US20010007909A1 - Preparation of tris (trimethylsilyl) silylethyl esters - Google Patents
Preparation of tris (trimethylsilyl) silylethyl esters Download PDFInfo
- Publication number
- US20010007909A1 US20010007909A1 US09/754,320 US75432001A US2001007909A1 US 20010007909 A1 US20010007909 A1 US 20010007909A1 US 75432001 A US75432001 A US 75432001A US 2001007909 A1 US2001007909 A1 US 2001007909A1
- Authority
- US
- United States
- Prior art keywords
- trimethylsilyl
- tris
- silyl
- ethyl
- acrylate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- -1 silylethyl esters Chemical class 0.000 title claims abstract description 21
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 title description 5
- 238000002360 preparation method Methods 0.000 title description 3
- 239000007983 Tris buffer Substances 0.000 title 1
- HHVZXGUXWQCHAS-UHFFFAOYSA-N 2-tris(trimethylsilyl)silylethanol Chemical compound C[Si](C)(C)[Si]([Si](C)(C)C)([Si](C)(C)C)CCO HHVZXGUXWQCHAS-UHFFFAOYSA-N 0.000 claims abstract description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000003054 catalyst Substances 0.000 claims abstract description 16
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims abstract description 14
- WNHNIWFZNONMSW-UHFFFAOYSA-N 2-tris(trimethylsilyl)silylethyl acetate Chemical compound CC(=O)OCC[Si]([Si](C)(C)C)([Si](C)(C)C)[Si](C)(C)C WNHNIWFZNONMSW-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 19
- 239000002841 Lewis acid Substances 0.000 claims description 6
- 150000007517 lewis acids Chemical group 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 description 21
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 18
- 239000002904 solvent Substances 0.000 description 14
- 150000001875 compounds Chemical class 0.000 description 12
- CWTCGDAFKOWTEE-UHFFFAOYSA-N 2-tris(trimethylsilyl)silylethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC[Si]([Si](C)(C)C)([Si](C)(C)C)[Si](C)(C)C CWTCGDAFKOWTEE-UHFFFAOYSA-N 0.000 description 11
- ILAHWRKJUDSMFH-UHFFFAOYSA-N boron tribromide Chemical compound BrB(Br)Br ILAHWRKJUDSMFH-UHFFFAOYSA-N 0.000 description 10
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 10
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 9
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 8
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Chemical compound FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- JMXKSZRRTHPKDL-UHFFFAOYSA-N titanium ethoxide Chemical compound [Ti+4].CC[O-].CC[O-].CC[O-].CC[O-] JMXKSZRRTHPKDL-UHFFFAOYSA-N 0.000 description 8
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 8
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 6
- 239000005977 Ethylene Substances 0.000 description 6
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 6
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 6
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 5
- SMZOGRDCAXLAAR-UHFFFAOYSA-N aluminium isopropoxide Chemical compound [Al+3].CC(C)[O-].CC(C)[O-].CC(C)[O-] SMZOGRDCAXLAAR-UHFFFAOYSA-N 0.000 description 5
- 238000009835 boiling Methods 0.000 description 5
- JGFBRKRYDCGYKD-UHFFFAOYSA-N dibutyl(oxo)tin Chemical compound CCCC[Sn](=O)CCCC JGFBRKRYDCGYKD-UHFFFAOYSA-N 0.000 description 5
- YIXBTYPGXFNHPR-UHFFFAOYSA-N 2-tris(trimethylsilyl)silylethyl prop-2-enoate Chemical compound C[Si](C)(C)[Si]([Si](C)(C)C)([Si](C)(C)C)CCOC(=O)C=C YIXBTYPGXFNHPR-UHFFFAOYSA-N 0.000 description 4
- 229910015900 BF3 Inorganic materials 0.000 description 4
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 description 4
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 4
- 229910007161 Si(CH3)3 Inorganic materials 0.000 description 4
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 229910021623 Tin(IV) bromide Inorganic materials 0.000 description 4
- 229910021627 Tin(IV) chloride Inorganic materials 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 4
- DTQVDTLACAAQTR-UHFFFAOYSA-N Trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-N 0.000 description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 4
- JPUHCPXFQIXLMW-UHFFFAOYSA-N aluminium triethoxide Chemical compound CCO[Al](OCC)OCC JPUHCPXFQIXLMW-UHFFFAOYSA-N 0.000 description 4
- RWGFKTVRMDUZSP-UHFFFAOYSA-N cumene Chemical compound CC(C)C1=CC=CC=C1 RWGFKTVRMDUZSP-UHFFFAOYSA-N 0.000 description 4
- RJGHQTVXGKYATR-UHFFFAOYSA-L dibutyl(dichloro)stannane Chemical compound CCCC[Sn](Cl)(Cl)CCCC RJGHQTVXGKYATR-UHFFFAOYSA-L 0.000 description 4
- QSHZUFRQHSINTB-UHFFFAOYSA-L dibutyltin(2+);dibromide Chemical compound CCCC[Sn](Br)(Br)CCCC QSHZUFRQHSINTB-UHFFFAOYSA-L 0.000 description 4
