CN113620789A - 一种手性α-氟代烷氧基醇及其制备方法 - Google Patents
一种手性α-氟代烷氧基醇及其制备方法 Download PDFInfo
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- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000006243 chemical reaction Methods 0.000 claims abstract description 43
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 claims abstract description 34
- 239000003054 catalyst Substances 0.000 claims abstract description 29
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims abstract description 28
- -1 fluoroalkyl alcohol Chemical compound 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 15
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims abstract description 14
- 235000019253 formic acid Nutrition 0.000 claims abstract description 14
- 238000009901 transfer hydrogenation reaction Methods 0.000 claims abstract description 13
- LIGACIXOYTUXAW-UHFFFAOYSA-N phenacyl bromide Chemical compound BrCC(=O)C1=CC=CC=C1 LIGACIXOYTUXAW-UHFFFAOYSA-N 0.000 claims abstract description 12
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 7
- 239000001257 hydrogen Substances 0.000 claims abstract description 7
- 229910000160 potassium phosphate Inorganic materials 0.000 claims abstract description 7
- 235000011009 potassium phosphates Nutrition 0.000 claims abstract description 7
- 239000002904 solvent Substances 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims abstract 2
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 13
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 8
- 238000010534 nucleophilic substitution reaction Methods 0.000 claims description 7
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 6
- 125000000217 alkyl group Chemical group 0.000 claims description 6
- 239000000460 chlorine Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- 229910052741 iridium Inorganic materials 0.000 claims description 5
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 5
- HFPZCAJZSCWRBC-UHFFFAOYSA-N p-cymene Chemical compound CC(C)C1=CC=C(C)C=C1 HFPZCAJZSCWRBC-UHFFFAOYSA-N 0.000 claims description 5
- 229910052703 rhodium Inorganic materials 0.000 claims description 5
- 239000010948 rhodium Substances 0.000 claims description 5
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- 125000003118 aryl group Chemical group 0.000 claims description 4
- 229910052736 halogen Inorganic materials 0.000 claims description 4
- 150000002367 halogens Chemical class 0.000 claims description 4
- 125000001624 naphthyl group Chemical group 0.000 claims description 4
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 claims description 4
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- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 239000002585 base Substances 0.000 claims description 3
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 claims description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 3
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 claims description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 claims description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 2
