US20020052520A1 - Preparation of organosilanes - Google Patents
Preparation of organosilanes Download PDFInfo
- Publication number
- US20020052520A1 US20020052520A1 US09/966,822 US96682201A US2002052520A1 US 20020052520 A1 US20020052520 A1 US 20020052520A1 US 96682201 A US96682201 A US 96682201A US 2002052520 A1 US2002052520 A1 US 2002052520A1
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- United States
- Prior art keywords
- diene
- formula
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- catalyst
- independently
- Prior art date
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- 150000001282 organosilanes Chemical class 0.000 title description 2
- 150000001993 dienes Chemical class 0.000 claims abstract description 29
- 239000003054 catalyst Substances 0.000 claims abstract description 22
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910000077 silane Inorganic materials 0.000 claims abstract description 8
- 150000002504 iridium compounds Chemical class 0.000 claims abstract description 5
- 150000001336 alkenes Chemical class 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 25
- -1 radicals hydrogen Chemical class 0.000 claims description 17
- VYXHVRARDIDEHS-UHFFFAOYSA-N 1,5-cyclooctadiene Chemical compound C1CC=CCCC=C1 VYXHVRARDIDEHS-UHFFFAOYSA-N 0.000 claims description 13
- 239000004912 1,5-cyclooctadiene Substances 0.000 claims description 13
- 239000004215 Carbon black (E152) Substances 0.000 claims description 10
- 229910052801 chlorine Inorganic materials 0.000 claims description 10
- 125000004432 carbon atom Chemical group C* 0.000 claims description 7
- 229910052731 fluorine Inorganic materials 0.000 claims description 7
- 239000000460 chlorine Substances 0.000 claims description 6
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 6
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 6
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 5
- 239000001257 hydrogen Substances 0.000 claims description 5
- 125000001309 chloro group Chemical group Cl* 0.000 claims description 4
- 125000001424 substituent group Chemical group 0.000 claims description 3
- 125000001153 fluoro group Chemical group F* 0.000 claims description 2
- 125000004122 cyclic group Chemical group 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 13
- 238000004821 distillation Methods 0.000 description 10
- 239000000203 mixture Substances 0.000 description 10
- YGHUUVGIRWMJGE-UHFFFAOYSA-N chlorodimethylsilane Chemical compound C[SiH](C)Cl YGHUUVGIRWMJGE-UHFFFAOYSA-N 0.000 description 6
- OSDWBNJEKMUWAV-UHFFFAOYSA-N Allyl chloride Chemical compound ClCC=C OSDWBNJEKMUWAV-UHFFFAOYSA-N 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- BJLJNLUARMMMLW-UHFFFAOYSA-N chloro-(3-chloropropyl)-dimethylsilane Chemical compound C[Si](C)(Cl)CCCCl BJLJNLUARMMMLW-UHFFFAOYSA-N 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 238000006459 hydrosilylation reaction Methods 0.000 description 4
- 229910052741 iridium Inorganic materials 0.000 description 4
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 4
- 150000003254 radicals Chemical class 0.000 description 4
- 238000010626 work up procedure Methods 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 239000000010 aprotic solvent Substances 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- HXVNBWAKAOHACI-UHFFFAOYSA-N 2,4-dimethyl-3-pentanone Chemical compound CC(C)C(=O)C(C)C HXVNBWAKAOHACI-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 2
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 125000003342 alkenyl group Chemical group 0.000 description 2
- 150000005840 aryl radicals Chemical class 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 125000000753 cycloalkyl group Chemical group 0.000 description 2
- MGNZXYYWBUKAII-UHFFFAOYSA-N cyclohexa-1,3-diene Chemical compound C1CC=CC=C1 MGNZXYYWBUKAII-UHFFFAOYSA-N 0.000 description 2
