JP2022140364A - 4-(パーフルオロプロパン-2-イル)-2-トリフルオロメチルアニリンの調製方法およびその使用 - Google Patents
4-(パーフルオロプロパン-2-イル)-2-トリフルオロメチルアニリンの調製方法およびその使用 Download PDFInfo
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- trifluoromethylaniline
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- perfluoropropan
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- 238000000034 method Methods 0.000 title claims abstract description 29
- JNVWIZVZNZAVRK-UHFFFAOYSA-N 4-(1,1,1,2,3,3,3-heptafluoropropan-2-yl)-2-(trifluoromethyl)aniline Chemical compound NC1=CC=C(C(F)(C(F)(F)F)C(F)(F)F)C=C1C(F)(F)F JNVWIZVZNZAVRK-UHFFFAOYSA-N 0.000 title claims abstract description 28
- VBLXCTYLWZJBKA-UHFFFAOYSA-N 2-(trifluoromethyl)aniline Chemical compound NC1=CC=CC=C1C(F)(F)F VBLXCTYLWZJBKA-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000004280 Sodium formate Substances 0.000 claims abstract description 10
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 claims abstract description 10
- 235000019254 sodium formate Nutrition 0.000 claims abstract description 10
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 48
- 238000006243 chemical reaction Methods 0.000 claims description 35
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 34
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 239000012043 crude product Substances 0.000 claims description 24
- SULCAUVYSILBCB-UHFFFAOYSA-N 2-bromo-1,1,1,2,3,3,3-heptafluoropropane Chemical compound FC(F)(F)C(F)(Br)C(F)(F)F SULCAUVYSILBCB-UHFFFAOYSA-N 0.000 claims description 22
- 239000012044 organic layer Substances 0.000 claims description 20
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 17
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 claims description 16
- 238000002360 preparation method Methods 0.000 claims description 16
- 239000002904 solvent Substances 0.000 claims description 12
- -1 alkali metal sulfite Chemical class 0.000 claims description 10
- JVBXVOWTABLYPX-UHFFFAOYSA-L sodium dithionite Chemical group [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 claims description 10
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 9
- SHFJWMWCIHQNCP-UHFFFAOYSA-M hydron;tetrabutylazanium;sulfate Chemical compound OS([O-])(=O)=O.CCCC[N+](CCCC)(CCCC)CCCC SHFJWMWCIHQNCP-UHFFFAOYSA-M 0.000 claims description 8
- 239000003444 phase transfer catalyst Substances 0.000 claims description 7
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 claims description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 6
- 229910052783 alkali metal Inorganic materials 0.000 claims description 4
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 3
- WMOVHXAZOJBABW-UHFFFAOYSA-N tert-butyl acetate Chemical compound CC(=O)OC(C)(C)C WMOVHXAZOJBABW-UHFFFAOYSA-N 0.000 claims description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 3
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 claims description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 2
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 claims description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 2
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 claims description 2
- 229940043232 butyl acetate Drugs 0.000 claims description 2
- 229940093499 ethyl acetate Drugs 0.000 claims description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 2
- JMMWKPVZQRWMSS-UHFFFAOYSA-N isopropanol acetate Natural products CC(C)OC(C)=O JMMWKPVZQRWMSS-UHFFFAOYSA-N 0.000 claims description 2
- 229940011051 isopropyl acetate Drugs 0.000 claims description 2
- GWYFCOCPABKNJV-UHFFFAOYSA-N isovaleric acid Chemical compound CC(C)CC(O)=O GWYFCOCPABKNJV-UHFFFAOYSA-N 0.000 claims description 2
- YKYONYBAUNKHLG-UHFFFAOYSA-N n-Propyl acetate Natural products CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 claims description 2
- FVSKHRXBFJPNKK-UHFFFAOYSA-N propionitrile Chemical compound CCC#N FVSKHRXBFJPNKK-UHFFFAOYSA-N 0.000 claims description 2
- 229940090181 propyl acetate Drugs 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims 3
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 claims 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims 1
- SLFVYFOEHHLHDW-UHFFFAOYSA-N n-(trifluoromethyl)aniline Chemical compound FC(F)(F)NC1=CC=CC=C1 SLFVYFOEHHLHDW-UHFFFAOYSA-N 0.000 claims 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims 1
- 239000008096 xylene Substances 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 description 16