- 125000003545 alkoxy group Chemical group 0.000 claims description 2
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052794 bromium Inorganic materials 0.000 claims description 2
- FJDQFPXHSGXQBY-UHFFFAOYSA-L caesium carbonate Chemical compound [Cs+].[Cs+].[O-]C([O-])=O FJDQFPXHSGXQBY-UHFFFAOYSA-L 0.000 claims description 2
- 229910000024 caesium carbonate Inorganic materials 0.000 claims description 2
- 229910052801 chlorine Inorganic materials 0.000 claims description 2
- 150000004985 diamines Chemical class 0.000 claims description 2
- 229910052731 fluorine Inorganic materials 0.000 claims description 2
- 239000011737 fluorine Substances 0.000 claims description 2
- YUWFEBAXEOLKSG-UHFFFAOYSA-N hexamethylbenzene Chemical compound CC1=C(C)C(C)=C(C)C(C)=C1C YUWFEBAXEOLKSG-UHFFFAOYSA-N 0.000 claims description 2
- 239000011630 iodine Substances 0.000 claims description 2
- 229910052740 iodine Inorganic materials 0.000 claims description 2
- BEZDDPMMPIDMGJ-UHFFFAOYSA-N pentamethylbenzene Chemical compound CC1=CC(C)=C(C)C(C)=C1C BEZDDPMMPIDMGJ-UHFFFAOYSA-N 0.000 claims description 2
- WQIQNKQYEUMPBM-UHFFFAOYSA-N pentamethylcyclopentadiene Chemical compound CC1C(C)=C(C)C(C)=C1C WQIQNKQYEUMPBM-UHFFFAOYSA-N 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- 125000001424 substituent group Chemical group 0.000 claims description 2
- 229910052723 transition metal Inorganic materials 0.000 claims description 2
- 150000003624 transition metals Chemical class 0.000 claims description 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims 2
- 239000004280 Sodium formate Substances 0.000 claims 1
- 229910000027 potassium carbonate Inorganic materials 0.000 claims 1
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 claims 1
- 235000019254 sodium formate Nutrition 0.000 claims 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 22
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 13
- 239000000543 intermediate Substances 0.000 abstract description 8
- 239000002994 raw material Substances 0.000 abstract description 8
- 239000000758 substrate Substances 0.000 abstract description 4
- 238000005580 one pot reaction Methods 0.000 abstract description 3
- 239000012847 fine chemical Substances 0.000 abstract description 2
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 66
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 46
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 26
- KFZMGEQAYNKOFK-UHFFFAOYSA-N isopropyl alcohol Natural products CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 24
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 238000004128 high performance liquid chromatography Methods 0.000 description 13
- 239000012071 phase Substances 0.000 description 13
- 238000001644 13C nuclear magnetic resonance spectroscopy Methods 0.000 description 12
- 238000000926 separation method Methods 0.000 description 12
- 238000005160 1H NMR spectroscopy Methods 0.000 description 11
- 239000012074 organic phase Substances 0.000 description 11
- 239000003208 petroleum Substances 0.000 description 11
