different halogen, OH, OR 2 , SR 2 NR 2 2 ⁇ , PR 2 2 ⁇ .
• aryl part may bear one or more identical or different halogen, OH, OR 2 , SR 2 NR 2 2 -, PR 2 2-» -SiR 3 or -OSiR 2 3 substituents, or
• R 1 " is an OR 2 , SR 2 , NR 2 2 , PR 2 2 , SiR 2 3 or OSiR 2 3 group, where R 2 are identical or different and are each a C ⁇ -C 2 o-hydrocarbon group such as a C ⁇ -C ⁇ o-alkyl or C 6 -C ⁇ 4 -aryl group which may each bear one or more identical or different halogen, OH, OR 2 , SR 2 NR 2 2 -, PR 2 2 -/ -SiR 2 3 or -OSiR 2 3 substituents, or two radicals R 2 may be joined to form a ring system, or R 1 " is a C ⁇ -C 2 o-heterocyclic group which is bound via a carbon atom and may in turn bear C ⁇ -C 2 o-radicals or heteroatoms as substituents,
• R 3 ' is an unsaturated C 2 -C 40 -group such as an unsaturated C 2 -C 4 o-hydrocarbon group which is bound via a carbon atom and may bear one or more identical or different heteroatom-containing radicals as substituents, eg.
• a C 6 -C 22 ⁇ aryl group which may bear one or more identical or different halogen, OR 2 , SR 2 NR 2 2 ⁇ , NH 2 , -N 2 H 3 , N0 2 , CN, C0 2 R 2 , CHO, COR 2 , PR 2 2 ", -SiR 2 3 or -0SiR 2 3 substituents, a C-C 15 -alkylaryl group or C-C 15 -arylalkyl group, where the alkyl part may bear one or more identical or different halogen, OH, OR 2 , SR 2 NR 2 2 -, PR 2 2 -, -SiR 2 3 or -OSiR 2 3 substituents and the aryl part may bear one or more identical or different halogen, OR 2 , SR 2 NR 2 2 -, NH 2 , -N 2 H 3 , N0 2 , CN, C0 2 R 2 , CHO, PR 2 2
• R 3 ' is fluorine, a PR 2 2 , B(OR 2 ) 2 , SiR 2 3 or SnR 2 3 group, where R 2 are identical or different and are each a C ⁇ -C 2 o-hydrocarbon group, eg.
• a C ⁇ -C 10 -alkyl group or C 6 -C ⁇ 4 -aryl group which may each bear one or more identical or different halogen, OH, OR 2 , SR 2 NR 2 2 -, PR 2 2 -, -SiR 2 3 or -OSiR 2 3 substituents, or two radicals R 2 may be joined to form a ring system, or R 3 ' is a C ⁇ -C 2 o-heterocyclic group which is bound via a carbon atom and may in turn bear C ⁇ -C 2 o-radicals or heteroatoms as substituents , and
• Y 10 and Y 11 are identical or different and are each a hydrogen atom or are as defined for R 3 in formula II, ie. are a C ⁇ -Co-hydrocarbon group which is bound via a carbon atom and may bear one or more identical or different heteroatom- containing radicals as substituents, eg.