- WERQQWICVQUZHF-UHFFFAOYSA-M sodium formate dihydrate Chemical compound O.O.[Na+].[O-]C=O WERQQWICVQUZHF-UHFFFAOYSA-M 0.000 description 14
- 238000001514 detection method Methods 0.000 description 13
- 238000004895 liquid chromatography mass spectrometry Methods 0.000 description 13
- 239000000203 mixture Substances 0.000 description 9
- 238000010812 external standard method Methods 0.000 description 8
- 238000004128 high performance liquid chromatography Methods 0.000 description 8
- 239000000047 product Substances 0.000 description 7
- 239000010410 layer Substances 0.000 description 5
- 238000004821 distillation Methods 0.000 description 4
- ZDRAQRDCOVLVBO-UHFFFAOYSA-N C(C(C(F)(F)F)(F)I)F Chemical compound C(C(C(F)(F)F)(F)I)F ZDRAQRDCOVLVBO-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- AFBPFSWMIHJQDM-UHFFFAOYSA-N N-methylaniline Chemical compound CNC1=CC=CC=C1 AFBPFSWMIHJQDM-UHFFFAOYSA-N 0.000 description 2
- 241000209094 Oryza Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- QSLZKWPYTWEWHC-UHFFFAOYSA-N broflanilide Chemical compound C=1C=CC(C(=O)NC=2C(=CC(=CC=2Br)C(F)(C(F)(F)F)C(F)(F)F)C(F)(F)F)=C(F)C=1N(C)C(=O)C1=CC=CC=C1 QSLZKWPYTWEWHC-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- LANNRYWUUQMNPF-UHFFFAOYSA-N 1-bromo-1,1,2,2,3,3,3-heptafluoropropane Chemical compound FC(F)(F)C(F)(F)C(F)(F)Br LANNRYWUUQMNPF-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000002152 alkylating effect Effects 0.000 description 1
- 230000029936 alkylation Effects 0.000 description 1
- 238000005804 alkylation reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003599 detergent Substances 0.000 description 1
- GRWZHXKQBITJKP-UHFFFAOYSA-L dithionite(2-) Chemical compound [O-]S(=O)S([O-])=O GRWZHXKQBITJKP-UHFFFAOYSA-L 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000002917 insecticide Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- KXHORCXSQZTQQI-UHFFFAOYSA-N n-(fluoromethyl)aniline Chemical compound FCNC1=CC=CC=C1 KXHORCXSQZTQQI-UHFFFAOYSA-N 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/68—Preparation of compounds containing amino groups bound to a carbon skeleton from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton
- C07C209/74—Preparation of compounds containing amino groups bound to a carbon skeleton from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton by halogenation, hydrohalogenation, dehalogenation, or dehydrohalogenation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/68—Preparation of compounds containing amino groups bound to a carbon skeleton from amines, by reactions not involving amino groups, e.g. reduction of unsaturated amines, aromatisation, or substitution of the carbon skeleton
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/02—Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
- B01J31/0234—Nitrogen-, phosphorus-, arsenic- or antimony-containing compounds
- B01J31/0235—Nitrogen containing compounds
- B01J31/0239—Quaternary ammonium compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/82—Purification; Separation; Stabilisation; Use of additives
- C07C209/86—Separation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C211/00—Compounds containing amino groups bound to a carbon skeleton
- C07C211/43—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
- C07C211/44—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring
- C07C211/52—Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to only one six-membered aromatic ring the carbon skeleton being further substituted by halogen atoms or by nitro or nitroso groups
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
2-トリフルオロメチルアニリンと2-ブロモヘプタフルオロプロパンとを、ギ酸ナトリウムまたはその水和物およびSO2供与剤の存在下で反応させ、4-(パーフルオロプロパン-2-イル)-2-トリフルオロメチルアニリンを取得することを含む4-(パーフルオロプロパン-2-イル)-2-トリフルオロメチルアニリンの調製方法を提供する。
反応生成物を分離して有機層を取得し、前記有機層を減圧蒸留して溶剤を除去し、洗浄し、再び減圧蒸留して4-(パーフルオロプロパン-2-イル)-2-トリフルオロメチルアニリンを取得するステップを含む。
(1)オートクレーブに、2-トリフルオロメチルアニリン、2-トリフルオロメチルアニリンとの質量比が(1~8):1の溶剤、2-トリフルオロメチルアニリンとのモル比が(0.1~2):1のギ酸ナトリウムまたはその水和物、2-トリフルオロメチルアニリンとのモル比が(0.05~2):1のSO2供与剤、2-トリフルオロメチルアニリンとのモル比が(1.0~2):1の2-ブロモヘプタフルオロプロパンを加え、不活性ガスを系の圧力が0~10MPaとなるまで導入し、系を5~140℃まで昇温し、2~20h反応させ、粗生成物を取得するステップと、
(2)ステップ(1)で得られた粗生成物を分液または濾過し、有機層を取得し、前記有機層を減圧蒸留して溶剤を除去し、炭酸ナトリウム溶液および水でそれぞれ洗浄し、再び減圧蒸留して4-(パーフルオロプロパン-2-イル)-2-トリフルオロメチルアニリンを取得するステップとを含む。
1H NMR(400 MHz, DMSO-d6)データは、以下のとおりである(δ[ppm])。δ7.52 (d, J = 8.9 Hz, 2H), 7.10 (d, J = 8.6 Hz, 1H), 6.38 (s, 2H).