- 239000008346 aqueous phase Substances 0.000 description 10
- 229910000404 tripotassium phosphate Inorganic materials 0.000 description 10
- 235000019798 tripotassium phosphate Nutrition 0.000 description 10
- 238000011914 asymmetric synthesis Methods 0.000 description 8
- RHQDFWAXVIIEBN-UHFFFAOYSA-N Trifluoroethanol Chemical compound OCC(F)(F)F RHQDFWAXVIIEBN-UHFFFAOYSA-N 0.000 description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- 238000005406 washing Methods 0.000 description 6
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 4
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 3
- JIDCBOBNGAZMLN-UHFFFAOYSA-N 1-phenyl-2-(2,2,2-trifluoroethoxy)ethanone Chemical compound FC(F)(F)COCC(=O)C1=CC=CC=C1 JIDCBOBNGAZMLN-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 235000010290 biphenyl Nutrition 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- BYEAHWXPCBROCE-UHFFFAOYSA-N 1,1,1,3,3,3-hexafluoropropan-2-ol Chemical compound FC(F)(F)C(O)C(F)(F)F BYEAHWXPCBROCE-UHFFFAOYSA-N 0.000 description 1
- HPFWZNWHCWZFBD-UHFFFAOYSA-N 1,1,2,2,3,3,4-heptafluorobutan-1-ol Chemical compound OC(F)(F)C(F)(F)C(F)(F)CF HPFWZNWHCWZFBD-UHFFFAOYSA-N 0.000 description 1
- YIHRGKXNJGKSOT-UHFFFAOYSA-N 1,1,2,2,3,3-hexafluorobutan-1-ol Chemical compound CC(F)(F)C(F)(F)C(O)(F)F YIHRGKXNJGKSOT-UHFFFAOYSA-N 0.000 description 1
- VUYQBMXVCZBVHP-UHFFFAOYSA-N 1,1-difluoroethanol Chemical compound CC(O)(F)F VUYQBMXVCZBVHP-UHFFFAOYSA-N 0.000 description 1
- KRVGXFREOJHJAX-UHFFFAOYSA-N 2-bromo-1-(4-methylphenyl)ethanone Chemical compound CC1=CC=C(C(=O)CBr)C=C1 KRVGXFREOJHJAX-UHFFFAOYSA-N 0.000 description 1
- 125000004204 2-methoxyphenyl group Chemical group [H]C1=C([H])C(*)=C(OC([H])([H])[H])C([H])=C1[H] 0.000 description 1
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 1
- 239000012327 Ruthenium complex Substances 0.000 description 1
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- 229930007927 cymene Natural products 0.000 description 1
- 125000003709 fluoroalkyl group Chemical group 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
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- 238000005457 optimization Methods 0.000 description 1
- 125000001037 p-tolyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1*)C([H])([H])[H] 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- PTMFUWGXPRYYMC-UHFFFAOYSA-N triethylazanium;formate Chemical group OC=O.CCN(CC)CC PTMFUWGXPRYYMC-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/18—Preparation of ethers by reactions not forming ether-oxygen bonds
- C07C41/26—Preparation of ethers by reactions not forming ether-oxygen bonds by introduction of hydroxy or O-metal groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/61—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups
- C07C45/64—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reactions not involving the formation of >C = O groups by introduction of functional groups containing oxygen only in singly bound form
Abstract