- ZXDVQYBUEVYUCG-UHFFFAOYSA-N dibutyltin(2+);methanolate Chemical compound CCCC[Sn](OC)(OC)CCCC ZXDVQYBUEVYUCG-UHFFFAOYSA-N 0.000 description 4
- 150000002148 esters Chemical group 0.000 description 4
- YQXQWFASZYSARF-UHFFFAOYSA-N methanol;titanium Chemical compound [Ti].OC YQXQWFASZYSARF-UHFFFAOYSA-N 0.000 description 4
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 4
- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Chemical compound [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 description 4
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 4
- LTSUHJWLSNQKIP-UHFFFAOYSA-J tin(iv) bromide Chemical compound Br[Sn](Br)(Br)Br LTSUHJWLSNQKIP-UHFFFAOYSA-J 0.000 description 4
- HPGGPRDJHPYFRM-UHFFFAOYSA-J tin(iv) chloride Chemical compound Cl[Sn](Cl)(Cl)Cl HPGGPRDJHPYFRM-UHFFFAOYSA-J 0.000 description 4
- 235000010215 titanium dioxide Nutrition 0.000 description 4
- UBZYKBZMAMTNKW-UHFFFAOYSA-J titanium tetrabromide Chemical compound Br[Ti](Br)(Br)Br UBZYKBZMAMTNKW-UHFFFAOYSA-J 0.000 description 4
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 4
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 4
- FAQYAMRNWDIXMY-UHFFFAOYSA-N trichloroborane Chemical compound ClB(Cl)Cl FAQYAMRNWDIXMY-UHFFFAOYSA-N 0.000 description 4
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000012043 crude product Substances 0.000 description 3
- 238000004821 distillation Methods 0.000 description 3
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 3
- 239000012280 lithium aluminium hydride Substances 0.000 description 3
- VHRYZQNGTZXDNX-UHFFFAOYSA-N methacryloyl chloride Chemical compound CC(=C)C(Cl)=O VHRYZQNGTZXDNX-UHFFFAOYSA-N 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000011541 reaction mixture Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- LZDKZFUFMNSQCJ-UHFFFAOYSA-N 1,2-diethoxyethane Chemical compound CCOCCOCC LZDKZFUFMNSQCJ-UHFFFAOYSA-N 0.000 description 2
- DURPTKYDGMDSBL-UHFFFAOYSA-N 1-butoxybutane Chemical compound CCCCOCCCC DURPTKYDGMDSBL-UHFFFAOYSA-N 0.000 description 2
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 description 2
- VHYFNPMBLIVWCW-UHFFFAOYSA-N 4-Dimethylaminopyridine Chemical compound CN(C)C1=CC=NC=C1 VHYFNPMBLIVWCW-UHFFFAOYSA-N 0.000 description 2
- DEVXQDKRGJCZMV-UHFFFAOYSA-K Aluminum acetoacetate Chemical compound [Al+3].CC(=O)CC([O-])=O.CC(=O)CC([O-])=O.CC(=O)CC([O-])=O DEVXQDKRGJCZMV-UHFFFAOYSA-K 0.000 description 2
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 2
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 2
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 2
- HDYRYUINDGQKMC-UHFFFAOYSA-M acetyloxyaluminum;dihydrate Chemical compound O.O.CC(=O)O[Al] HDYRYUINDGQKMC-UHFFFAOYSA-M 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 229940009827 aluminum acetate Drugs 0.000 description 2
- SRSXLGNVWSONIS-UHFFFAOYSA-N benzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-N 0.000 description 2
- 229940092714 benzenesulfonic acid Drugs 0.000 description 2
- VSGNNIFQASZAOI-UHFFFAOYSA-L calcium acetate Chemical compound [Ca+2].CC([O-])=O.CC([O-])=O VSGNNIFQASZAOI-UHFFFAOYSA-L 0.000 description 2
- 239000001639 calcium acetate Substances 0.000 description 2
- 235000011092 calcium acetate Nutrition 0.000 description 2
- 229960005147 calcium acetate Drugs 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 2
- 238000005886 esterification reaction Methods 0.000 description 2
- 150000002170 ethers Chemical class 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 238000002329 infrared spectrum Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000001819 mass spectrum Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229940098779 methanesulfonic acid Drugs 0.000 description 2
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 2
- 235000011056 potassium acetate Nutrition 0.000 description 2
- NNFCIKHAZHQZJG-UHFFFAOYSA-N potassium cyanide Chemical compound [K+].N#[C-] NNFCIKHAZHQZJG-UHFFFAOYSA-N 0.000 description 2
- LPNYRYFBWFDTMA-UHFFFAOYSA-N potassium tert-butoxide Chemical compound [K+].CC(C)(C)[O-] LPNYRYFBWFDTMA-UHFFFAOYSA-N 0.000 description 2
- 238000000425 proton nuclear magnetic resonance spectrum Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000001632 sodium acetate Substances 0.000 description 2
- 235000017281 sodium acetate Nutrition 0.000 description 2
- QDRKDTQENPPHOJ-UHFFFAOYSA-N sodium ethoxide Chemical compound [Na+].CC[O-] QDRKDTQENPPHOJ-UHFFFAOYSA-N 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- YJGJRYWNNHUESM-UHFFFAOYSA-J triacetyloxystannyl acetate Chemical compound [Sn+4].CC([O-])=O.CC([O-])=O.CC([O-])=O.CC([O-])=O YJGJRYWNNHUESM-UHFFFAOYSA-J 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- DFGBSGRXJDOWJW-UHFFFAOYSA-N 2-[bis(trimethylsilyl)-trimethylsilyloxysilyl]ethanol Chemical compound C[Si](C)(C)O[Si]([Si](C)(C)C)([Si](C)(C)C)CCO DFGBSGRXJDOWJW-UHFFFAOYSA-N 0.000 description 1