- WDAXFOBOLVPGLV-UHFFFAOYSA-N ethyl isobutyrate Chemical compound CCOC(=O)C(C)C WDAXFOBOLVPGLV-UHFFFAOYSA-N 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000003446 ligand Substances 0.000 description 2
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- RRKODOZNUZCUBN-CCAGOZQPSA-N (1z,3z)-cycloocta-1,3-diene Chemical compound C1CC\C=C/C=C\C1 RRKODOZNUZCUBN-CCAGOZQPSA-N 0.000 description 1
- DNZZPKYSGRTNGK-PQZOIKATSA-N (1z,4z)-cycloocta-1,4-diene Chemical compound C1C\C=C/C\C=C/C1 DNZZPKYSGRTNGK-PQZOIKATSA-N 0.000 description 1
- AHAREKHAZNPPMI-AATRIKPKSA-N (3e)-hexa-1,3-diene Chemical compound CC\C=C\C=C AHAREKHAZNPPMI-AATRIKPKSA-N 0.000 description 1
- PRBHEGAFLDMLAL-GQCTYLIASA-N (4e)-hexa-1,4-diene Chemical compound C\C=C\CC=C PRBHEGAFLDMLAL-GQCTYLIASA-N 0.000 description 1
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 1
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- PRBHEGAFLDMLAL-UHFFFAOYSA-N 1,5-Hexadiene Natural products CC=CCC=C PRBHEGAFLDMLAL-UHFFFAOYSA-N 0.000 description 1
- HNAGHMKIPMKKBB-UHFFFAOYSA-N 1-benzylpyrrolidine-3-carboxamide Chemical compound C1C(C(=O)N)CCN1CC1=CC=CC=C1 HNAGHMKIPMKKBB-UHFFFAOYSA-N 0.000 description 1
- UHOPWFKONJYLCF-UHFFFAOYSA-N 2-(2-sulfanylethyl)isoindole-1,3-dione Chemical compound C1=CC=C2C(=O)N(CCS)C(=O)C2=C1 UHOPWFKONJYLCF-UHFFFAOYSA-N 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- RJSYPKWVIJGNLO-UHFFFAOYSA-N CCOClOC Chemical compound CCOClOC RJSYPKWVIJGNLO-UHFFFAOYSA-N 0.000 description 1
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 1
- 239000004971 Cross linker Substances 0.000 description 1
- ZAFNJMIOTHYJRJ-UHFFFAOYSA-N Diisopropyl ether Chemical compound CC(C)OC(C)C ZAFNJMIOTHYJRJ-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical group ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 150000001343 alkyl silanes Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- OBNCKNCVKJNDBV-UHFFFAOYSA-N butanoic acid ethyl ester Natural products CCCC(=O)OCC OBNCKNCVKJNDBV-UHFFFAOYSA-N 0.000 description 1
- 229950005499 carbon tetrachloride Drugs 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 description 1
- 229960001701 chloroform Drugs 0.000 description 1
- HGCIXCUEYOPUTN-UHFFFAOYSA-N cis-cyclohexene Natural products C1CCC=CC1 HGCIXCUEYOPUTN-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 150000002367 halogens Chemical group 0.000 description 1
- PYGSKMBEVAICCR-UHFFFAOYSA-N hexa-1,5-diene Chemical compound C=CCCC=C PYGSKMBEVAICCR-UHFFFAOYSA-N 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 125000002950 monocyclic group Chemical group 0.000 description 1
- SJYNFBVQFBRSIB-UHFFFAOYSA-N norbornadiene Chemical compound C1=CC2C=CC1C2 SJYNFBVQFBRSIB-UHFFFAOYSA-N 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000010517 secondary reaction Methods 0.000 description 1
- 150000004756 silanes Chemical class 0.000 description 1
- 239000011877 solvent mixture Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- UBOXGVDOUJQMTN-UHFFFAOYSA-N trichloroethylene Natural products ClCC(Cl)Cl UBOXGVDOUJQMTN-UHFFFAOYSA-N 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0803—Compounds with Si-C or Si-Si linkages
- C07F7/0825—Preparations of compounds not comprising Si-Si or Si-cyano linkages
- C07F7/0827—Syntheses with formation of a Si-C bond
- C07F7/0829—Hydrosilylation reactions
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/12—Organo silicon halides
- C07F7/14—Preparation thereof from optionally substituted halogenated silanes and hydrocarbons hydrosilylation reactions
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
- C07F7/1804—Compounds having Si-O-C linkages
- C07F7/1872—Preparation; Treatments not provided for in C07F7/20
- C07F7/1876—Preparation; Treatments not provided for in C07F7/20 by reactions involving the formation of Si-C linkages
Definitions
- the invention relates to a process for preparing organosilanes by hydrosilylation in the presence of an iridium compound as catalyst and free diene as cocatalyst.
