CN117430513A - 环丙基胺的合成新方法 - Google Patents
环丙基胺的合成新方法 Download PDFInfo
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- HTJDQJBWANPRPF-UHFFFAOYSA-N Cyclopropylamine Chemical compound NC1CC1 HTJDQJBWANPRPF-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000002194 synthesizing effect Effects 0.000 title claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- PAAZPARNPHGIKF-UHFFFAOYSA-N 1,2-dibromoethane Chemical compound BrCCBr PAAZPARNPHGIKF-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 8
- LYGJENNIWJXYER-UHFFFAOYSA-N nitromethane Chemical compound C[N+]([O-])=O LYGJENNIWJXYER-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 8
- 239000003513 alkali Substances 0.000 claims abstract description 5
- 238000006722 reduction reaction Methods 0.000 claims abstract description 5
- SYSLARHICMEYEQ-UHFFFAOYSA-N nitrocyclopropane Chemical compound [O-][N+](=O)C1CC1 SYSLARHICMEYEQ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000002904 solvent Substances 0.000 claims abstract description 4
- 239000010413 mother solution Substances 0.000 claims abstract description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 6
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 6
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 6
- 239000012452 mother liquor Substances 0.000 claims description 5
- 239000012074 organic phase Substances 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910021626 Tin(II) chloride Inorganic materials 0.000 claims description 3
- 230000009471 action Effects 0.000 claims description 3
- 239000003054 catalyst Substances 0.000 claims description 3
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 3
- QDRKDTQENPPHOJ-UHFFFAOYSA-N sodium ethoxide Chemical compound [Na+].CC[O-] QDRKDTQENPPHOJ-UHFFFAOYSA-N 0.000 claims description 3
- 235000011150 stannous chloride Nutrition 0.000 claims description 3
- YONPGGFAJWQGJC-UHFFFAOYSA-K titanium(iii) chloride Chemical compound Cl[Ti](Cl)Cl YONPGGFAJWQGJC-UHFFFAOYSA-K 0.000 claims description 3
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 claims description 2
- OCJBOOLMMGQPQU-UHFFFAOYSA-N 1,4-dichlorobenzene Chemical compound ClC1=CC=C(Cl)C=C1 OCJBOOLMMGQPQU-UHFFFAOYSA-N 0.000 claims description 2
- BMYNFMYTOJXKLE-UHFFFAOYSA-N 3-azaniumyl-2-hydroxypropanoate Chemical compound NCC(O)C(O)=O BMYNFMYTOJXKLE-UHFFFAOYSA-N 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 2
- KWYHDKDOAIKMQN-UHFFFAOYSA-N N,N,N',N'-tetramethylethylenediamine Chemical compound CN(C)CCN(C)C KWYHDKDOAIKMQN-UHFFFAOYSA-N 0.000 claims description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 2
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 claims description 2
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 2
- 229910000147 aluminium phosphate 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
- 239000007810 chemical reaction solvent Substances 0.000 claims description 2
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 229940117389 dichlorobenzene Drugs 0.000 claims description 2
- 229960002089 ferrous chloride Drugs 0.000 claims description 2
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- ODZPKZBBUMBTMG-UHFFFAOYSA-N sodium amide Chemical compound [NH2-].[Na+] ODZPKZBBUMBTMG-UHFFFAOYSA-N 0.000 claims description 2
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 claims description 2
- 235000019345 sodium thiosulphate Nutrition 0.000 claims description 2
- 239000007858 starting material Substances 0.000 claims description 2
- AXZWODMDQAVCJE-UHFFFAOYSA-L tin(II) chloride (anhydrous) Chemical compound [Cl-].[Cl-].[Sn+2] AXZWODMDQAVCJE-UHFFFAOYSA-L 0.000 claims description 2
- 239000008096 xylene Substances 0.000 claims description 2
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims 3
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 claims 2
- 238000001308 synthesis method Methods 0.000 claims 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 claims 1
- 238000010791 quenching Methods 0.000 claims 1
- 230000000171 quenching effect Effects 0.000 claims 1
- WBHQBSYUUJJSRZ-UHFFFAOYSA-M sodium bisulfate Chemical compound [Na+].OS([O-])(=O)=O WBHQBSYUUJJSRZ-UHFFFAOYSA-M 0.000 claims 1
- 229910000342 sodium bisulfate Inorganic materials 0.000 claims 1
- 239000000047 product Substances 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000012043 crude product Substances 0.000 abstract 2
- 239000002253 acid Substances 0.000 abstract 1