• a linear, branched or cyclic C ⁇ -C 2 o-alkyl group which may bear one or more identical or different halogen, OH, OR 2 , SR 2 , NR 2 2 -, PR 2 2 ⁇ , -SiR 2 3 or -OSiR 3 substituents, a C 6 -C 22 -aryl group which may bear one or more identical or different halogen, OR 2 , SR 2 NR 2 2 -, NH 2 , -N 2 H 3 , N0 2 , CN, C0 2 R 2 , CHO, COR 2 , PR 2 2 ⁇ , -SiR 2 3 or -OSiR 2 3 substituents, a
• alkyl part may bear one or more identical or different halogen, OH, OR 2 , SR 2 NR 2 2 -, PR 2 2 ⁇ , -SiR 2 3 or -OSiR 2 3 substituents and the aryl part may bear one or more identical or different halogen, OR 2 , SR 2 NR 2 2 -, NH 2 , -N 2 H 3 , N0 2 , CN, C0 2 R 2 , CHO, PR 2 2 -, -SiR 2 3 or -OSiR 2 3 substituents, a C 2 -C ⁇ o-alkenyl group which may bear one or more identical or different halogen, OH, OR 2 , SR 2 , NR 2 2 ⁇ , PR 2 2 ⁇ , -SiR 2 3 or -OSiR 2 3 substituents, a C 2 -C ⁇ o-alkenyl group which may bear one or more identical or different halogen, OH, OR 2 , SR
• a C ⁇ -C ⁇ 0 -alkyl group or C 6 -C ⁇ 4-aryl group which may each bear one or more identical or different halogen, OH, OR 2 , SR 2 NR 2 2 -, PR 2 2 -/ -SiR 2 3 or -OSiR 2 3 substituents, or two radicals R 2 may be joined to form a ring system, or ⁇ io or Y 11 are each a C ⁇ -C 2 o-heterocyclic group which is bound via a carbon atom and may in turn bear C ⁇ -C 2 o-radicals or heteroatoms as substituents; in formula IV, at least one of the radicals Y 10 and Y 11 , preferably Y 10 , is a hydrogen atom and Y 12 is a hydrogen atom.
• R 1 " is a linear, branched or cyclic C ⁇ -C ⁇ -alkyl group which may bear one or more identical or different fluorine, chlorine, OR 2 , PR 2 2 -, NR 2 2 -, -SiR 2 3 or -OSiR 2 3 substituents, a C 6 -C 10 -aryl group which may bear one or more identical or different fluorine, chlorine, OR 2 , SR 2 , NR 2 2 -, PR 2 2 - / -SiR 2 3 or -OSiR 2 3 substituents, a C-C ⁇ 2 -alkylaryl or arylalkyl group, where the alkyl part may bear one or more identical or different fluorine, chlorine, OR 2 , SR 2 , NR 2 2 -, PR 2 2 - / -SiR 2 3 or -OSiR 2 3 substituents and the aryl part may bear one or more
• R 1 " is a linear, branched or cyclic C ⁇ -C ⁇ -alkyl group which may bear one or more identical or different fluorine, chlorine, OR 2 or R 2 2 substituents, a C ⁇ -C ⁇ o-aryl group which may bear one or more identical or different fluorine, chlorine, OR 2 or NR 2 2 substituents, a C 7 -C 12 -alkylaryl or arylalkyl group, where the alkyl part may bear one or more identical or different fluorine, chlorine, OR 2 or NR 2 2 substituents and the aryl part may bear fluorine, chlorine, OR 2 or NR 2 2 substituents, a C 2 -C ⁇ -alkenyl group or C 2 -C ⁇ -alkynyl group which may each bear one or more identical or different fluorine, chlorine, OR 2 or NR 2 2 substituents, a C 8 -C ⁇ 2 -arylalkenyl group which may bear one or more identical or different fluorine, chlorine,
• R 3 ' is an unsaturated C 2 -C 2 o-group such as a C 6 -C ⁇ 4 -aryl group which may bear fluorine, chlorine, OR 2 , SR 2 , NR 2 2 , H 2 , N0 2/ CN, COR 2 or CO 2 R 2 substituents, a C 7 -C ⁇ s-alkylaryl group or C 7 -C ⁇ 5 -arylalkyl group, where the alkyl part may bear one or more identical or different fluorine, OR 2 , NR 2 2 - or -OSiR 2 3 substituents and the aryl part may bear fluorine, chlorine, OR 2 , SR 2 , NR 2 2 -, NH 2 , N0 2 , CN, COR 2 or C0 2 R 2 substituents, a C 2 -C ⁇ o-alkenyl group which may bear one or more identical or different fluorine, OR 2 , C0 2 R 2 , COR 2 ,
• R 1 " is a linear, branched or cyclic C ⁇ -Cs-alkyl group which may bear one or more identical or different fluorine, OR 2 or 2 2 substituents, a C 6 -aryl group which may bear fluorine, OR 2 or R 2 2 substituents, a C 7 -C 10 -alkylaryl or arylalkyl group, which may each bear fluorine, chlorine, OR 2 or NR 2 2 substituents, a C 2 -C 8 -alkenyl group, a C 2 -C 8 -alkynyl group which may bear fluorine, OR 2 or NR 2 2 substituents, a C ⁇ -Cxo-arylalkenyl group which may bear fluorine, OR 2 or NR 2 2 substituents, an OR 2 , SiR 2 3 or -OSiR 2 3 group, where R 2 are identical or different and are each a C ⁇ -C 4 -alkyl or phenyl group which may bear fluorine
• indanones of the formula IV which do not, however, restrict the scope of the invention, are: 2-methy1-7-phenyl-l-indanone
• indanones of the formulae I and la and also indanones of the formulae II and Ila are suitable, inter alia, as intermediates in the preparation of metallocenes and active compounds in the fields of pharmacy and crop protection.