- Substituted alkylsilanes are of tremendous economic importance in many fields. They are used, for example, as adhesion promoters and as crosslinkers.
- Iridium catalysts containing diene ligands are, according to U.S. Pat. No. 4,658,050, used in the hydrosilylation of allyl compounds by means of alkoxy-substituted silanes.
- JP-A-07126271 describes the hydrosilylation of allyl halides using chlorodimethylsilane in the presence of iridium catalysts containing diene ligands. Disadvantages of these processes are either moderate yields, an uneconomically high catalyst concentration and/or a very short catalyst life.
- the invention provides a process for preparing a silane of the formula I
- R 1 , R 2 , and R 3 are each independently a monovalent Si—C-bonded, unsubstituted or halogen-substituted C 1 -C 18 -hydrocarbon radical, a chlorine atom or a C 1 -C 18 -alkoxy radical,
- R 4 , R 5 , and R 6 are each independently a hydrogen atom, a monovalent C 1 -C 18 -hydrocarbon radical which may be unsubstituted or may optionally bear F, Cl, OR, NR′ 2 , CN or NCO atoms/groups as substituents, a chlorine atom, a fluorine atom or a C 1 -C 18 -alkoxy radical, where in each case 2 radicals R 4 , R 5 , R 6 together with the carbon atoms to which they are bound may form a cyclic radical,
- R is a hydrogen atom or a monovalent C 1 -C 18 -hydrocarbon radical and diene is a C 4 -C 50 -hydrocarbon compound which may be unsubstituted or bear F, Cl, OR, NR′ 2 , CN or NCO atoms/groups as substituents and has at least two ethylenic C ⁇ C double bonds.
- the target products of the formula I are typically obtained in yields of from 95% to 98% when using very small amounts of catalyst. Depending on the field of application, work-up by distillation can therefore often be dispensed with.
- C 1 -C 18 -hydrocarbon radicals R 1 , R 2 , R 3 are preferably alkyl, alkenyl, cycloalkyl or aryl radicals.
- R 1 , R 2 , R 3 preferably have not more than 10, in particular not more than 6, carbon atoms.
- R 1 , R 2 , R 3 are preferably linear or branched C 1 -C 6 -alkyl radicals or C 1 -C 6 -alkoxy radicals.
- Preferred halogen substituents are fluorine and chlorine.
- Particularly preferred radicals R 1 , R 2 , R 3 are methyl, ethyl, methoxy, ethoxy, chlorine, phenyl and vinyl.
- Hydrocarbon radicals R 4 , R 5 , R 6 are preferably alkyl, alkenyl, acycloalkyl or aryl radicals. It is preferred that not more than one of R 4 , R 5 , R 6 is an alkoxy radical. R 5 , R 6 preferably have not more than 10, in particular not more than 6, carbon atoms. R 5 , R 6 are preferably linear or branched C 1 -C 6 -alkyl radicals or C 1 -C 6 -alkoxy radicals. Particularly preferred radicals R 5 , R 6 are hydrogen, methyl, ethyl, chlorine and phenyl.
- the hydrocarbon radical R 4 preferably has not more than 6, in particular not more than 2, carbon atoms.
- Particularly preferred radicals R 4 are hydrogen, methyl, and ethyl.
- the hydrocarbon radical R preferably has not more than 6, in particular not more than 2, carbon atoms.
- the hydrocarbon compounds used as diene may comprise not only molecular units containing the ethylenic C ⁇ C double bonds, but may also comprise alkyl, cycloalkyl or aryl units.
- the dienes preferably have from 6 to 12 carbon atoms. Preference is given to monocyclic or bicyclic dienes. Preferred examples of dienes are butadiene, 1,3-hexadiene, 1,4-hexadiene, 1,5-hexadiene, isoprene, 1,3-cyclohexadiene, 1,3-cyclooctadiene, 1,4-cyclooctadiene, 1,5-cyclooctadiene and norbornadiene.
- the diene in the catalyst of the formula IV and the free diene serving as cocatalyst can be identical or different. Preference is given to the two dienes being identical.
- the catalyst of the formula IV used is [(cycloocta-1c, 5c-diene)IrCl] 2 and the cocatalyst used is 1,5-cyclooctadiene.