- FMFWZINTWFLLMX-UHFFFAOYSA-N 2-[hydroxy-bis(trimethylsilyl)silyl]ethanol Chemical compound C[Si](C)(C)[Si](O)([Si](C)(C)C)CCO FMFWZINTWFLLMX-UHFFFAOYSA-N 0.000 description 1
- UPRCURKGHAIGAY-UHFFFAOYSA-N 2-bis(trimethylsilyl)silylethanol Chemical compound C[Si](C)(C)[SiH]([Si](C)(C)C)CCO UPRCURKGHAIGAY-UHFFFAOYSA-N 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- KOFUVNISAOOCMP-UHFFFAOYSA-N C[Si](C)(C)[Si]([Li])([Si](C)(C)C)[Si](C)(C)C Chemical compound C[Si](C)(C)[Si]([Li])([Si](C)(C)C)[Si](C)(C)C KOFUVNISAOOCMP-UHFFFAOYSA-N 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000012300 argon atmosphere Substances 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 230000003301 hydrolyzing effect Effects 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- PSHKMPUSSFXUIA-UHFFFAOYSA-N n,n-dimethylpyridin-2-amine Chemical compound CN(C)C1=CC=CC=N1 PSHKMPUSSFXUIA-UHFFFAOYSA-N 0.000 description 1
- YKYONYBAUNKHLG-UHFFFAOYSA-N n-Propyl acetate Natural products CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 description 1
- 238000005580 one pot reaction Methods 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- NHARPDSAXCBDDR-UHFFFAOYSA-N propyl 2-methylprop-2-enoate Chemical compound CCCOC(=O)C(C)=C NHARPDSAXCBDDR-UHFFFAOYSA-N 0.000 description 1
- 229940090181 propyl acetate Drugs 0.000 description 1
- PNXMTCDJUBJHQJ-UHFFFAOYSA-N propyl prop-2-enoate Chemical compound CCCOC(=O)C=C PNXMTCDJUBJHQJ-UHFFFAOYSA-N 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- SCHZCUMIENIQMY-UHFFFAOYSA-N tris(trimethylsilyl)silicon Chemical compound C[Si](C)(C)[Si]([Si](C)(C)C)[Si](C)(C)C SCHZCUMIENIQMY-UHFFFAOYSA-N 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 description 1
- 238000010626 work up procedure Methods 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
-
- 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
Definitions
- This invention relates to a process for preparing 2-[tris(trimethylsilyl)silyl]ethyl methacrylate and 2-[tris(trimethylsilyl)silyl]ethyl acrylate.
- methacrylate and acrylate are collectively designated (meth)acrylate.
- 2-[Tris(trimethylsilyl)silyl]ethyl (meth)acrylate is a useful monomer to form a polymer for use in bi-layer photoresist to be processed by lithography using excimer laser light.
- 2-[tris(trimethylsilyl)-silyl]ethyl methacrylate is prepared by an esterification process of reacting a corresponding alcohol, that is, 2-tris(trimethylsilyl)silylethanol with methacryloyl chloride (see Sooriyakumaran et al., SPIE, Vol. 3333, p. 219 and Allen et al., U.S. Pat. No. 5,985,524).
- the process starting from the acid chloride and the alcohol in these references has the following problems when it is carried out on an industrial scale.
- the reaction is usually effected using more than an equivalent of a base in a solvent.
- the acid chloride should be handled with caution since it is corrosived moisture sensitive. Work-up process, including extraction and concentration step, is necessarily required.
- 2-[tris(trimethylsilyl)silyl]-ethanol is synthesized by reaction of a silicon metal reagent, tris(trimethylsilyl)silyllithium with low-boiling ethylene oxide (boiling point 10.7° C.) (see Brook et al., Organometallics, 1984, 3, p. 1317). This synthesis process also encounters difficulty upon industrial implementation because the awkward-to-handle compound is used.
- An object of the invention is to provide a novel and improved process for preparing 2-[tris(trimethylsilyl)-silyl]ethyl methacrylate and 2-[tris(trimethylsilyl)silyl]-ethyl acrylate in high yields using 2-[tris(trimethylsilyl)-silyl]ethyl acetate as a starting material, the process being easy and safe to carry out on an industrial scale.
- 2-[tris(trimethylsilyl)silyl]-ethyl (meth)acrylate can be prepared simply by reacting 2-[tris(trimethylsilyl)silyl]ethyl acetate with an alcohol in the presence of a catalyst, then reacting the resulting 2-[tris(trimethylsilyl)silyl]ethanol with a (meth)acrylate ester.
- the invention provides a process for preparing 2-[tris(trimethylsilyl)silyl]ethyl (meth)acrylate, comprising the steps of reacting 2-[tris(trimethylsilyl)silyl]ethyl acetate with an alcohol in the presence of a catalyst to form 2-[tris(trimethylsilyl)silyl]ethanol, then reacting it with an alkyl (meth)acrylate to form 2-[tris(trimethylsilyl)silyl]ethyl (meth)acrylate.