• indanones of the formulae II and Ila can easily be converted into the indenes of the formulae V and Va by literature methods (eg.: R.C. Larock, Comprehensive Organic Transformations, VCH, 1989, EP 0 629 632 A2).
• Metallocenes can be prepared from the indenes of the formulae V and Va by literature methods (eg. EP 576 970, EP 629 632). Preference is given to unbridged or bridged metallocenes of the formula (VI)
• M is a transition element of group 4, 5 or 6 of the Periodic Table of the Elements, eg. titanium, zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, tungsten, preferably titanium, zirconium, hafnium, particularly preferably zirconium,
• R 9 and R 10 are identical or different and are each a hydrogen atom, hydroxy or a halogen atom or a C ⁇ -C 4 rj-group such as C ⁇ -C 10 -alkyl, C ⁇ -C 10 -alkoxy, C 6 -C 10 -aryl, C 6 -C 10 -aryloxy, C ⁇ -Cio-alkenyl, C 7 -C 40 -arylalkyl, C 7 -C 40 -alkylaryl, C 8 -C 4 o-aryl- alkenyl, preferably hydrogen, C ⁇ -C 3 -alkyl, in particular methyl, C ⁇ -C 3 -alkoxy, C 6 -aryl, C 6 -aryloxy, C 2 -C ⁇ o-alkenyl, C 7 -C ⁇ 0 -arylalkyl, C 7 -C ⁇ o-alkylaryl, C ⁇ -Cio-arylalkenyl or a halogen
• R 11 is a bridge such as
• M 2 is carbon, silicon, germanium or tin, preferably silicon or carbon, in particular silicon
• p is 1, 2 or 3, preferably 1 or 2
• R 12 and R 13 are identical or different and are each a hydrogen atom, a halogen atom or a C ⁇ -C 2 o-group such as C ⁇ -C 20 -alkyl, C 6 -Ci 4 -aryl, C ⁇ -C ⁇ 0 -alkoxy, C 2 -C ⁇ 0 -alkenyl, C 7 -C 20 -arylalkyl, C 7 -C 2 o-alkylaryl, C 6 -C 10 -aryloxy, C ⁇ -C ⁇ 0 -fluoroalkyl, C 6 -C ⁇ 0 -haloaryl or C 2 -C ⁇ 0 -alkynyl or
• R 12 and R 13 together with the atom connecting them form a ring; preferably, R 12 and R 13 are hydrogen, C ⁇ -C 6 -alkyl, C 5 -C 10 -aryl, C ⁇ -C 6 -alkoxy, C 2 -C 4 -alkenyl, C 7 -C ⁇ 0 -arylalkyl, C 7 -C ⁇ 0 -alkylaryl, particularly preferably C ⁇ -C 6 -alkyl or C 6 -C 10 -aryl, or R 12 and R 13 together with the atom connecting them form a ring.