- the silane component of the formula II is preferably used in an excess of from 0.01 to 100 mol % of II, more preferably from 0.1 to 10 mol %, based on the alkene of the formula III.
- the iridium compound of the formula IV is preferably present in a concentration of from 5 to 250 ppm, in particular from 10 to 50 ppm, based on all components present in the reaction mixture.
- the diene as cocatalyst is preferably added in a concentration of from 50 to 2500 ppm, in particular from 50 to 1000 ppm, based on all components present in the reaction mixture.
- the process can be carried out in the presence or absence of aprotic solvents.
- aprotic solvents solvents or solvent mixtures having a boiling point or boiling range up to 120° C. at 0.1 MPa are preferred.
- solvents are ethers such as dioxane, tetrahydrofuran, diethyl ether, diisopropyl ether, and diethylene glycol dimethyl ether; chlorinated hydrocarbons such as dichloromethane, trichloromethane, tetrachloromethane, 1,2-dichloroethane, and trichloroethylene; hydrocarbons such as pentane, n-hexane, hexane isomer mixtures, heptane, octane, naphtha, petroleum ether, benzene, toluene, and xylene(s); ketones such as acetone, methyl ethyl ketone, diiso
- the target product of the formula I can also be used as an aprotic solvent in the process.
- This process variant is preferred.
- the reaction components of the formula II together with the iridium catalyst of the formula IV and optionally the diene are placed in a reaction vessel and the reaction component of the formula III, optionally in admixture with the diene, is introduced while stirring.
- the target product of the formula I together with the catalyst of the formula IV and optionally diene are placed in a reaction vessel and a mixture of components II, III and optionally diene is introduced.
- the reaction time to be employed is preferably from 10 to 2000 minutes.
- the reaction is preferably carried out at a temperature of from 0 to 300° C., in particular from 20 to 200° C.
- the use of superatmospheric pressure may also be useful; the pressure is preferably up to 100 bar.
- diene also allows a plurality of reactions to be carried out without further addition of catalyst. Preference is given to adding further amounts of diene as cocatalyst as the reaction proceeds, in particular, in a continuous manner.
- Example 1 The procedure of Example 1 was used, but without addition of 1,5-cyclooctadiene. Even after a reaction time of 24 hours, no measurable reaction was found (NMR).
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Catalysts (AREA)
Abstract
Description
- 1. Field of the Invention
- The invention relates to a process for preparing organosilanes by hydrosilylation in the presence of an iridium compound as catalyst and free diene as cocatalyst.
- 2. Background Art
- Substituted alkylsilanes are of tremendous economic importance in many fields. They are used, for example, as adhesion promoters and as crosslinkers.
- The platinum- or rhodium-catalyzed hydrosilylation of unsaturated compounds has been widely studied in the past. The product yields are often very low, being only 20-45%, which is attributable to considerable secondary reactions.
- Iridium catalysts containing diene ligands are, according to U.S. Pat. No. 4,658,050, used in the hydrosilylation of allyl compounds by means of alkoxy-substituted silanes. JP-A-07126271 describes the hydrosilylation of allyl halides using chlorodimethylsilane in the presence of iridium catalysts containing diene ligands. Disadvantages of these processes are either moderate yields, an uneconomically high catalyst concentration and/or a very short catalyst life.
- It is an object of the invention to develop a catalyst system which has a long life, which ensures high product yields and purities when using very small amounts of catalyst, and which further allows both continuous and batchwise operation.
- The invention provides a process for preparing a silane of the formula I
- R6R5CH-R4CH—SiR1R2R3 (I),
- which comprises reacting a silane of the formula II
- HSiR1R2R3 (II),
- with an alkene of the formula III
- R6R5CH═CHR4 (III),
- in the presence of an iridium compound of the formula IV as catalyst
- [(diene)IrCl]2 (IV),
- and free diene as cocatalyst, where
- R1, R2, and R3 are each independently a monovalent Si—C-bonded, unsubstituted or halogen-substituted C1-C18-hydrocarbon radical, a chlorine atom or a C1-C18-alkoxy radical,
- R4, R5, and R6 are each independently a hydrogen atom, a monovalent C1-C18-hydrocarbon radical which may be unsubstituted or may optionally bear F, Cl, OR, NR′2, CN or NCO atoms/groups as substituents, a chlorine atom, a fluorine atom or a C1-C18-alkoxy radical, where in each case 2 radicals R4, R5, R6 together with the carbon atoms to which they are bound may form a cyclic radical,
- R is a hydrogen atom or a monovalent C1-C18-hydrocarbon radical and diene is a C4-C50-hydrocarbon compound which may be unsubstituted or bear F, Cl, OR, NR′2, CN or NCO atoms/groups as substituents and has at least two ethylenic C═C double bonds.