- a first step of the inventive process is to reacting 2-[tris(trimethylsilyl)silyl]ethyl acetate with an alcohol in the presence of a catalyst for ester exchange reaction to form 2-[tris(trimethylsilyl)silyl]ethanol.
- the alcohol used herein may be selected from among methanol, ethanol, 1-propanol and 1-butanol, though not limited thereto.
- the reaction may be effected without a solvent.
- Solventless reaction is advantageous because extra operations such as concentration and solvent recovery are unnecessary. However, auxiliary use of a solvent is possible.
- the solvent if used, is usually selected from hydrocarbons such as hexane, heptane, benzene, toluene, xylene, and cumene; and ethers such as tetrahydrofuran, di-n-butyl ether, ethylene glycol dimethyl ether, and ethylene glycol diethyl ether.
- the catalyst used herein includes a variety of compounds, for example, acids such as hydrochloric acid, sulfuric acid, trifluoroacetic acid, methanesulfonic acid, benzenesulfonic acid, and p-toluenesulfonic acid; bases such as sodium methoxide, sodium ethoxide, potassium t-butoxide, and N,N-dimethylaminopyridine; salts such as sodium cyanide, potassium cyanide, sodium acetate, potassium acetate, calcium acetate, tin acetate, aluminum acetate, aluminum acetoacetate, and alumina; and Lewis acids such as aluminum trichloride, aluminum ethoxide, aluminum isopropoxide, boron trifluoride, boron trichloride, boron tribromide, tin tetrachloride, tin tetrabromide, dibutyltin dichloride, dibutyltin di
- Lewis acids such as aluminum trichloride, aluminum ethoxide, aluminum isopropoxide, boron trifluoride, boron trichloride, boron tribromide, tin tetrachloride, tin tetrabromide, dibutyltin dichloride, dibutyltin dibromide, dibutyltin dimethoxide, dibutyltin oxide, titanium tetrachloride, titanium tetrabromide, titanium (IV) methoxide, titanium (IV) ethoxide, titanium (IV) isopropoxide, and titanium (IV) oxide are advantageous since they promote rapid reaction, resulting in higher yields.
- the catalyst is used in a catalytic amount and usually in an amount of 0.1 to 50 mol % based on the moles of the starting reactant, 2-[tris(trimethylsilyl)silyl]ethyl acetate.
- An amount of 0.1 to 5 mol % is especially desirable from the standpoints of yield and cost.
- Reaction is usually effected while heating the reaction system so that the low-boiling alkyl acetate resulting from ester exchange reaction, such as methyl acetate, ethyl acetate, propyl acetate or butyl acetate may be removed from the reaction system.
- ester exchange reaction such as methyl acetate, ethyl acetate, propyl acetate or butyl acetate
- the second step of the inventive process is to react the 2-[tris(trimethylsilyl)silyl]ethanol resulting from the first step with a (meth)acrylate ester in the presence of a catalyst for ester exchange reaction to form 2-[tris(trimethylsilyl)silyl]ethyl (meth)acrylate.
- a catalyst for ester exchange reaction to form 2-[tris(trimethylsilyl)silyl]ethyl (meth)acrylate.
- the (meth)acrylate ester used herein include methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, n-butyl methacrylate, methyl acrylate, ethyl acrylate, n-propyl acrylate, and n-butyl acrylate. Of these, methyl methacrylate, ethyl methacrylate, methyl acrylate and ethyl acrylate are preferable because of their cost and
- the reaction may be effected without a solvent.
- Solventless reaction is advantageous because extra operations such as concentration and solvent recovery are unnecessary.
- auxiliary use of a solvent is possible.
- the solvent if used, is usually selected from hydrocarbons such as hexane, heptane, benzene, toluene, xylene, and cumene; and ethers such as tetrahydrofuran, di-n-butyl ether, ethylene glycol dimethyl ether, and ethylene glycol diethyl ether.
- hydrocarbons such as hexane, heptane, benzene, toluene, xylene, and cumene
- ethers such as tetrahydrofuran, di-n-butyl ether, ethylene glycol dimethyl ether, and ethylene glycol diethyl ether.
- the catalyst used in the second step includes a variety of compounds, for example, acids such as hydrochloric acid, sulfuric acid, trifluoroacetic acid, methanesulfonic acid, benzenesulfonic acid, and p-toluenesulfonic acid; bases such as sodium methoxide, sodium ethoxide, potassium t-butoxide, and 4-dimethylaminopyridine; salts such as sodium cyanide, potassium cyanide, sodium acetate, potassium acetate, calcium acetate, tin acetate, aluminum acetate, aluminum acetoacetate, and alumina; and Lewis acids such as aluminum trichloride, aluminum ethoxide, aluminum isopropoxide, boron trifluoride, boron trichloride, boron tribromide, tin tetrachloride, tin tetrabromide, dibutyltin dichloride, dibutyltin dibro
- Lewis acids such as aluminum trichloride, aluminum ethoxide, aluminum isopropoxide, boron trifluoride, boron trichloride, boron tribromide, tin tetrachloride, tin tetrabromide, dibutyltin dichloride, dibutyltin dibromide, dibutyltin dimethoxide, dibutyltin oxide, titanium tetrachloride, titanium tetrabromide, titanium (IV) methoxide, titanium (IV) ethoxide, titanium (IV) isopropoxide, and titanium (IV) oxide are advantageous since they promote rapid reaction, resulting in higher yields.