本发明涉及一种手性α‑氟代烷氧基醇(式I)及其制备方法。本发明所涉及的制备方法为一锅法不对称串联反应,包括步骤1):α‑溴代苯乙酮(式II)为原料,氟代烷基醇(式III)既是溶剂又是反应原料,添加1当量的磷酸钾为碱,50℃反应2小时,反应生成中间体(式IV);步骤2):直接往反应体系中加入手性二胺金属络合物做催化剂,甲酸和三乙胺做氢源,在氮气保护下,经不对称转移氢化得到手性α‑氟代烷氧基醇(式I)。该方法具有反应条件简单、温和,步骤经济性、原子经济性等绿色合成优点,而且底物适应范围广,对映选择性高,合成扥手性α‑氟代烷氧基醇在医药中间体以及和精细化工原料方面具有广阔的应用前景。
Description
技术领域
本发明属于绿色催化不对称合成技术领域,具体涉及一种手性α-氟代烷氧基醇及其不对称串联合成方法。
背景技术
手性α-氟代烷氧基醇是一种重要的医药中间体和化工原料,在药物化学里,含有这类官能团的化合物常常能够在增强药效的同时降低副反应。发明人从α-溴代芳基乙酮出发,氟代烷基醇既做原料又做溶剂经不对称串联反应直接合成手性α-氟代烷氧基醇,反应条件简单、温和,底物适应范围广,对映选择性高等优点。
发明内容
一种手性α-氟代烷氧基醇及其制备方法,以α-溴代苯乙酮和氟代烷基醇为原料,采用“两步一锅法”策略,不需分离纯化中间体,直接合成手性α-氟代烷氧基醇;步骤1):α-溴代苯乙酮(式II)和CxFyOH(式III)经亲核取代反应制备中间体IV;步骤2):中间体IV的不对称转移氢化制备手性α-氟代烷氧基醇I。
其中,R是烷基、烷基氧基、三氟甲基、芳基、卤素中的任意一种。
CxFyOH中,x为2-6,y为2-8,x、y均为整数。
CxFyOH选自C2H3F2OH、C2H2F3OH、C3HF6OH、C4H3F6OH、C4H2F7OH、C5H3F8OH中的任意一种。
上面给出的化合物的定义中,所用术语不论单独使用还是用在复合词中,代表如下取代基:
烷基:指直链或支链烷基;
芳基:指苯基,取代苯基;
卤素:指氟、氯、溴、碘;
所述步骤1):亲核取代反应的溶剂为氟代烷基醇溶液,CxFyOH溶液,x为2-6,y为2-8,x、y均为整数。
CxFyOH包括C2H3F2OH、C2H2F3OH、C3HF6OH、C4H3F6OH、C4H2F7OH、C5H3F8OH中的任意一种。
所述步骤1)亲核取代反应的碱为碳酸铯,碳酸钾,磷酸钾等,进一步优选为:磷酸钾。
所述步骤1):亲核取代反应温度为25-60℃,优选的反应温度为50℃,反应时间为2-3小时;
所述步骤2):不对称转移氢化反应所用催化剂为(R,R)-或(S,S)-N-单磺酰-二芳基手性乙二胺与过渡金属钌或铑或者铱的配合物;其结构通式如式V所示,
所述结构通式V中,M为Ru或Rh或Ir;
Ar为苯基或对甲氧基、甲基取代的苯基、萘基;
R为-CH3、-CF3、-C6H5、4-CH3C6H4、4-CF3C6H4、4-(t-Bu)-C6H4-、3,4-(CH3)2-C6H3-、2,4,6-(CH3)3-C6H2-、2,6-Cl2-C6H3-、2,4,6-(i-Pr)3-C6H2-、C6F5-、或萘基;
R为H、CH3或i-Pr;
L为苯、1,4-二甲基苯、1-甲基-4-异丙基苯、1,3,5-三甲基苯、1,2,3,4,5-五甲基苯、1,2,3,4,5,6-六甲基苯或五甲基环戊二烯;
X为Cl-、[OTf]-、[PF6]-、[BF4]-、[SbF6]-或手性磷酸阴离子;
所述步骤2):不对称转移氢化反应所用催化剂,进一步优选,代表性催化剂结构如下中的任意一种:
所述步骤2):不对称转移氢化,反应温度为35-60℃,进一步优选为:50℃。
本发明涉及一种手性α-氟代烷氧基醇(式I)及其制备方法。本发明所涉及的制备方法为一锅法不对称串联反应,包括步骤1):α-溴代苯乙酮(式II)为原料,CxFyOH(式III)既做溶剂又是反应原料,添加1当量的磷酸钾为碱,50℃反应2小时,反应生成中间体(式IV);步骤2):直接往反应体系中加入1mol%的手性二胺金属钌络合物做催化剂,5当量的甲酸:三乙胺(1.1:1)做氢源,在氮气保护下50℃反应6小时,经不对称转移氢化得到手性α-氟代烷氧基醇(式I)。“两步一锅法”,不需要分离纯化中间体,操作简便,该方法具有反应条件简单、温和,步骤经济性、原子经济性等绿色合成优点,而且底物适应范围广,对映选择性高,在合成手性α-氟代烷氧基醇医药中间体以及和精细化工原料方面具有广阔的应用前景。
具体实施方式
下面结合具体实施例,对本发明作进一步说明,但本发明并不限于以下实施例。
本发明中所用手性催化剂通用备方法,以催化剂5i合成为例:0.05mmol(S,S)-N-(4-三氟甲基)苯磺酰二苯基手性乙二胺,0.025mmol[Ru(cymene)]2Cl2溶解在0.5ml二氯甲烷中,加入0.05mmol三乙胺,室温下反应30分钟,水洗,水相用1ml二氯甲烷萃取3次,合并后浓缩至干得到催化剂5i,直接用于催化反应。
催化剂5a、5b、5c、5d、5e、5f、5g、5h采用与5i相同的工艺条件。
实施例1:(S)-1-苯基-2-(2,2,2-三氟乙氧基)乙烷-1-醇不对称合成
将0.25mmol的2-溴代苯乙酮加入到试管中,依次加入磷酸三钾0.25mmol,三氟乙醇溶液1ml,N2下,50℃反应2h,向反应液中直接加入1.25mmol的甲酸:三乙胺(1.1:1,摩尔比),再加入0.0l mmol催化剂(S,S-5e),氮气置换3次,50℃反应6h,结束后用水洗,水相用乙酸乙酯萃取3次,合并有机相浓缩至干,分离产率:47%(石油醚:乙酸乙酯=5:1),ee值为92%。HPLC分离条件:手性柱OD-H柱,流动相:正己烷/异丙醇=98:2(体积比),流速:1.0ml/min,波长:220nm,温度,25℃,t1=20.728min(minor),t2=24.766min(major).;1H NMR(400MHZ,CDCl3):δ=7.41-7.32(m,5H),4.94(dt,J1=2.4HZ,J2=8.8HZ,1H),4.00-3.88(m,2H),3.81(dd,J1=3.2HZ,J2=10HZ,1H),3.67(t,J=8.8HZ,1H);13C NMR(100MHZ,CDCl3):δ=139.52,128.56,128.18,126.17,124.00(q,J=278HZ,1C),76.75,72.93,69.27(q,J=34HZ,1C);HRMS(ESI)m/zcalcd for C10H11F3O2[M+Na]+=243.0610,found=243.0609.
以实施例1的工艺步骤为例,进行了分步的工艺条件的优化,具体如下:
对1-苯基-2-(2,2,2-三氟乙氧基)乙酮条件筛选,对碱、氢源、催化剂的种类、反应时间、温度以及催化剂用量进行优化。即不加催化剂以中间体酮为底物进行不对称转移氢化的相关工艺步骤。
1)1-苯基-2-(2,2,2-三氟乙氧基)乙酮的合成a
从表1中发现用K3PO4做碱,CF3CH2OH做溶剂,50℃下,N2保护,反应2小时有较好的产率。
进一步筛选第二步反应的手性催化剂和氢源a:
a Reaction conditions:Step1:2-Bromoacetophenone(1a;0.25mmol),1mL ofCF3CH2OH,50℃,2h,under N2 atmosphere.Step2:1mol%catalyst,[H]source(5eq.),50℃,under N2,6h,isolated yield;b 0.1mol%of(S,S)-5e.