- In this process, the target products of the formula I are typically obtained in yields of from 95% to 98% when using very small amounts of catalyst. Depending on the field of application, work-up by distillation can therefore often be dispensed with.
- C1-C18-hydrocarbon radicals R1, R2, R3 are preferably alkyl, alkenyl, cycloalkyl or aryl radicals. R1, R2, R3 preferably have not more than 10, in particular not more than 6, carbon atoms. R1, R2, R3 are preferably linear or branched C1-C6-alkyl radicals or C1-C6-alkoxy radicals. Preferred halogen substituents are fluorine and chlorine. Particularly preferred radicals R1, R2, R3 are methyl, ethyl, methoxy, ethoxy, chlorine, phenyl and vinyl.
- Hydrocarbon radicals R4, R5, R6 are preferably alkyl, alkenyl, acycloalkyl or aryl radicals. It is preferred that not more than one of R4, R5, R6 is an alkoxy radical. R5, R6 preferably have not more than 10, in particular not more than 6, carbon atoms. R5, R6 are preferably linear or branched C1-C6-alkyl radicals or C1-C6-alkoxy radicals. Particularly preferred radicals R5, R6 are hydrogen, methyl, ethyl, chlorine and phenyl.
- The hydrocarbon radical R4 preferably has not more than 6, in particular not more than 2, carbon atoms. Particularly preferred radicals R4 are hydrogen, methyl, and ethyl.
- The hydrocarbon radical R preferably has not more than 6, in particular not more than 2, carbon atoms.
- The hydrocarbon compounds used as diene may comprise not only molecular units containing the ethylenic C═C double bonds, but may also comprise alkyl, cycloalkyl or aryl units. The dienes preferably have from 6 to 12 carbon atoms. Preference is given to monocyclic or bicyclic dienes. Preferred examples of dienes are butadiene, 1,3-hexadiene, 1,4-hexadiene, 1,5-hexadiene, isoprene, 1,3-cyclohexadiene, 1,3-cyclooctadiene, 1,4-cyclooctadiene, 1,5-cyclooctadiene and norbornadiene.
- The diene in the catalyst of the formula IV and the free diene serving as cocatalyst can be identical or different. Preference is given to the two dienes being identical.
- In a particularly preferred case, the catalyst of the formula IV used is [(cycloocta-1c, 5c-diene)IrCl]2 and the cocatalyst used is 1,5-cyclooctadiene.
- The silane component of the formula II is preferably used in an excess of from 0.01 to 100 mol % of II, more preferably from 0.1 to 10 mol %, based on the alkene of the formula III. The iridium compound of the formula IV is preferably present in a concentration of from 5 to 250 ppm, in particular from 10 to 50 ppm, based on all components present in the reaction mixture. The diene as cocatalyst is preferably added in a concentration of from 50 to 2500 ppm, in particular from 50 to 1000 ppm, based on all components present in the reaction mixture.
- The process can be carried out in the presence or absence of aprotic solvents. If aprotic solvents are used, solvents or solvent mixtures having a boiling point or boiling range up to 120° C. at 0.1 MPa are preferred. Examples of such solvents are ethers such as dioxane, tetrahydrofuran, diethyl ether, diisopropyl ether, and diethylene glycol dimethyl ether; chlorinated hydrocarbons such as dichloromethane, trichloromethane, tetrachloromethane, 1,2-dichloroethane, and trichloroethylene; hydrocarbons such as pentane, n-hexane, hexane isomer mixtures, heptane, octane, naphtha, petroleum ether, benzene, toluene, and xylene(s); ketones such as acetone, methyl ethyl ketone, diisopropyl ketone, and methyl isobutyl ketone (MIBK); esters such as ethyl acetate, butyl acetate, propyl propionate, ethyl butyrate, and ethyl isobutyrate; carbon disulfide; and nitrobenzene, or mixtures of these solvents. This list is exemplary and not limiting.