- the catalyst is used in a catalytic amount and usually in an amount of 0.1 to 50 mol % based on the moles of the intermediate, 2-[tris(trimethylsilyl)silyl]ethanol.
- An amount of 0.1 to 5 mol % is especially desirable from the standpoints of yield and cost.
- the catalyst can be newly added at the second step, although it is economical that the catalyst used in the first step is kept to the second step.
- Reaction is usually effected while heating the reaction system so that the low-boiling alcohol resulting from ester exchange reaction, such as methanol, ethanol, 1-propanol or 1-butanol may be removed from the reaction system.
- ester exchange reaction such as methanol, ethanol, 1-propanol or 1-butanol
- the inventive process needs no purifying operation at the end of the first step of reaction and can use a common catalyst and a common solvent, if used, in the first and second steps, a series of conversion reactions can be effected in one reactor.
- the possibility of one-pot reaction is of significance from the industrial aspect.
- the target compound, 2-[tris(trimethylsilyl)silyl]ethyl (meth)acrylate can be isolated in high purity and high yields by conventional distillation operation.
- a reactor equipped with a distillation head was charged with 335 g of 2-[tris(trimethylsilyl)silyl]ethyl acetate and 2.84 g of titanium (IV) isopropoxide. The mixture was stirred and heated at 70° C. To the mixture, 100 ml of methanol was added dropwise over 2 hours, during which period the resulting methyl acetate was distilled out of the system. After 2 hours of stirring under reflux, the excess methanol was distilled off. To the residue was added 105 g of methyl methacrylate. Under reflux, the resulting methanol was distilled off.
- Example 2 By following the procedure of Example 1 aside from using boron tribromide instead of the titanium (IV) isopropoxide in Example 1, the target compound, 2-[tris(trimethylsilyl)silyl]ethyl methacrylate was obtained in a yield of 79%.
- Example 1 By following the procedure of Example 1 aside from using aluminum isopropoxide instead of the titanium (IV) isopropoxide in Example 1, the target compound, 2-[tris(trimethylsilyl)silyl]ethyl methacrylate was obtained in a yield of 94%.
- Example 1 By following the procedure of Example 1 aside from using dibutyltin oxide instead of the titanium (IV) isopropoxide in Example 1, the target compound, 2-[tris(trimethylsilyl)silyl]ethyl methacrylate was obtained in a yield of 96%.
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Abstract
An industrially acceptable process for preparing 2-[tris(trimethylsilyl)silyl]ethyl (meth)acrylate in high yields involves reacting 2-[tris(trimethylsilyl)silyl]ethyl acetate with an alcohol in the presence of a catalyst to form 2-[tris(trimethylsilyl)silyl]ethanol, then reacting it with a (meth)acrylate ester.
Description
- This invention relates to a process for preparing 2-[tris(trimethylsilyl)silyl]ethyl methacrylate and 2-[tris(trimethylsilyl)silyl]ethyl acrylate. For brevity sake, methacrylate and acrylate are collectively designated (meth)acrylate.
- 2-[Tris(trimethylsilyl)silyl]ethyl (meth)acrylate is a useful monomer to form a polymer for use in bi-layer photoresist to be processed by lithography using excimer laser light. In the prior art, 2-[tris(trimethylsilyl)-silyl]ethyl methacrylate is prepared by an esterification process of reacting a corresponding alcohol, that is, 2-tris(trimethylsilyl)silylethanol with methacryloyl chloride (see Sooriyakumaran et al., SPIE, Vol. 3333, p. 219 and Allen et al., U.S. Pat. No. 5,985,524). The process starting from the acid chloride and the alcohol in these references, however, has the following problems when it is carried out on an industrial scale. The reaction is usually effected using more than an equivalent of a base in a solvent. The acid chloride should be handled with caution since it is corrosived moisture sensitive. Work-up process, including extraction and concentration step, is necessarily required.
- On the other hand, 2-[tris(trimethylsilyl)silyl]-ethanol is synthesized by reaction of a silicon metal reagent, tris(trimethylsilyl)silyllithium with low-boiling ethylene oxide (boiling point 10.7° C.) (see Brook et al., Organometallics, 1984, 3, p. 1317). This synthesis process also encounters difficulty upon industrial implementation because the awkward-to-handle compound is used.
- Also known in the art is the synthesis of 2-[tris(trimethylsilyl)silyl]ethyl acetate by reaction of tris(trimethylsilyl)silane with vinyl acetate (see Kopping et al., J. Org. Chem., 1992, 57, p. 3994). It is also contemplated to synthesize 2-[tris(trimethylsilyl)silyl]-ethanol by hydrolyzing or reducing the 2-[tris(trimethylsilyl)silyl]ethyl acetate. Another known example is reduction with lithium aluminum hydride (see Allen et al., U.S. Pat. No. 5,985,524). This process, however, encounters more difficulty because two steps of alcohol formation and esterification reaction are involved.
- Another problem is that the intermediate 2-[tris-(trimethylsilyl)silyl]ethanol is impossible to purify by distillation since it is a crystal having a melting point of about 150° C. Purification by recrystallization is industrially troublesome, and a substantial loss is inevitable.
- An object of the invention is to provide a novel and improved process for preparing 2-[tris(trimethylsilyl)-silyl]ethyl methacrylate and 2-[tris(trimethylsilyl)silyl]-ethyl acrylate in high yields using 2-[tris(trimethylsilyl)-silyl]ethyl acetate as a starting material, the process being easy and safe to carry out on an industrial scale.