实施例2:(S)-1-苯基-2-(2,2,2-三氟乙氧基)乙烷-1-醇不对称合成
将0.25mmol的2-溴代苯乙酮加入到试管中,依次加入磷酸三钾0.25mmol,三氟乙醇溶液1ml,N2下,50℃反应2h,向反应液中直接加入5当量的甲酸:三乙胺(1.1:1,摩尔比),再加入0.0l mmol催化剂(S,S-5e),氮气置换3次,50℃反应6h,结束后用水洗,水相用乙酸乙酯萃取3次,合并有机相浓缩至干,分离产率:90%(石油醚:乙酸乙酯=5:1),ee值为98%。HPLC分离条件:手性柱OD-H柱,流动相:正己烷/异丙醇=98:2(体积比),流速:1.0ml/min,波长:220nm,温度,25℃,t1=20.728min(minor),t2=24.766min(major).;1H NMR(400MHZ,CDCl3):δ=7.41-7.32(m,5H),4.94(dt,J1=2.4HZ,J2=8.8HZ,1H),4.00-3.88(m,2H),3.81(dd,J1=3.2HZ,J2=10HZ,1H),3.67(t,J=8.8HZ,1H);13C NMR(100MHZ,CDCl3):δ=139.52,128.56,128.18,126.17,124.00(q,J=278HZ,1C),76.75,72.93,69.27(q,J=34HZ,1C);HRMS(ESI)m/z calcd for C10H11F3O2[M+Na]+=243.0610,found=243.0609。
实施例3:(S)-1-(对甲苯基)-2-(2,2,2-三氟氧基)乙烷-1-醇的不对称合成
将0.25mmol的2-溴代对甲基苯乙酮加入到试管中,依次加入磷酸三钾0.25mmol,三氟乙醇溶液1ml,N2下,50℃反应2h,向反应液中直接加入1.25mmol的甲酸:三乙胺(1.1:1,摩尔比),再加入0.0l mmol催化剂(S,S-5e),氮气置换3次,50℃反应6h,结束后用水洗,水相用乙酸乙酯萃取3次,合并有机相浓缩至干,分离产率:87%(石油醚:乙酸乙酯=5:1),ee值为94%。HPLC分离条件:手性柱AD-H柱,流动相:正己烷/异丙醇=95:5(体积比),流速:1.0ml/min,波长:220nm,温度,25℃,t1=10.594min(minor),t2=12.571min(major);1HNMR(400MHz,CDCl3):δ=7.31(d,J=8Hz,2H),7.22(d,J=7.6Hz,2H),4.93(dd,J1=3.2Hz,J2=5.6Hz,1H),4.01-3.89(m,2H),3.78(dd,J1=2.8Hz,J2=10Hz,1H),3.68(t,J=8.4Hz,1H),2.40(s,3H);13C NMR(100MHz,CDCl3):δ=137.92,136.68,129.24,126.15,123.95(q,J=278Hz,1C),78.02,72.79,67.76(q,J=33Hz,1C),HRMS(ESI)m/z calcd for C11H13F3O2[M+Na]+=257.0765,found=257.0770。
实施例4:(S)-1-(2-甲氧基苯基)-2-(2,2,2-三氟乙氧基)乙烷-1-醇的不对称合成
将0.25mmol的2-溴-1-(2-甲氧基苯基)乙烷-1-酮加入到试管中,依次加入磷酸三钾0.25mmol,C2H2F3OH醇溶液1ml,N2下,50℃反应2h,向反应液中直接加入1.25mmol的甲酸:三乙胺(1.1:1,摩尔比),再加入0.0l mmol催化剂(S,S-5e),氮气置换3次,50℃反应6h,结束后用水洗,水相用乙酸乙酯萃取3次,合并有机相浓缩至干,分离产率:83%(石油醚:乙酸乙酯=5:1),ee值为88%。HPLC分离条件:手性柱AD-H柱,流动相:正己烷/异丙醇=95:5(体积比),流速:1.0ml/min,波长:220nm,温度,25℃,t1=15.691min(minor),t2=18.832min(major);1H NMR(400MHZ,CDCl3):δ=7.51(dd,J1=2HZ,J2=7.8HZ,1H),7.34-7.30(m,1H),7.18-7.13(m,2H),7.02(t,J=7.2HZ,1H),6.91(dd,J1=0.8HZ,J2=8.0HZ,1H),5.29(dd,J1=3.2HZ,J2=6.4HZ,1H),3.99-3.86(m,3H),3.85(s,3H),3.66(dd,J1=8.0HZ,J2=10.0HZ,1H),3.66(t,J=8.8HZ,1H);13C NMR(100MHZ,CDCl3):δ=13C NMR(101MHZ,CDCl3)δ156.22,128.86,128.01,127.05,124.14(q,J=278HZ,1C),120.80,110.29,76.62,68.56(q,J=34HZ,1C),68.43,55.16;;HRMS(ESI)m/z calcd for C11H13F3O3[M+Na]+=273.0714,found=273.0722。