- The target product of the formula I can also be used as an aprotic solvent in the process. This process variant is preferred. For example, the reaction components of the formula II together with the iridium catalyst of the formula IV and optionally the diene are placed in a reaction vessel and the reaction component of the formula III, optionally in admixture with the diene, is introduced while stirring. In another variant, the target product of the formula I together with the catalyst of the formula IV and optionally diene are placed in a reaction vessel and a mixture of components II, III and optionally diene is introduced. The reaction time to be employed is preferably from 10 to 2000 minutes. The reaction is preferably carried out at a temperature of from 0 to 300° C., in particular from 20 to 200° C. The use of superatmospheric pressure may also be useful; the pressure is preferably up to 100 bar.
- The addition of the diene also allows a plurality of reactions to be carried out without further addition of catalyst. Preference is given to adding further amounts of diene as cocatalyst as the reaction proceeds, in particular, in a continuous manner.
- The meanings of all the symbols in the formulae above are in each case independent of one another. In the following examples, all concentrations and percentages are by weight, all pressures are 0.10 MPa (abs.) and all temperatures are 20° C. unless indicated otherwise.
- 19.2 g (0.25 mol) of allyl chloride, 0.1 g (9.2·10−4 mol) of 1,5-cyclooctadiene and 3.0 mg (4.5·10−6 mol) of di-μ-chlorobis[(cycloocta-1c, 5c-diene)iridium(I)] were placed in a 100 ml three-neck flask provided with a low-temperature condenser, internal thermometer and dropping funnel. At a bath temperature of 37° C., a mixture of 23.7 g (0.25 mol) of chlorodimethylsilane and 0.1 g (9.2·10−4 mol) of 1,5-cyclooctadiene was introduced over a period of 1.5 hours in such a way that the internal temperature did not exceed 45° C. For the post-reaction, the mixture was maintained at a bath temperature of 45° C. for an additional one hour. Work-up by distillation gave 40.8 g of chloro(3-chloropropyl)dimethylsilane, corresponding to a yield of 95% based on the silane.
- The procedure was analogous to that of Example 1. In place of the work-up by distillation, 19.2 g (0.25 mol) of allyl chloride and 0.1 g (9.2·10−4 mol) of 1,5-cyclooctadiene were added to the mixture and a mixture of 23.7 g (0.25 mol) of chlorodimethylsilane and 0.1 g (9.2·10−4 mol) of 1,5-cyclooctadiene was again introduced. The reaction was carried out in a manner analogous to Example 1. The total yield after distillation was 76.2 g (89%).
- 19.2 g (0.25 mol) of allyl chloride and 0.1 g (9.2·10−4 mol) of 1,5-cyclooctadiene were added to the distillation residue from Example 2 and a mixture of 23.7 g (0.25 mol) of chlorodimethylsilane and 0.1 g (9.2·10−4 mol) of 1,5-cyclooctadiene was again introduced. The reaction was carried out in a manner analogous to Example 1. The yield after distillation was 37.0 g (87%).
- The procedure was analogous to that of Example 1. In addition, 10.0 g (0.06 mol) of chloro(3-chloropropyl)dimethylsilane were placed in the reaction flask as solvent. Distillation gave 48.8 g of product. After subtraction of the 10.0 g used, the yield is 38.8 g, corresponding to a percentage yield of 91%.
- Using a batch size as in Example 2, chloro(3-chloropropyl)dimethylsilane, catalyst and 1,5-cyclooctadiene were placed in the reaction flask and a mixture of allyl chloride, chlorodimethylsilane and 1,5-cyclooctadiene was added dropwise. Distillation gave 50.1 g of product. After subtraction of the 10.0 g of desired product employed as solvent, the yield is 40.1 g, corresponding to a percentage yield of 94%.
- 19.2 g (0.25 mol) of allyl chloride and 21.0 mg (3.1·10−5 mol, 125 ppm) of dichlorodicyclopentadieneplatinum(II) were placed in a 100 ml three-neck flask provided with a low-temperature condenser, internal thermometer and dropping funnel. At a bath temperature of 37° C., 23.7 g (0.25 mol) of chlorodimethylsilane were introduced. The mixture was allowed to react further at 50° C. for another 3 hours. Work-up by distillation gave only 18.1 g (42%) of chloro(3-chloropropyl)dimethylsilane.