- It has been found that 2-[tris(trimethylsilyl)silyl]-ethyl (meth)acrylate can be prepared simply by reacting 2-[tris(trimethylsilyl)silyl]ethyl acetate with an alcohol in the presence of a catalyst, then reacting the resulting 2-[tris(trimethylsilyl)silyl]ethanol with a (meth)acrylate ester.
- The invention provides a process for preparing 2-[tris(trimethylsilyl)silyl]ethyl (meth)acrylate, comprising the steps of reacting 2-[tris(trimethylsilyl)silyl]ethyl acetate with an alcohol in the presence of a catalyst to form 2-[tris(trimethylsilyl)silyl]ethanol, then reacting it with an alkyl (meth)acrylate to form 2-[tris(trimethylsilyl)silyl]ethyl (meth)acrylate.
- A first step of the inventive process is to reacting 2-[tris(trimethylsilyl)silyl]ethyl acetate with an alcohol in the presence of a catalyst for ester exchange reaction to form 2-[tris(trimethylsilyl)silyl]ethanol. The alcohol used herein may be selected from among methanol, ethanol, 1-propanol and 1-butanol, though not limited thereto.
- The reaction may be effected without a solvent. Solventless reaction is advantageous because extra operations such as concentration and solvent recovery are unnecessary. However, auxiliary use of a solvent is possible. The solvent, if used, is usually selected from hydrocarbons such as hexane, heptane, benzene, toluene, xylene, and cumene; and ethers such as tetrahydrofuran, di-n-butyl ether, ethylene glycol dimethyl ether, and ethylene glycol diethyl ether.
- The catalyst used herein includes a variety of compounds, for example, acids such as hydrochloric acid, sulfuric acid, trifluoroacetic acid, methanesulfonic acid, benzenesulfonic acid, and p-toluenesulfonic acid; bases such as sodium methoxide, sodium ethoxide, potassium t-butoxide, and N,N-dimethylaminopyridine; salts such as sodium cyanide, potassium cyanide, sodium acetate, potassium acetate, calcium acetate, tin acetate, aluminum acetate, aluminum acetoacetate, and alumina; and Lewis acids such as aluminum trichloride, aluminum ethoxide, aluminum isopropoxide, boron trifluoride, boron trichloride, boron tribromide, tin tetrachloride, tin tetrabromide, dibutyltin dichloride, dibutyltin dibromide, dibutyltin dimethoxide, dibutyltin oxide, titanium tetrachloride, titanium tetrabromide, titanium (IV) methoxide, titanium (IV) ethoxide, titanium (IV) isopropoxide, and titanium (IV) oxide. They may be used alone or in admixture. Of these, Lewis acids such as aluminum trichloride, aluminum ethoxide, aluminum isopropoxide, boron trifluoride, boron trichloride, boron tribromide, tin tetrachloride, tin tetrabromide, dibutyltin dichloride, dibutyltin dibromide, dibutyltin dimethoxide, dibutyltin oxide, titanium tetrachloride, titanium tetrabromide, titanium (IV) methoxide, titanium (IV) ethoxide, titanium (IV) isopropoxide, and titanium (IV) oxide are advantageous since they promote rapid reaction, resulting in higher yields. The catalyst is used in a catalytic amount and usually in an amount of 0.1 to 50 mol % based on the moles of the starting reactant, 2-[tris(trimethylsilyl)silyl]ethyl acetate. An amount of 0.1 to 5 mol % is especially desirable from the standpoints of yield and cost.
- Reaction is usually effected while heating the reaction system so that the low-boiling alkyl acetate resulting from ester exchange reaction, such as methyl acetate, ethyl acetate, propyl acetate or butyl acetate may be removed from the reaction system.
- The resulting product, 2-[tris(trimethylsilyl)silyl]-ethanol which can be purified by recrystallization. However, the 2-[tris(trimethylsilyl)silyl]ethanol in the reaction mixture has a sufficient purity for the second step, and can be employed in the next step as the mixture with the catalyst and the solvent (if any), without purification.
- The second step of the inventive process is to react the 2-[tris(trimethylsilyl)silyl]ethanol resulting from the first step with a (meth)acrylate ester in the presence of a catalyst for ester exchange reaction to form 2-[tris(trimethylsilyl)silyl]ethyl (meth)acrylate. Examples of the (meth)acrylate ester used herein include methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, n-butyl methacrylate, methyl acrylate, ethyl acrylate, n-propyl acrylate, and n-butyl acrylate. Of these, methyl methacrylate, ethyl methacrylate, methyl acrylate and ethyl acrylate are preferable because of their cost and rapid progress of reaction.
- The reaction may be effected without a solvent. Solventless reaction is advantageous because extra operations such as concentration and solvent recovery are unnecessary. However, auxiliary use of a solvent is possible. The solvent, if used, is usually selected from hydrocarbons such as hexane, heptane, benzene, toluene, xylene, and cumene; and ethers such as tetrahydrofuran, di-n-butyl ether, ethylene glycol dimethyl ether, and ethylene glycol diethyl ether. When the solvent is used in the second step, it is economical that the solvent used in the first step is kept to the second step.