实施例5:(S)--2-(2,2,2-三氟乙氧基)-1-(4-(三氟甲基)苯基)乙烷-1-醇的不对称合成
将0.25mmol 2-溴-1-(4-(三氟甲基)苯基)乙烷-1-酮的加入到试管中,依次加入磷酸三钾0.25mmol,三氟乙醇溶液1ml,N2下,50℃反应2h,向反应液中直接加入1.25mmol的甲酸:三乙胺(1.1:1,摩尔比),再加入0.0l mmol催化剂(S,S-5e),氮气置换3次,50℃反应6h,结束后用水洗,水相用乙酸乙酯萃取3次,合并有机相浓缩至干,分离产率:60%(石油醚:乙酸乙酯=5:1),ee值为94%。HPLC分离条件:手性柱OD-H柱,流动相:正己烷/异丙醇=90:10(体积比),流速:1.0ml/min,波长:220nm,温度,25℃,t1=9.146min(minor),t2=10.447min(major);1H NMR(400MHZ,CDCl3):δ=7.66(d,J=8HZ,2H),7.54(d,J=8HZ,2H),5.02(dd,J1=3.2HZ,J2=8.4HZ,1H),4.03-3.91(m,2H),3.84(dd,J1=3.2HZ,J2=10HZ,1H),3.67(t,J=8.4HZ,1H);13C NMR(100MHZ,CDCl3):δ=143.43,130.83,130.51,130.19,125.49,125.46,123.79(q,J=278HZ,1C),123.51(q,J=276HZ,1C),77.59,72.32,69.14(q,J=34.1HZ,1C)。
实施例6:(S)-1-(萘-2-基)-2-(2,2,2-三氟乙氧基)乙烷-1-醇的不对称合成
将0.25mmol的加入到试管中,依次加入磷酸三钾0.25mmol,C2H2F3OH醇溶液1ml,N2下,50℃反应2h,向反应液中直接加入1.25mmol的甲酸:三乙胺(1.1:1,摩尔比),再加入0.0l mmol催化剂(S,S-5e),氮气置换3次,50℃反应6h,结束后用水洗,水相用乙酸乙酯萃取3次,合并有机相浓缩至干,分离产率:60%(石油醚:乙酸乙酯=5:1),ee值为92%。HPLC分离条件:手性柱IA-H柱,流动相:正己烷/异丙醇=90:10(体积比),流速:1.0ml/min,波长:220nm,温度,25℃,t1=10.693min(minor),t2=11.762;1H NMR(400MHZ,CDCl3):δ=7.88(q,J=3.6HZ,4H),7.55-7.49(m,3H),5.12(dd,J1=3.2HZ,J2=8.8HZ,1H),4.03-3.89(m,3H),3.77(t,J=8.8HZ,1H);13C NMR(100MHZ,CDCl3):δ=136.99,133.28,133.23,128.36,128.04,127.76,126.34,126.18,125.33,124.01,123.54(q,J=278HZ,1C),77.93,77.42,77.10,76.79,73.07,68.83(q,J=34HZ,1C).HRMS(ESI)m/z calcd for C14H13F3O2[M+Na]+=293.0765,found=293.0768。
实施例7:(S)-1-([1,1'-联苯]-4-基)-2-溴乙烷-1-酮的不对称合成
将0.25mmol的1-([1,1'-联苯]-4-基)-2-溴乙烷-1-酮加入到试管中,依次加入磷酸三钾0.25mmol,三氟乙醇1ml,N2下,50℃反应2h,向反应液中直接加入1.25mmol的甲酸:三乙胺(1.1:1),再加入0.0l mmol催化剂(S,S-5e),氮气置换3次,50℃反应6h,结束后用水洗,水相用乙酸乙酯萃取3次,合并有机相浓缩至干,分离产率:87%(石油醚:乙酸乙酯=5:1),ee值为94%。HPLC分离条件:手性柱OD-H柱,流动相:正己烷/异丙醇=90:10(体积比),流速:1.0ml/min,波长:220nm,温度,25℃,t1=11.632min(minor),t2=13.707min(major);1H NMR(400MHZ,CDCl3):δ=7.66-7.64(m,4H),7.52-7.48(m,4H),7.44-7.39(m,1H),5.03(dd,J1=3.2HZ,J2=8.4HZ,1H),4.08-3.92(m,2H),3.88(dd,J1=3.2HZ,J2=10HZ,1H),3.75(t,J=9.2HZ,1H);13C NMR(100MHZ,CDCl3):δ=141.15,140.71,138.57,128.87,127.48,127.32,127.15,126.68,123.95(q,J=278HZ,1C),77.96,72.75,69.01(q,J=34HZ,1C).HRMS(ESI)m/z calcd for C16H15F3O2[M+Na]+=319.0922,found=319.0920。