- The procedure of Example 1 was used, but without addition of 1,5-cyclooctadiene. Even after a reaction time of 24 hours, no measurable reaction was found (NMR).
Claims (18)
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DE10053037.0 | 2000-10-26 | ||
DE10053037 | 2000-10-26 | ||
DE10053037A DE10053037C1 (en) | 2000-10-26 | 2000-10-26 | Preparation of silanes, useful as e.g. adhesion promoters or crosslinkers for polymers, uses dichloro-bis(diene-iridium) compound as catalyst and free diene as cocatalyst in the hydrosilylation of an alkene |
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US6388119B1 US6388119B1 (en) | 2002-05-14 |
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US (1) | US6388119B1 (en) |
EP (1) | EP1201671B1 (en) |
JP (1) | JP3864070B2 (en) |
CN (1) | CN1167705C (en) |
DE (2) | DE10053037C1 (en) |
PL (1) | PL201469B1 (en) |
Cited By (6)
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US20050240043A1 (en) * | 2002-07-18 | 2005-10-27 | Thomas Kornek | Continuous production of organosilanes |
US20070185344A1 (en) * | 2003-06-17 | 2007-08-09 | Rhodia Chimie | Method of preparing halogenoalkyldialkyl chlorosilane |
US20080045737A1 (en) * | 2006-08-21 | 2008-02-21 | Wacker Chemie Ag | Continuous Preparation of Organosilanes |
US20100022793A1 (en) * | 2007-03-07 | 2010-01-28 | Wacker Chemie Ag | Iridium-catalyzed production method for organosilicon compounds |
CZ305369B6 (en) * | 2013-05-02 | 2015-08-19 | Ústav Chemických Procesů Akademie Věd České Republiky | Process for preparing polyfluorinated agent |
EP3909960A1 (en) * | 2020-05-13 | 2021-11-17 | Shin-Etsu Chemical Co., Ltd. | Process for producing dimethylchlorosilane compound |
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JP3856081B2 (en) * | 2000-05-15 | 2006-12-13 | 信越化学工業株式会社 | Method for producing halopropyldimethylchlorosilane compound |
US6605734B2 (en) | 2001-12-07 | 2003-08-12 | Dow Corning Corporation | Alkene-platinum-silyl complexes |
FR2841245B1 (en) * | 2002-06-21 | 2005-02-18 | Rhodia Chimie Sa | PROCESS FOR THE PREPARATION OF ORGANO DIALKYLALCOXYSILANE |
FR2841244B1 (en) * | 2002-06-21 | 2007-10-05 | Rhodia Chimie Sa | PROCESS FOR THE PREPARATION OF ORGANO DIALKYLALCOXYSILANE |
FR2871802B1 (en) * | 2004-06-16 | 2006-07-21 | Rhodia Chimie Sa | PROCESS FOR THE PREPARATION OF OMEGA-HALOGENOALKYL DIALYLHALOGENOSILANE |
EP1805190A1 (en) * | 2004-10-28 | 2007-07-11 | Wacker Chemie AG | Production of organosilanes in the presence of iridium-catalysts and cocatalysts |
WO2009111095A1 (en) * | 2008-03-06 | 2009-09-11 | Dow Corning Corporation | Process for the preparation of haloalkylalkoxysilancs and haloalkylhalosilanes |
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EP2758413B1 (en) * | 2011-09-20 | 2018-03-07 | Dow Corning Corporation | Iridium containing hydrosilylation catalysts and compositions containing the catalysts |
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WO2017100106A1 (en) | 2015-12-07 | 2017-06-15 | Dow Corning Corporation | Method and composition for hydrosilylation of carboxylic acid alkenyl esters and hydrogen terminated organosiloxane oligomers with an iridium complex catalyst |
EP3609900B1 (en) * | 2017-04-11 | 2021-02-17 | Dow Silicones Corporation | Method for preparing arylalkoxysilanes by dehydrogenative silylation |
JP7252142B2 (en) | 2017-06-26 | 2023-04-04 | ダウ シリコーンズ コーポレーション | Method for hydrosilylating aliphatic unsaturated alkoxysilanes and hydrogen-terminated organosiloxane oligomers to prepare alkoxysilyl-terminated polymers useful for functionalizing polyorganosiloxanes using iridium catalysts |
