CN117623959A - 一种苏式-3-氟-n-9-苯基-9-芴-l-天冬氨酸叔丁酯的合成方法 - Google Patents
一种苏式-3-氟-n-9-苯基-9-芴-l-天冬氨酸叔丁酯的合成方法 Download PDFInfo
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- 238000001308 synthesis method Methods 0.000 title claims abstract description 10
- -1 -tert-butyl aspartate Chemical compound 0.000 title abstract description 4
- 229940009098 aspartate Drugs 0.000 title abstract description 4
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims abstract description 24
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims abstract description 12
- JGFZNNIVVJXRND-UHFFFAOYSA-N N,N-Diisopropylethylamine (DIPEA) Chemical compound CCN(C(C)C)C(C)C JGFZNNIVVJXRND-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229940125904 compound 1 Drugs 0.000 claims abstract description 10
- 229940125782 compound 2 Drugs 0.000 claims abstract description 10
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims abstract description 8
- HYQXNCDBSALQLB-UHFFFAOYSA-N 9-bromo-9-phenylfluorene Chemical compound C12=CC=CC=C2C2=CC=CC=C2C1(Br)C1=CC=CC=C1 HYQXNCDBSALQLB-UHFFFAOYSA-N 0.000 claims abstract description 7
- RLKHFSNWQCZBDC-UHFFFAOYSA-N n-(benzenesulfonyl)-n-fluorobenzenesulfonamide Chemical compound C=1C=CC=CC=1S(=O)(=O)N(F)S(=O)(=O)C1=CC=CC=C1 RLKHFSNWQCZBDC-UHFFFAOYSA-N 0.000 claims abstract description 7
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims abstract description 5
- 229940126214 compound 3 Drugs 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 10
- 230000002194 synthesizing effect Effects 0.000 claims 6
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 238000003786 synthesis reaction Methods 0.000 abstract description 5
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 9
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 4
- WKTWOKOOUAZXQP-NCGGTJAESA-N (2r,3r)-2-amino-3-fluorobutanedioic acid Chemical class OC(=O)[C@@H](N)[C@@H](F)C(O)=O WKTWOKOOUAZXQP-NCGGTJAESA-N 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 3
- 238000004440 column chromatography Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000012043 crude product Substances 0.000 description 3
- IAZDPXIOMUYVGZ-WFGJKAKNSA-N Dimethyl sulfoxide Chemical compound [2H]C([2H])([2H])S(=O)C([2H])([2H])[2H] IAZDPXIOMUYVGZ-WFGJKAKNSA-N 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 230000004071 biological effect Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- CKLJMWTZIZZHCS-REOHCLBHSA-N L-aspartic acid Chemical compound OC(=O)[C@@H](N)CC(O)=O CKLJMWTZIZZHCS-REOHCLBHSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000001093 anti-cancer Effects 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003327 cancerostatic effect Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 229940125898 compound 5 Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000012074 organic phase Substances 0.000 description 1