实施例8:(S)-2-((1,1,1,3,3-六氟丙烷-2-基)氧基)-1-苯基乙烷-1-醇
将0.25mmol的2-溴苯乙酮加入到试管中,依次加入磷酸三钾0.25mmol,六氟异丙醇1ml,N2下,50℃反应2h,向反应液中直接加入1.25mmol的甲酸:三乙胺(1.1:1),再加入0.0l mmol催化剂(S,S-5e),氮气置换3次,50℃反应6h,结束后用水洗,水相用乙酸乙酯萃取3次,合并有机相浓缩至干,分离产率:88%(石油醚:乙酸乙酯=5:1),ee值为96%。HPLC分离条件:手性柱OD-H柱,流动相:正己烷/异丙醇=90:10(体积比),流速:1.0ml/min,波长:220nm,温度,25℃,t1=9.138min(minor),t2=11.174min(major);1H NMR(400MHZ,CDCl3):δ=7.43-7.37(m,5H),5.04(dt,J1=2.8HZ,J2=8.8HZ,1H),4.35(dt,J1=6HZ,J2=18HZ,1H),4.03(dd,J1=2.8HZ,J2=10.4HZ,1H),3.89(t,J=8.8HZ,1H),2.75(d,J=2.8HZ,1H);13C NMR(100MHZ,CDCl3):δ=138.80,128.70,128.48,126.17,122.80,120.02,79.73,76.34(dt,J1=32HZ,J2=97HZ),73.26.HRMS(ESI)m/z calcd for C11H10F6O2[M+Na]+=289.0663,found=289.0669。
实施例9:(S)-2-(2,2,3,3,4,4-七氟丁氧基)-1-苯基乙烷-1-醇
将0.25mmol的2-溴代苯乙酮加入到试管中,依次加入磷酸三钾0.25mmol,七氟丁醇1ml,N2下,50℃反应2h,向反应液中直接加入1.25mmol的甲酸:三乙胺(1.1:1),再加入0.0l mmol催化剂(S,S-5e),氮气置换3次,50℃反应6h,结束后用水洗,水相用乙酸乙酯萃取3次,合并有机相浓缩至干,分离产率90%(石油醚:乙酸乙酯=10:1),ee值为98%。HPLC分离条件:手性柱OD-H柱,流动相:正己烷/异丙醇=95:5(体积比),流速:1.0ml/min,波长:220nm,温度,25℃,t1=13.938min(minor),t2=16.079min(major);1H NMR(400MHz,CDCl3):δ=7.40-7.33(m,5H),4.95(dt,J1=2.8Hz,J2=8.8Hz,1H),4.15-3.98(m,2H),3.81(dd,J1=3.2Hz,J2=13.2Hz,1H),3.67(t,J=9.2Hz,1H);13C NMR(100MHz,CDCl3):δ=139.37,128.57,128.21,126.16,119.09,114.81,108.61,78.33,72.94,68.16(t,J=25Hz);HRMS(ESI)m/zcalcd for C12H11F7O2[M+Na]+=321.0726,found=321.0731。
实施例10:(S)-2-(2,2,3,4,4-六氟丁氧基)-1-苯基乙烷-1-醇
将0.25mmol的2-溴代苯乙酮加入到试管中,依次加入磷酸三钾0.25mmol,六氟丁醇1ml,N2下,50℃反应2h,向反应液中直接加入1.25mmol的甲酸:三乙胺(1.1:1),再加入0.0l mmol催化剂(S,S-5e),氮气置换3次,50℃反应6h,结束后用水洗,水相用乙酸乙酯萃取3次,合并有机相浓缩至干,分离产率87%(石油醚:乙酸乙酯=10:1),ee值为97%。HPLC分离条件:手性柱OD-H柱,流动相:正己烷/异丙醇=95:5(体积比),流速:1.0ml/min,波长:220nm,温度,25℃,t1=18.909min(minor),t2=21.458min(major);1H NMR(400MHZ,CDCl3):δ=7.40-7.32(m,5H),5.08-4.88(m,2H),4.02-3.64(m,4H),2.57(s,1H);13C NMR(100MHZ,CDCl3):δ=139.62,128.61,1128.29,126.11,77.78,77.65,72.91,69.31,68.97,68.71;HPLC(Chiralcel OD-H,n-hexane/i-PrOH=95/5(v/v),220nm,1.0mL/min,25℃),HRMS(ESI)m/zcalcd for C12H12F6O2[M+Na]+=325.0639,found=325.0642。