• R 3 are identical or different, preferably identical, and are preferably each a C 6 -C 4 o- ryl group which may contain heteroatoms. Preference is given to C 6 -C 4 o- ryl groups which may be halogenated, in particular fluorinated, or may bear halogenated, in particular fluorinated, C ⁇ -C 20 -hydrocarbon radicals.
• R 3 are particularly preferably each a phenyl, naphthyl, phenanthryl or anthracenyl group which is fluorinated and/or bears fluorinated, in particular perfluorinated, C ⁇ -C ⁇ 0 -hydrocarbon radicals such as CF 3 or C 2 F 5 .
• Particularly suitable metallocenes of the formula VI comprise the following molecular fragments:
• R 1 linear C ⁇ -C ⁇ o-alkyl
• Y 4 , Y 5 , Y 6 hydrogen 3 : 4- (C 4 -C 8 -alkyl) phenyl, where the 4- (C 4 -C 8 -alkyl) group is preferably a branched C 4 -C ⁇ -alkyl group, in particular a tert-butyl group,
• R 11 dimethylsilyl, diphenylsilyl, methylphenylsilyl.
• metallocene components of the metallocenes of the formula VI are combinations of the following molecular fragments:
• R 1 C ⁇ -C 4 -alkyl such as methyl, ethyl, isopropyl, n-butyl, sec-butyl , Y 6 : hydrogen Y 4 , Y 5 : hydrogen, C -C 4 -alkyl, C 6 -C 10 -aryl,
• R 3 4-fluorophenyl, 3, 5-difluorophenyl, pentafluorophenyl, 4-trifluoromethylphenyl, 3-trifluoromethylphenyl, 2-trifluoromethylphenyl , 3, 5-ditrifluoromethylphenyl, 2, 6-ditrifluoromethylphenyl, pentatrifluoromethyl- phenyl, 4-pentafluoroethylphenyl, 3-pentafluoroethyl- phenyl, 2-pentafluoroethylphenyl, 3 , 5-dipenta luoro- ethylphenyl, 2 ,6-dipentafluoroethylphenyl, mono-, di-, tri- and tetrafluoronaphthyl, penta(pentafluoroethyl)- phenyl,
• R" dimethylsilanediyl, dimethylgermanediy1, CH 2 -CH 2 ,
• Radicals having the same designation on the two indenyl ligands can be identical to or different from one another.
• metallocenes which can be prepared, which do not, however, restrict the scope of the invention, are:
• ZrCl 2 dimethylsilanediyIbis (2-n-buty1-4-(4-trifluoromethylphenyl)- indenyl)ZrCl2 dimethylsilanediyIbis (2-n-buty1-4-(3, 5-ditrifluoromethylphenyl)- indenyl) ZrCl 2 dimethylsilanediylbis (2-n-buty1-4-(4-pentafluoroethylphenyl)- indenyl) ZrCl ⁇ dimethylsilanediylbis (2-n-butyl-4- (3 , 5-dipentafluoroethylphenyl)- indenyl ) ZrCl2 dimethylsilanediylbis (2-n-buty1-4-(pentafluorophenyl) indenyl) ZrCl 2 dimethylsilanediylbis (2-n-butyl-4-(3 ,5-difluoroph
• ZrCl 2 dimethylsilanediylbis (2-sec-butyl-4-( 4-trifluoromethylphenyl)- indenyl)ZrCl2 dimethylsilanediylbis (2-sec-buty1-4-(3,5-ditrifluoromethy1- phenyl) indenyl)ZrCl 2 dimethylsilanediylbis ( 2-sec-butyl-4- ( 4-pentafluoroethylphenyl)- indenyl)ZrCl 2 dimethylsilanediylbis (2-sec-buty1-4-(3 ,5-dipentafluoroethy1- phenyl) indenyl)ZrCl 2 dimethylsilanediyIbis (2-sec-buty1-4-(pentafluorophenyl)indenyl)-
• ZrCl 2 dimethylsilanediylbis(2-sec-buty1-4-(pentafluoropheny1)indenyl)- ZrCl 2 dimethylsilanediyIbis (2-isobuty1-4-(3, 5-difluorophenyl)indenyl)-