- 125000006239 protecting group Chemical group 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006268 reductive amination reaction Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
- C07C227/14—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof
- C07C227/18—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof by reactions involving amino or carboxyl groups, e.g. hydrolysis of esters or amides, by formation of halides, salts or esters
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C227/00—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton
- C07C227/14—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof
- C07C227/16—Preparation of compounds containing amino and carboxyl groups bound to the same carbon skeleton from compounds containing already amino and carboxyl groups or derivatives thereof by reactions not involving the amino or carboxyl groups
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2603/00—Systems containing at least three condensed rings
- C07C2603/02—Ortho- or ortho- and peri-condensed systems
- C07C2603/04—Ortho- or ortho- and peri-condensed systems containing three rings
- C07C2603/06—Ortho- or ortho- and peri-condensed systems containing three rings containing at least one ring with less than six ring members
- C07C2603/10—Ortho- or ortho- and peri-condensed systems containing three rings containing at least one ring with less than six ring members containing five-membered rings
- C07C2603/12—Ortho- or ortho- and peri-condensed systems containing three rings containing at least one ring with less than six ring members containing five-membered rings only one five-membered ring
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Abstract
本发明涉及一种苏式‑3‑氟‑N‑9‑苯基‑9‑芴‑L‑天冬氨酸叔丁酯的合成方法。主要解决目前缺少有效合成的技术问题。本发明的技术方案是,一种苏式‑3‑氟‑N‑9‑苯基‑9‑芴‑L‑天冬氨酸叔丁酯的合成方法,包括以下步骤:第一步,L‑天冬氨酸‑α‑叔丁酯‑β‑甲酯盐酸盐在DIEA作用下,在乙腈中与9‑溴‑9‑苯基芴反应生成化合物1,第二步,化合物1在四氢呋喃中在LDA作用下和NFSI反应生成化合物2,第三步,化合物2在四氢呋喃与水中与氢氧化锂生成目标化合物3,反应式如下:
Description
技术领域
本发明涉及苏式-3-氟-N-9-苯基-9-芴-L-天冬氨酸叔丁酯的合成方法。
背景技术
β-氟代天冬氨酸衍生物,作为多功能的有机合成片段广泛应用于制药领域中。比如,“医药化学杂志”Martinus J等人研究了β-氟代天冬氨酸有潜在的抗癌活性(Wanner MJ , Hageman J J M , Koomen G J ,et al.Potential carcinostatics. 4. Synthesisand biological properties of erythro- and threo-beta-fluoroaspartic acid anderythro-beta-fluoroasparagine.[J].Journal of Medicinal Chemistry, 1980, 23(1):85-7.)。“医药化学杂志”(Wanner M J , Hageman J J M , Koomen G J ,etal.Potential carcinostatics. 4. Synthesis and biological properties oferythro- and threo-beta-fluoroaspartic acid and erythro-beta-fluoroasparagine.[J].Journal of Medicinal Chemistry, 1980, 23(1):85-7.)报道的β-氟代天冬氨酸合成方式如下:
该方法以化合物4为起始原料,经过消除得到化合物5,再通过还原胺化得到化合物6。该方法主要得到以赤式为主的产物。
发明内容
本发明的目的是为了提供一种苏式-3-氟-N-9-苯基-9-芴-L-天冬氨酸叔丁酯的合成方法。主要解决其有效合成方法缺乏的技术问题。
本发明技术方案是,:一种苏式-3-氟-N-9-苯基-9-芴-L-天冬氨酸叔丁酯的合成方法,其特征是包括以下步骤:第一 步,冰浴下,L-天冬氨酸-α-叔丁酯-β-甲酯盐酸盐在DIEA(二异丙基乙胺)作用下,在乙腈中与9-溴-9-苯基芴反应生成化合物1; 第二步,在-78℃下,化合物1在四氢呋喃中,在LDA作用下与NFSI(N-氟代双苯磺酰胺)生成化合物2;第三步,化合物2在四氢呋喃与水中与氢氧化锂生成目标化合物3。
其合成反应式如下:
。
第一步L-天冬氨酸-α-叔丁酯-β-甲酯盐酸盐、DIEA和9-溴-9-苯基芴的摩尔比为1:2.4:1.2;反应时间为5小时。第二步化合物1、NFSI和LDA的摩尔比为1:2:2;反应时间2h。第三步化合物2、 氢氧化锂摩尔比是1:4,其中氢氧化锂浓度为1 mol/L;室温反应2h 。
LDA 为N,N二异丙基氨基锂 。
本发明的有益效果:本发明合成方法设计的合成路线简单;在整个合成过程中,原料和试剂便宜,中间体和目标产物易于纯化;填补了目标化合物工业化合成方法的空白。9-溴-9-苯基芴作为保护基有效屏蔽了α碳原子,从而有化学选择性在β位引入了氟原子,有效提高了原子利用率。NFSI是研究中发现的最为合适的氟试剂,在收率和生产放大上带来了极大的便利,带来了意料不到的技术效果。
具体实施方式
步骤1:
冰浴下,向三口烧瓶中加入乙腈(300 mL),搅拌状态下加入L-天冬氨酸-α-叔丁酯-β-甲酯盐酸盐(23.9 g, 0.1 mol),DIEA(30.96 g,0.24 mol)。反应温度控制在0-10℃以下。加完后,向反应液加入9-溴-9-苯基芴(38.52 g,0.12 mol)反应五小时。在冰浴下,把反应液缓慢倾倒到稀盐酸中以淬灭反应。再加入乙酸乙酯(300 mL)萃取,取有机相干燥,浓缩后柱层析,得到化合物1 (26.6g, 收率62%)。
HNMR (300 M, CDCl3),7.87~7.16(m, 13H),4.65~4.63(m, 2H), 3.06~3.0(m,1H), 1.134 (d, J = 7.2 Hz,9H)。
步骤2:
在-78℃下,向三口烧瓶中加入四氢呋喃2 L,化合物1(221 g, 0.5mol), LDA(1L, 1 mol/L), 反应半小时后加入NFSI,在-78℃下反应两小时至反应结束。 将反应液倒入稀盐酸中淬灭反应,用乙酸乙酯(700*3)萃取。用无水氯化镁干燥,过滤。滤液旋干得粗品。该粗品经柱层析分离后得化合物2 (195g,收率85%)。
HNMR (300 M, DMSO-d6), 7.87~7.16(m, 13H),4.65~4.63(m, 2H), 3.6(s,3H),3.06~3.0(m,1H), 1.134 (d, J = 7.2 Hz,9H)。
步骤3:
向三口烧瓶中加入化合物2(92.2g, 0.2mol),水500 mL, 四氢呋喃 500 mL和氢氧化锂(42g, 1 mol).该反应液在室温下搅拌两小时。将反应液倒入稀盐酸中淬灭反应,用乙酸乙酯(300*3)萃取。用无水氯化镁干燥,过滤。滤液旋干得粗品,该粗品经柱层析分离后得化合物3 (23g,收率47%)。
HNMR (300 M, CDCl3), 7.87~7.16(m, 13H),4.76~4.75(m, 0.5H), 4.65~4.63(m, 0.5H), 3.06~3.0(m, 1H), 1.134 (d, J = 7.2 Hz,9H)。
Claims (7)
1.一种苏式-3-氟-N-9-苯基-9-芴-L-天冬氨酸叔丁酯的合成方法,其特征是:包括以下步骤:第一步,L-天冬氨酸-α-叔丁酯-β-甲酯盐酸盐在DIEA作用下,在乙腈中与9-溴-9-苯基芴反应生成化合物1,第二步,化合物1在四氢呋喃中在LDA作用下和NFSI反应生成化合物2,第三步,化合物2在四氢呋喃与水中与氢氧化锂生成目标化合物3,反应式如下:
。
2.根据权利要求1所述的一种苏式-3-氟-N-9-苯基-9-芴-L-天冬氨酸叔丁酯的合成方法,其特征是:第一步L-天冬氨酸-α-叔丁酯-β-甲酯盐酸盐、DIEA和9-溴-9-苯基芴的摩尔比为1:2.4:1.2。
3.根据权利要求1所述的一种苏式-3-氟-N-9-苯基-9-芴-L-天冬氨酸叔丁酯的合成方法,其特征是:第一步在冰浴下反应5 小时。
4.根据权利要求1所述的一种苏式-3-氟-N-9-苯基-9-芴-L-天冬氨酸叔丁酯的合成方法,其特征是:第二步化合物1、NFSI和LDA的摩尔比为1:2:2。
5.根据权利要求1所述的一种苏式-3-氟-N-9-苯基-9-芴-L-天冬氨酸叔丁酯的合成方法,其特征是:第二步在-78℃反应2小时。
6.根据权利要求1所述的一种苏式-3-氟-N-9-苯基-9-芴-L-天冬氨酸叔丁酯的合成方法,其特征是:第三步化合物2、 氢氧化锂摩尔比是1:4,其中氢氧化锂浓度为1 mol/L。
7.根据权利要求1所述的一种苏式-3-氟-N-9-苯基-9-芴-L-天冬氨酸叔丁酯的合成方法,其特征是:第三步室温反应2小时。
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