- The catalyst used in the second step includes a variety of compounds, for example, acids such as hydrochloric acid, sulfuric acid, trifluoroacetic acid, methanesulfonic acid, benzenesulfonic acid, and p-toluenesulfonic acid; bases such as sodium methoxide, sodium ethoxide, potassium t-butoxide, and 4-dimethylaminopyridine; salts such as sodium cyanide, potassium cyanide, sodium acetate, potassium acetate, calcium acetate, tin acetate, aluminum acetate, aluminum acetoacetate, and alumina; and Lewis acids such as aluminum trichloride, aluminum ethoxide, aluminum isopropoxide, boron trifluoride, boron trichloride, boron tribromide, tin tetrachloride, tin tetrabromide, dibutyltin dichloride, dibutyltin dibromide, dibutyltin dimethoxide, dibutyltin oxide, titanium tetrachloride, titanium tetrabromide, titanium (IV) methoxide, titanium (IV) ethoxide, titanium (IV) isopropoxide, and titanium (IV) oxide. They may be used alone or in admixture. Of these, Lewis acids such as aluminum trichloride, aluminum ethoxide, aluminum isopropoxide, boron trifluoride, boron trichloride, boron tribromide, tin tetrachloride, tin tetrabromide, dibutyltin dichloride, dibutyltin dibromide, dibutyltin dimethoxide, dibutyltin oxide, titanium tetrachloride, titanium tetrabromide, titanium (IV) methoxide, titanium (IV) ethoxide, titanium (IV) isopropoxide, and titanium (IV) oxide are advantageous since they promote rapid reaction, resulting in higher yields. The catalyst is used in a catalytic amount and usually in an amount of 0.1 to 50 mol % based on the moles of the intermediate, 2-[tris(trimethylsilyl)silyl]ethanol. An amount of 0.1 to 5 mol % is especially desirable from the standpoints of yield and cost. The catalyst can be newly added at the second step, although it is economical that the catalyst used in the first step is kept to the second step.
- Reaction is usually effected while heating the reaction system so that the low-boiling alcohol resulting from ester exchange reaction, such as methanol, ethanol, 1-propanol or 1-butanol may be removed from the reaction system.
- Since the inventive process needs no purifying operation at the end of the first step of reaction and can use a common catalyst and a common solvent, if used, in the first and second steps, a series of conversion reactions can be effected in one reactor. The possibility of one-pot reaction is of significance from the industrial aspect.
- From the reaction mixture of the second step, the target compound, 2-[tris(trimethylsilyl)silyl]ethyl (meth)acrylate can be isolated in high purity and high yields by conventional distillation operation.
- Examples of the invention are given for illustration, and should not be considered to be any type of limitation on the scope of the invention.
- Preparation of 2-[tris(trimethylsilyl)silyl]ethyl methacrylate
- A reactor equipped with a distillation head was charged with 335 g of 2-[tris(trimethylsilyl)silyl]ethyl acetate and 2.84 g of titanium (IV) isopropoxide. The mixture was stirred and heated at 70° C. To the mixture, 100 ml of methanol was added dropwise over 2 hours, during which period the resulting methyl acetate was distilled out of the system. After 2 hours of stirring under reflux, the excess methanol was distilled off. To the residue was added 105 g of methyl methacrylate. Under reflux, the resulting methanol was distilled off. After stirring for further 2 hours, the mixture was distilled in vacuo to obtain 336 g (yield 93%) of the target compound, 2-[tris(trimethylsilyl)- silyl]ethyl methacrylate.
Boiling point: 117-120° C./65 Pa IR spectrum (liquid membrane method): νmax 2948, 2894, 1716, 1639, 1452, 1400, 1317, 1294, 1245, 1157, 939, 835, 688, 622 cm−1 EI-mass spectrum: (m/z)+= 41 [(CH2 = C(CH3))+], 69 [(CH2 = C(CH3)CO)+], 259 [(M minus ethylene minus trimethylsilyl)+], 287 [(M minus trimethylsilyl)+], 317 [(M minus ethylene minus methyl)+], 332 [(M minus ethylene)+] 1H-NMR spectrum (270 MHz, CDCl3): δ = 0.19 (s, 27H), 1.26 (m, 2H), 1.94 (m, 3H), 4.21 (m, 2H), 5.54 (m, 1H), 6.09 (m, 1H) ppm - By following the procedure of Example 1 aside from using ethyl methacrylate instead of the methyl methacrylate in Example 1, the target compound, 2-[tris(trimethylsilyl)-silyl]ethyl methacrylate was obtained in a yield of 87%.
- By following the procedure of Example 1 aside from using boron tribromide instead of the titanium (IV) isopropoxide in Example 1, the target compound, 2-[tris(trimethylsilyl)silyl]ethyl methacrylate was obtained in a yield of 79%.
- By following the procedure of Example 1 aside from using aluminum isopropoxide instead of the titanium (IV) isopropoxide in Example 1, the target compound, 2-[tris(trimethylsilyl)silyl]ethyl methacrylate was obtained in a yield of 94%.
- By following the procedure of Example 1 aside from using dibutyltin oxide instead of the titanium (IV) isopropoxide in Example 1, the target compound, 2-[tris(trimethylsilyl)silyl]ethyl methacrylate was obtained in a yield of 96%.