• ZrCl 2 dimethylsilanediylbis 2-isobutyl-4-( 4-trifluoromethylphenyl)- indenyl)ZrCl2 dimethylsilanediylbis(2-isobutyl-4-( 3, 5-ditrifluoromethylphenyl)- indenyl)ZrCl2 dimethylsilanediylbis ( 2-isobutyl-4-( 4-pentafluoroethylphenyl)- indenyl)ZrCl 2 dimethylsilanediylbis (2-isobutyl-4-( 3, 5-dipentafluoroethy1- phenyl) indenyl) ZrCl 2 dimethylsilanediylbis (2-isobuty1-4-(pentafluoropheny1) indenyl)- ZrCl 2 dimethylsilanediylbis ( 2 ethy1-4-( 3 , 5-difluorophenyl)
• corresponding dimethylzirconium compounds and the corresponding compounds having a l,2-( 1-methylethane- diyl), l,2-(l,l-dimethylethanediyl) or 1 ,2-( 1 ,2-dimethylethane- diyl) bridge.
• titanocenes and hafnocenes corresponding to the zirconocenes listed above.
• the metallocenes which can be prepared from indanones via indenes are highly active catalyst components for olefin polymerization. Depending on the substitution pattern of the ligands, the metallocenes can be formed as a mixture of isomers. For the polymerization, the metallocenes are preferably used in isomerically pure form. The use of the racemate is sufficient in most cases.
• the present invention therefore also provides a process for preparing a polyolefin by polymerization of at least one olefin in the presence of a catalyst comprising at least one cocatalyst and at least one stereorigid metallocene compound of the formula I.
• a catalyst comprising at least one cocatalyst and at least one stereorigid metallocene compound of the formula I.
• polymerization encompasses both homopolymerization and copolymerization.
• R ⁇ and RP are identical or different and are each a hydrogen atom or a hydrocarbon radical having from 1 to 20 carbon atoms, in particular from 1 to 10 carbon atoms, and R ⁇ and R ⁇ together with the atoms connecting them may form one or more rings.
• olefins examples include 1-olefins having from 2 to 40 carbon atoms, preferably 2-10 carbon atoms, for example ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 4-methyl-l-pentene or 1-octene, styrene, dienes such as 1,3-butadiene, isoprene, 1, 4-hexadiene or cyclic olefins such as norbornene or ethylidenenorbornene.
• cyclic olefins such as norbornene and/or one or more acyclic 1-olefins having from 3 to 20 carbon atoms, eg. propylene, and/or one or more dienes having from 4 to 20 carbon atoms, eg. 1,3-butadiene or 1,4-hexadiene.
• dienes having from 4 to 20 carbon atoms, eg. 1,3-butadiene or 1,4-hexadiene.
• copolymers are ethylene-norbornene copolymers, ethylene-propylene copolymers and ethylene-propylene-l,4-hexadiene copolymers.
• the polymerization is preferably carried out at from -60 to 250°C, particularly preferably from 50 to 200°C.
• the pressure is preferably from 0.5 to 2000 bar, particularly preferably from 5 to 64 bar.
• the polymerization can be carried out in solution, in bulk, in suspension or in the gas phase, continuously or batchwise, in one or more stages.
• Preferred embodiments are gas-phase and solution polymerization.
• the catalyst used in the process of the present invention preferably comprises one metallocene compound. It is also possible to use mixtures of two or more metallocene compounds, eg. for preparing polyolefins having a broad or multimodal molar mass distribution.