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JP7537354B2 (en) | 2021-04-28 | 2024-08-21 | 信越化学工業株式会社 | Method for producing halosilane compounds |
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US4549018A (en) * | 1981-03-20 | 1985-10-22 | Minnesota Mining And Manufacturing Company | Rhodium-and iridium-nitrogen complex catalysts |
US4658050A (en) * | 1986-03-31 | 1987-04-14 | Union Carbide Corporation | Novel process for the preparation of halopropyltrialkoxysilanes and halopropylalkylalkoxysilanes |
CA2161181A1 (en) * | 1994-10-25 | 1996-04-26 | Frank Kropfgans | Process for the preparation of 3-halo- and -pseudohaloalkylsilane esters |
DE59509258D1 (en) * | 1994-10-25 | 2001-06-21 | Degussa | Process for the preparation of 3-halogen or pseudohalogen alkylsilane esters |
DE69829563T2 (en) * | 1997-07-08 | 2006-04-27 | Kaneka Corp. | HYDROSILYLATION PROCESSES AND POLYMERS MADE BY THE PROCESS |
US6271280B1 (en) * | 2000-04-19 | 2001-08-07 | General Electric Company | Diacetylenic polyorganosiloxanes, intermediates therefor, and cured compositions prepared therefrom |
JP3856081B2 (en) * | 2000-05-15 | 2006-12-13 | 信越化学工業株式会社 | Method for producing halopropyldimethylchlorosilane compound |
-
2000
- 2000-10-26 DE DE10053037A patent/DE10053037C1/en not_active Expired - Fee Related
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2001
- 2001-08-16 DE DE50100948T patent/DE50100948D1/en not_active Expired - Lifetime
- 2001-08-16 EP EP01118869A patent/EP1201671B1/en not_active Expired - Lifetime
- 2001-09-27 US US09/966,822 patent/US6388119B1/en not_active Expired - Lifetime
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Publication number | Priority date | Publication date | Assignee | Title |
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US20050240043A1 (en) * | 2002-07-18 | 2005-10-27 | Thomas Kornek | Continuous production of organosilanes |
US7208618B2 (en) | 2002-07-18 | 2007-04-24 | Wacker Chemie Ag | Continuous production of organosilanes |
US20070185344A1 (en) * | 2003-06-17 | 2007-08-09 | Rhodia Chimie | Method of preparing halogenoalkyldialkyl chlorosilane |
US20080275264A1 (en) * | 2003-06-17 | 2008-11-06 | Rhodia Chimie | Process for the preparation of halogenoalkyldialkyl chlorosilane |
US7884225B2 (en) | 2003-06-17 | 2011-02-08 | Rhodia Chimie | Process for the preparation of halogenoalkyldialkyl chlorosilane |
US20080045737A1 (en) * | 2006-08-21 | 2008-02-21 | Wacker Chemie Ag | Continuous Preparation of Organosilanes |
US20100022793A1 (en) * | 2007-03-07 | 2010-01-28 | Wacker Chemie Ag | Iridium-catalyzed production method for organosilicon compounds |
US7956210B2 (en) | 2007-03-07 | 2011-06-07 | Wacker Chemie Ag | Iridium-catalyzed production method for organosilicon compounds |
CZ305369B6 (en) * | 2013-05-02 | 2015-08-19 | Ústav Chemických Procesů Akademie Věd České Republiky | Process for preparing polyfluorinated agent |
EP3909960A1 (en) * | 2020-05-13 | 2021-11-17 | Shin-Etsu Chemical Co., Ltd. | Process for producing dimethylchlorosilane compound |
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CN1351015A (en) | 2002-05-29 |
PL350308A1 (en) | 2002-05-06 |
JP2002179684A (en) | 2002-06-26 |
EP1201671A1 (en) | 2002-05-02 |
JP3864070B2 (en) | 2006-12-27 |
EP1201671B1 (en) | 2003-11-12 |
DE10053037C1 (en) | 2002-01-17 |
CN1167705C (en) | 2004-09-22 |
DE50100948D1 (en) | 2003-12-18 |
US6388119B1 (en) | 2002-05-14 |
PL201469B1 (en) | 2009-04-30 |
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