- A mixture of 33.5 g of 2-[tris(trimethylsilyl)silyl]-ethyl acetate, 270 ml of 15% aqueous sodium hydroxide and 200 ml of methanol was stirred for 4 hours at room temperature. The reaction mixture was poured into saturated aqueous sodium chloride and extracted with n-hexane. The n-hexane solution was washed, dried and concentrated, obtaining 17.6 g (yield 60%) of a crude product. On analysis by gas chromatography, it was found to contain 81.4% of 2-[tris(trimethylsilyl)silyl]ethanol and 12.7% of a mixture of three by-products, bis(trimethylsilyl)(2-hydroxy-ethyl)silane HOCH2CH2Si(H) (Si(CH3)3)2, bis(trimethylsilyl) (2-hydroxyethyl)silanol HOCH2CH2Si(OH)(Si(CH3)3)2, and 1,1-bis(trimethylsilyl)-1-(2-hydroxyethyl)-3,3,3-trimethyldisiloxane HOCH2CH2Si(Si(CH3)3)2(OSi (CH3)3).
- To the crude product, 120 ml of methylene chloride and 8 g of triethylamine were added and stirred at 5° C. Methacryloyl chloride, 6.3 g, was added dropwise to the mixture, which was stirred for 12 hours at room temperature, poured into ice water, and extracted with ethyl acetate. The ethyl acetate solution was washed, dried and concentrated. The residue was distilled in vacuo, obtaining 15.8 g of the target compound, 2-[tris(trimethylsilyl)-silyl]ethyl methacrylate. The yield throughout the two steps was 44%.
- A solution of 3.8 g lithium aluminum hydride (LiAlH4) in 100 ml tetrahydrofuran was stirred at 5° C. in an argon atmosphere. To the solution, 33.5 g of 2-[tris(trimethyl-silyl)silyl]ethyl acetate was added dropwise. After one hour of stirring at 5° C., with ice cooling, 3.8 ml of water, 3.8 ml of 15% aqueous sodium hydroxide, and 11.4 ml of water were successively added to the solution in the described order. The mixture was stirred for one hour at room temperature. The resulting precipitate was filtered off, and the tetrahydrofuran solution was dried and concentrated, obtaining 24.8 g of 2-[tris(trimethylsilyl)silyl]ethanol. This crude product was dissolved in a solvent and analyzed by gas chromatography, finding that it contained 98.2% of 2-[tris(trimethylsilyl)silyl]ethanol. This was esterified with methacryloyl chloride in the presence of triethylamine as the base as in Comparative Example 1. Subsequent extraction and vacuum distillation for purification gave 29.5 g of the end compound, 2-[tris(trimethylsilyl)silyl]-ethyl methacrylate. The yield throughout the two steps was 82%.
- Preparation of 2-[tris(trimethylsilyl)silyl]ethyl acrylate
- By following the procedure of Example 1 aside from using methyl acrylate instead of the methyl methacrylate in Example 1, the target compound, 2-[tris(trimethylsilyl)-silyl]ethyl acrylate was obtained in a yield of 92%.
IR spectrum (liquid membrane method): νmax 2949, 2895, 1726, 1637, 1620, 1406, 1245, 1182, 1045, 835, 688, 623 cm−1 EI-mass spectrum: (m/z)+= 55 [(CH2 = CHCO)+], 73 [(Si(CH3)3)+], 245 [(M minus ethylene minus trimethylsilyl)+], 273 [(M minus trimethylsilyl)+], 303 [(M minus ethylene minus methyl)+], 318 [(M minus ethylene)+] 1H-NMR spectrum (270 MHz, CDCl3): δ = 0.19 (s, 27H), 1.25 (m, 2H), 4.22 (m, 2H), 5.80 (dd, J = 10.3, 1.6 Hz, 1H), 6.10 (dd, J = 17.0, 10.3 Hz, 1H) 6.40 (dd, J = 17.0, 1.6 Hz, 1H) ppm - By starting with 2-[tris(trimethylsilyl)silyl]ethyl acetate, the inventive process is successful in preparing 2-[tris(trimethylsilyl)silyl]ethyl (meth)acrylate in high yields on an industrial scale.
- Japanese Patent Application No. 2000-000888 is incorporated herein by reference.
- Although some preferred embodiments have been described, many modifications and variations may be made thereto in light of the above teachings. It is therefore to be understood that the invention may be practiced otherwise than as specifically described without departing from the scope of the appended claims.
Claims (3)
1. A process for preparing 2-[tris(trimethylsilyl)silyl]-ethyl (meth)acrylate, comprising the steps of reacting 2-[tris(trimethylsilyl)silyl]ethyl acetate with an alcohol in the presence of a catalyst to form 2-[tris(trimethylsilyl)-silyl]ethanol, then reacting it with a (meth)acrylate to form 2-[tris(trimethylsilyl)silyl]ethyl (meth)acrylate.
2. The process of wherein the catalyst is a Lewis acid.
claim 1
3. The process of wherein the catalyst is a Lewis acid containing Al, B, Sn or Ti.
claim 1
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DE4434200C2 (en) * | 1994-09-24 | 2002-06-27 | Degussa | Process for the preparation of 3-acryloxypropylalkoxysilanes |
DE19531144C2 (en) * | 1995-08-24 | 2003-08-28 | Degussa | Water-containing dissolutions of acrylic-functionalized organosilanes, processes for their preparation and their use |
US5985524A (en) | 1997-03-28 | 1999-11-16 | International Business Machines Incorporated | Process for using bilayer photoresist |
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