• suitable cocatalysts for the process of the present invention are all compounds which, owing to their Lewis acidity, can convert the neutral metallocene into a cation and stabilize the latter ("labile coordination"). Furthermore, the catalyst or the anion formed therefrom should undergo no further reactions with the metallocene cation formed (EP 427 697).
• the cocatalyst used is preferably an aluminum compound and/or a boron compound.
• the boron compound preferably has the formula R a x NH 4 _ ⁇ BR b 4 , R a x PH 4 _ ⁇ BR b 4 , R a 3 CBR b 4 or BR b 3 , where x is from 1 to 4, preferably 3, the radicals R a are identical or different, preferably identical, and are C ⁇ -C ⁇ o-alkyl or C 8 -C ⁇ 8 -aryl or two radicals R together with the atoms connecting them form a ring, and the radicals R b are identical or different, preferably identical, and are C 6 -C 18 -aryl which may be substituted by alkyl, haloalkyl or fluorine.
• R a is ethyl, propyl, butyl or phenyl and R b is phenyl, pentafluorophenyl, 3, 5-bistrifluoromethylphenyl, mesityl, xylyl or tolyl (EP 277 003, EP 277 004 and EP 426 638).
• an aluminum compound such as aluminoxane and/or an aluminum alkyl.
• the cocatalyst used is particularly preferably an aluminoxane, in particular of the formula C for the linear type and/or the formula D for the cyclic type,
• radicals R c are identical or different and are each hydrogen or a C ⁇ -C 2 o ⁇ hydrocarbon group such as a C ⁇ -C 18 -alkyl group, a C 6 -C ⁇ 8 -aryl group or benzyl, and p is an integer from 2 to 50, preferably from 10 to 35.
• the radicals R c are identical and are hydrogen, methyl, isobutyl, phenyl or benzyl, particularly preferably methyl .
• radicals R c are different, they are preferably methyl and hydrogen or alternatively methyl and isobutyl, with hydrogen or isobutyl preferably being present in a numerical proportion of from 0.01 to 40% (of the radicals R c ) .
• the methods of preparing the aluminoxanes are known.
• the precise spatial structure of the aluminoxanes is not known (J. Am. Chem. Soc. (1993) 115, 4971).
• chains and rings are joined to form larger two-dimensional or three-dimensional structures.
• the metallocene compound preactivates with a cocatalyst, in particular an aluminoxane, before use in the polymerization reaction. This significantly increases the polymerization activity.
• the preactivation of the metallocene compound is preferably carried out in solution.
• the metallocene compound is preferably dissolved in a solution of the aluminoxane in an inert hydrocarbon. Suitable inert hydrocarbons are aliphatic or aromatic hydrocarbons. Preference is given to using toluene.
• the concentration of the aluminoxane in the solution is in the range from about 1% by weight to the saturation limit, preferably from 5 to 30% by weight, in each case based on the total amount of solution.
• the metallocene can be used in the same concentration but it is preferably used in an amount of from 10 -4 to 1 mol per mol of aluminoxane.
• the preactivation time is from 5 minutes to 60 hours, preferably from 5 to 60 minutes.
• the preactivation is carried out at from -78 to 100°C, preferably from 0 to 80°C.
• the metallocene compound is preferably employed in a concentration, based on the transition metal, of from 10 -3 to 10 -8 mol, preferably from 10 -4 to 10 -7 mol, of transition metal per dm 3 of solvent or per dm 3 of reactor volume.
• the aluminoxane is preferably used in a concentration of from 10 -6 to 10 _1 mol, preferably from 10 -5 to 10 ⁇ 2 mol, per dm 3 of solvent or per dm 3 of reactor volume.
• the other cocatalysts mentioned are used in approximately equimolar amounts to the metallocene compound. - However, higher concentrations are also possible in principle.
• the aluminoxane can be prepared in various ways by known methods.
• One of the methods is, for example, reacting an aluminum- hydrocarbon compound and/or a hydridoaluminum-hydrocarbon compound with water (gaseous, solid, liquid or bound - for example as water of crystallization) in an inert solvent (for example toluene).