実施例1との区別は、ギ酸ナトリウム二水和物を同じ物質量の炭酸ナトリウムに置き換え、反応終了後に分液し、有機層を高圧液体クロマトグラフィーの外部標準法で定量し、目的化合物の反応収率が61.3%であったことである。
Claims (11)
- 2-トリフルオロメチルアニリンと、2-ブロモヘプタフルオロプロパンとを、ギ酸ナトリウムまたはその水和物およびSO2供与剤の存在下で反応させ、4-(パーフルオロプロパン-2-イル)-2-トリフルオロメチルアニリンを取得することを含むことを特徴とする4-(パーフルオロプロパン-2-イル)-2-トリフルオロメチルアニリンの調製方法。
- 前記ギ酸ナトリウムまたはその水和物と、2-トリフルオロメチルアニリンとのモル比は(0.1~2):1であることを特徴とする請求項1に記載の調製方法。
- 前記SO2供与剤と、2-トリフルオロメチルアニリンとのモル比は(0.05~2):1である、請求項1に記載の調製方法。
- 前記2-ブロモヘプタフルオロプロパンと、2-トリフルオロメチルアニリンとのモル比は(1.0~2):1である、請求項1に記載の調製方法。
- 前記SO2供与剤は、亜ジチオン酸ナトリウム、SO2、アルカリ金属の亜硫酸塩、アルカリ金属の亜硫酸水素塩、アルカリ土類金属の亜硫酸塩、アルカリ土類金属の亜硫酸水素塩、(NH4)2SO3、またはNH4HSO3のいずれか1種または少なくとも2種の組み合わせを含むことを特徴とする請求項1に記載の調製方法。
- 前記反応系には溶剤が更に含まれ、前記溶剤は、水、酢酸メチル、酢酸エチル、酢酸プロピル、酢酸ブチル、酢酸イソプロピル、酢酸t-ブチル、t-ブタノール、アセトニトリル、プロピオニトリル、1,4-ジオキサン、テトラヒドロフラン、メチルt-ブチルエーテル、ジクロロメタン、1,2-ジクロロエタン、クロロホルム、四塩化炭素、ベンゼン、トルエン、またはキシレンのいずれか1種または少なくとも2種の組み合わせを含むことを特徴とする請求項1に記載の調製方法。
- 前記反応系には相間移動触媒が更に含まれ、前記相間移動触媒は、テトラブチルアンモニウム硫酸水素塩を含むことを特徴とする請求項1に記載の調製方法。
- 前記反応の温度は5~140℃であり、前記反応時間は2~20hであり、前記反応は0~10MPaの圧力で行われることを特徴とする請求項1に記載の調製方法。
- 不活性ガスを導入することにより反応系の圧力を高める、請求項1に記載の調製方法。
- (1)オートクレーブに、2-トリフルオロメチルアニリン、2-トリフルオロメチルアニリンとの質量比が(1~8):1の溶剤、2-トリフルオロメチルアニリンとのモル比が(0.1~2):1のギ酸ナトリウムまたはその水和物、2-トリフルオロメチルアニリンとのモル比が(0.05~2):1のSO2供与剤、2-トリフルオロメチルアニリンとのモル比が(1.0~2):1の2-ブロモヘプタフルオロプロパンを加え、不活性ガスを系の圧力が0~10MPaとなるまで導入し、系を5~140℃まで昇温し、2~20h反応させ、粗生成物を取得するステップと、
(2)ステップ(1)で得られた粗生成物を分液または濾過し、有機層を取得し、前記有機層を減圧蒸留して溶剤を除去し、炭酸ナトリウム溶液および水でそれぞれ洗浄し、再び減圧蒸留して4-(パーフルオロプロパン-2-イル)-2-トリフルオロメチルアニリンを取得するステップとを含むことを特徴とする請求項1に記載の調製方法。 - 請求項1に記載の調製方法で調製された4-(パーフルオロプロパン-2-イル)-2-トリフルオロメチルアニリン。
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CN202110260878.9A CN115073300B (zh) | 2021-03-10 | 2021-03-10 | 一种4-(全氟丙烷-2-基)-2-三氟甲基苯胺及其制备方法和应用 |
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