实施例11:(S)-2-(2,2-二氟乙氧基)-1-苯基乙烷-1-醇
将0.25mmol的2-溴代苯乙酮加入到试管中,依次加入磷酸三钾0.25mmol,二氟乙醇溶液1ml,N2下,50℃反应2h,向反应液中直接加入1.25mmol的甲酸:三乙胺(1.1:1),再加入0.0l mmol催化剂(S,S-5e),氮气置换3次,50℃反应6h,结束后用水洗,水相用乙酸乙酯萃取3次,合并有机相浓缩至干,分离产率90%(石油醚:乙酸乙酯=10:1),ee值为96%。HPLC分离条件:手性柱AD-H柱,流动相:正己烷/异丙醇=98:2(体积比),流速:1.0ml/min,波长:220nm,温度,25℃,t1=28.760min(minor),t2=34.347min(major);1H NMR(400MHZ,CDCl3):δ=7.40-7.31(m,5H),6.07-5.77(m,1H),4.93(dt,J1=2.4HZ,J2=8.8HZ,1H),3.81-3.70(m,3H),3.61(t,J=8.8HZ,1H),2.86(s,1H);13C NMR(100MHZ,CDCl3):δ=139.70,128.53,128.11,126.17,116.68,114.28,111.88,77.61,72.85,70.51(t,J=27HZ,1C);HPLC(ChiralcelAD-H,n-hexane/i-PrOH=98/2(v/v),220 nm,1.0 mL/min,25℃),HRMS(ESI)m/z calcd forC10H12F2O2[M+Na]+=225.0703,found=225.0713。
Claims (9)
2.根据权利要求1所述的制备方法,其特征在于,步骤(1)亲核取代反应的溶剂为:CxFyOH溶液,x为2-6,y为2-8,x、y均为整数。
3.根据权利要求2所述的制备方法,其特征在于,CxFyOH包括C2H3F2OH、C2H2F3OH、C3HF6OH、C4H3F6OH、C4H2F7OH、C5H3F8OH中的任意一种。
4.根据权利要求1所述的制备方法,其特征在于,步骤(1)亲核取代反应的碱为磷酸钾、碳酸铯、或碳酸钾。
5.根据权利要求1所述的制备方法,其特征在于,步骤(2)不对称转移氢化反应催化剂为:单磺酰手性二胺与金属钌、铑、铱的配合物。
6.根据权利要求5所述的不对称转移氢化反应催化剂,其特征在于,所述手性催化剂为(R,R)或(S,S)手性乙二胺与过渡金属钌或铑或者铱的络合物,其结构通式如式V所示,
所述结构通式V中,M为Ru或Rh或Ir;
Ar为苯基或对甲氧基、甲基取代的苯基、萘基;
R为-CH3、-CF3、-C6H5、4-CH3C6H4、4-CF3C6H4、4-(t-Bu)-C6H4-、3,4-(CH3)2-C6H3-、2,4,6-(CH3)3-C6H2-、2,6-Cl2-C6H3-、2,4,6-(i-Pr)3-C6H2-、C6F5、或萘基;
R为H、CH3、i-Pr;
L为苯、1,4-二甲基苯、1-甲基-4-异丙基苯、1,3,5-三甲基苯、1,2,3,4,5-五甲基苯、1,2,3,4,5,6-六甲基苯或五甲基环戊二烯;
X为Cl-、[OTf]-、[PF6]-、[BF4]-、[SbF6]-或手性磷酸阴离子。
7.根据权利要求1所述的制备方法,其特征在于,步骤(2)不对称转移氢化反应的氢源为:甲酸钠、甲酸/三乙胺的混合物。
8.根据权利要求1所述的制备方法,其特征在于,反应温度为25-60℃。
9.根据权利要求8所述的制备方法,其特征在于,反应温度为50℃。
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US20180256572A1 (en) * | 2017-03-10 | 2018-09-13 | Vps-3, Inc. | Metalloenzyme inhibitor compounds |
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Title |
---|
DINESH TALWAR等: ""Versatile Iridicycle Catalysts for Highly Efficient and Chemoselective Transfer Hydrogenation of Carbonyl Compounds in Water"", 《CHEM. EUR. J.》, vol. 20, pages 12835 - 12842, XP071840661, DOI: 10.1002/chem.201403701 * |
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