• an inert solvent for example toluene.
• an aluminoxane having different radicals R c for example, two different aluminum trialkyls corresponding to the desired composition are reacted with water.
• a purification step using an aluminum compound preferably an aluminum alkyl such as trimethylaluminum or triethylaluminum, is advantageous.
• This purification can be carried out either in the polymerization system itself or the olefin is brought into contact with the aluminum compound and subsequently separated off again before addition to the polymerization system.
• hydrogen can be added in the process of the present invention. This makes it possible to obtain low molecular weight polyolefins such as waxes.
• the metallocene compound is preferably reacted with the cocatalyst outside the polymerization reactor in a separate step using a suitable solvent.
• the catalyst can be applied to a support.
• a prepolymerization can be carried out by means of the metallocene compound.
• the prepolymerization is preferably carried out using the (or one of the) olefin(s) used in the polymerization.
• the catalyst used in the process of the present invention can be supported.
• the application to a support enables, for example, the particle morphology of the polyolefin prepared to be controlled.
• the metallocene compound can be reacted first with the support and subsequently with the cocatalyst.
• the cocatalyst can also be supported first and subsequently reacted with the metallocene compound. It is also possible to apply the reaction product of metallocene compound and cocatalyst to a support.
• Suitable support materials are, for example, silica gels, aluminum oxides, solid aluminoxane or other inorganic support materials such as magnesium chloride.
• Another suitable support material is a polyolefin powder in finely divided form.
• the supported cocatalyst can be prepared, for example, as described in EP 567 952.
• the cocatalyst eg. aluminoxane
• a 5 support such as silica gels, aluminum oxides, solid aluminoxane, other inorganic support materials or else a polyolefin powder in finely divided form and then reacted with the metallocene.
• oxides which have 10 been produced flame-pyrolytically by combustion of element halides in a hydrogen/oxygen flame or can be prepared as silica gels having particular particle size distributions and particle shapes .
• the preparation of the supported cocatalyst can be carried out, for example, as described in EP 578 838 in the following manner in a stainless steel reactor having an explosion-proof design with a pumped circulation system and a pressure rating of 60 bar, with inert gas supply, temperature control by means of jacket
• the pumped circulation system draws in the reactor contents via a connection in the bottom of the reactor by means of a pump and pushes it into a mixer and through a riser line via a heat exchanger back into the reactor.
• 25 mixer is configured such that in the inlet there is located a constricted tube cross section where the flow velocity is increased and into the turbulence zone of which there is introduced, axially and opposite to the flow direction, a thin feed line through which, pulsed, a defined amount of water under
• the supported cocatalyst prepared in this way is used as a 10% strength suspension in n-decane.
• the aluminum content is
• the metallocene of the present invention is then applied to the supported cocatalyst by stirring the dissolved metallocene with the supported cocatalyst.
• the solvent is removed and replaced by a hydrocarbon in which both cocatalyst and the metallocene are insoluble.
• the reaction to form the supported catalyst system is carried out at from -20 to +120°C, preferably from 0 to 100°C, particularly preferably from 15 to 40°C.
• the metallocene is reacted with the supported cocatalyst by combining the cocatalyst as a suspension having a concentration of from 1 to 40% by weight, preferably from 5 to 20% by weight, in an aliphatic, inert suspension medium such as n-decane, hexane, heptane or diesel oil with a solution of the metallocene in an inert solvent such as toluene, hexane, heptane or dichloromethane or with the finely milled solid metallocene.
• a solution of the metallocene can also be reacted with the solid cocatalyst.
• the reaction is carried out by intensive mixing, for example by stirring, at a molar Al/M 1 ratio of from 100/1 to 10,000/1, preferably from 100/1 to 3000/1, and a reaction time of from 5 to 120 minutes, preferably from 10 to 60 minutes, particularly preferably from 10 to 30 minutes, under inert conditions.
• a reaction time for preparing the supported catalyst system particularly when using the metallocenes of the present invention having absorption maxima in the visible region, changes occur in the color of the reaction mixture and these enable the progress of the reaction to be followed.
• the supernatant solution is separated off, for example by filtration or decantation.
• the remaining solid is washed from 1 to 5 times with an inert suspension medium such as toluene, n-decane, hexane, diesel oil or dichloromethane to remove soluble constituents in the catalyst formed, in particular to remove unreacted and therefore soluble metallocene .
• the supported catalyst system prepared in this way can be resuspended as vacuum-dried powder or while still moist with solvent and metered into the polymerization system as a suspension in one of the abovementioned inert suspension media.
• the polymerization is carried out as a suspension or solution polymerization, an inert solvent customary for the Ziegler low-pressure process is used.
• the polymerization is carried out in an aliphatic or cycloaliphatic hydrocarbon, for example propane, butane, hexane, heptane, isooctane, cyclohexane or methylcyclohexane. It is also possible to use a petroleum or hydrogenated diesel oil fraction. Toluene can also be used. Preference is given to carrying out the polymerization in the liquid monomer.
• the supported catalyst system comprising the metallocene of the present invention and a supported cocatalyst
• another aluminum alkyl compound such as trimethylaluminum, triethylaluminum, triisobutylaluminum, trioctylaluminum or isoprenylaluminum into the reactor to make the polymerization system inert (for example to remove catalyst poisons present in the olefin) .
• This is added to the polymerization system in a concentration of from 100 to 0.01 mmol of Al per kg of reactor contents.
• TMSC1 trimethyIsilyl chloride triflate trifluoromethanesulfonate triglyme triethylene glycol dimethyl ether
• the methylene chloride solution was added while stirring to 400 g of hot (65°C) concentrated sulfuric acid over a period of 2.25 hours. The methylene chloride distilled off during this procedure. After the addition was complete, stirring was continued for another 0.5 hour at 65°C.
• the cool sulfuric acid solution was slowly added to an ice-cold mixture of 325 ml of methylene chloride and 325 ml of water. The phases were separated, the sulfuric acid solution was extracted twice with 250 ml each time of methylene chloride, the combined organic phases were washed with 200 ml of saturated sodium hydrogencarbonate solution, 200 ml of water and 200 ml of saturated sodium chloride solution and dried over magnesium sulfate. After removal of the solvent, the brown liquid was distilled via a 10 cm Vigreux column with column head under a full oil pump vacuum. This gave 39.6 g of (1) as a pale yellow liquid which slowly crystallized.
• reaction mixture was stirred for 16 hours at 20°C, subsequently diluted with 750 ml of ether, the precipitated pyridinium salt was filtered off, the ether phase was washed twice with 100 ml each time of 2N hydrochloric acid, twice with 100 ml each time of water and once with 200 ml of saturated sodium chloride solution and dried over magnesium sulfate. After removal of the solvent, the residue was chromatographed on silica gel using heptane/ethyl acetate (9:1). 27.1 g of (3) were obtained.
• reaction mixture 25 glycol/5 ml of water in the reaction vessel, the mixture was degassed a number of times and saturated with argon. After addition of 18 mg (0.09 mmol) of palladium acetate and 0.15 g (0.27 mmol) of TMSPP, the reaction mixture was stirred for 2 hours at 125°C. After addition of 60 ml of water, the aqueous
• the dilithium salt was added at -78°C to a suspension of 3.2 g (14 mmol) of zirconium tetrachloride in 80 ml of methylene chloride and, while stirring, warmed to room temperature over a period of 18 hours.
• the mixture was filtered on a G3 frit and the residue was extracted with a total of 400 ml of methylene chloride added a little at a time.
• the combined filtrates were very largely freed of solvent under reduced pressure.
• the crystals which precipitated from methylene chloride were isolated. This gave 1.5 g of (58) having a racemate:meso ratio of 1:1. Recrystallization from methylene chloride gave the racemic complex in the form of yellow crystals.

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