- 239000006227 byproduct Substances 0.000 abstract 1
- 238000006555 catalytic reaction Methods 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 238000005406 washing Methods 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000009776 industrial production Methods 0.000 description 4
- 238000010992 reflux Methods 0.000 description 4
- 238000007167 Hofmann rearrangement reaction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 239000005708 Sodium hypochlorite Substances 0.000 description 2
- 150000001408 amides Chemical class 0.000 description 2
- 238000009903 catalytic hydrogenation reaction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000543 intermediate Substances 0.000 description 2
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 2
- TXUICONDJPYNPY-UHFFFAOYSA-N (1,10,13-trimethyl-3-oxo-4,5,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl) heptanoate Chemical compound C1CC2CC(=O)C=C(C)C2(C)C2C1C1CCC(OC(=O)CCCCCC)C1(C)CC2 TXUICONDJPYNPY-UHFFFAOYSA-N 0.000 description 1
- GAOKKFIDHLTAAB-UHFFFAOYSA-N C(C)N(CC)CC.C[O-].[Na+] Chemical compound C(C)N(CC)CC.C[O-].[Na+] GAOKKFIDHLTAAB-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- GSNUFIFRDBKVIE-UHFFFAOYSA-N DMF Natural products CC1=CC=C(C)O1 GSNUFIFRDBKVIE-UHFFFAOYSA-N 0.000 description 1
- 150000007945 N-acyl ureas Chemical class 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- IGSKHXTUVXSOMB-UHFFFAOYSA-N cyclopropylmethanamine Chemical compound NCC1CC1 IGSKHXTUVXSOMB-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004009 herbicide Substances 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- ZUVVLBGWTRIOFH-UHFFFAOYSA-N methyl 4-methyl-2-[(4-methylphenyl)sulfonylamino]pentanoate Chemical compound COC(=O)C(CC(C)C)NS(=O)(=O)C1=CC=C(C)C=C1 ZUVVLBGWTRIOFH-UHFFFAOYSA-N 0.000 description 1
- MCSAJNNLRCFZED-UHFFFAOYSA-N nitroethane Chemical compound CC[N+]([O-])=O MCSAJNNLRCFZED-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- -1 pd/C Chemical compound 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 229940072132 quinolone antibacterials Drugs 0.000 description 1
- 238000006462 rearrangement reaction Methods 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000004289 sodium hydrogen sulphite Substances 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 239000001119 stannous chloride Substances 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 239000002351 wastewater Substances 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
- C07C209/30—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds
- C07C209/32—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups
- C07C209/325—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups reduction by other means than indicated in C07C209/34 or C07C209/36
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
- C07C201/06—Preparation of nitro compounds
- C07C201/12—Preparation of nitro compounds by reactions not involving the formation of nitro groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/02—Systems containing only non-condensed rings with a three-membered ring
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
本发明公开了一种合成环丙基胺的新方法;以硝基甲烷为原料,与1,2‑二溴乙烷在碱的催化作用下,在溶剂中进行脱氢环化反应,得到硝基环丙烷粗品,再经还原反应制备得到环丙基胺;母液经酸洗、过滤分层、常压精馏得到含量99%以上的纯品,收率80%以上。该合成路线的条件温和、副产少、收率高,环境友好,非常适合工业化。
Description
技术领域
本发明涉及一种环丙基胺的合成新方法,属于医药中间体合成技术领域。
背景技术
环丙基胺作为一种三元环的脂肪胺是合成喹诺酮类抗菌药的重要中间体或原料,也可用于除草剂或杀虫剂中,应用十分广泛,随着环丙基胺下游产品需求量的增加,环丙基胺的市场潜力十分巨大。目前工业上在合成环丙基胺的最后一步中主要分为两类,即催化加氢反应和霍夫曼重排反应;而催化加氢所用原料通常成本较高,对设备要求也比较高,反应条件苛刻,因此霍夫曼重排制环丙基胺仍为目前工业生产中的主流工艺。
霍夫曼重排反应作为经典化学反应,在工业生产中大多数仍采用次氯酸钠和氢氧化钠进行反应,该种条件下霍夫曼重排存在众多副反应,如酰胺的水解生成羧酸、酰胺过度氧化导致的酰基脲的生成;次氯酸钠的制备通常需要利用氯气,而氯气的运输存在一定的问题,大大限制了工业生产。
发明内容
针对以上问题,本发明提供一种改进的环丙基胺的合成路线,采用硝基甲烷为原料,与1,2-二溴乙烷在碱的催化剂作用下,在溶剂中进行脱氢环化,再经还原反应制备得到环丙基胺,具体机理及步骤如下:
(1)第一步,以硝基乙烷为起始原料,在一定量的溶剂中,以一定的摩尔比,一定的反应温度下,在碱作用下与1,2-二溴乙烷反应,得到硝基环丙烷母液,再经还原反应得到环丙基胺。
(2)第二步,将一定浓度稀盐酸缓慢加入到反应母液中,搅拌数小时后静置分层,有机相经常压精馏后得到环丙基胺成品。
进一步地,在上述方案中,第一步所述反应溶剂为THF、DMF、乙酸乙酯、甲苯、二甲苯、氯苯、二氯苯、乙腈、乙醇和乙醚中的至少一种;
进一步地,在上述方案中,第一步所述的硝基甲烷、1,2-二溴乙烷、碱的摩尔比为1:1~2.0:2.5~4;
进一步地,在上述方案中,第一步所述反应温度为-20~180℃,反应时间为10~20h;
进一步地,在上述方案中,第一步所述碱性催化剂为碳酸氢钠、碳酸钠、碳酸钾、碳酸铯、氢氧化钠、氢氧化锂、氢氧化钾、三乙胺甲醇钠、乙醇钠、氨基钠和TMEDA中至少一种;
进一步地,在上述方案中,第一步所述还原反应中还原剂为二氯化锡、三氯化钛、氯化亚铁、铁粉、亚硫酸氢钠、硫代硫酸钠、水合肼、Pd/C和Raney Ni等中至少一种;
进一步地,在上述方案中,第二步所述淬灭剂为盐酸、硫酸、磷酸中、氢溴酸和硝酸中至少一种;
进一步地,在上述方案中,第二步所述淬灭剂浓度为1~10%。
(1)本发明的合成路线:反应条件温和、收率高,产品质量稳定。
(2)本发明的制备工艺:流程简单,原料易得,无需过多配套设备,几乎无废水产生,环境友好,适合较大规模的工业化生产,具有很高的经济价值和社会意义。
【实施例1】环丙基胺的合成
第一步,1000ml四口瓶中,氮气保护下,先加入500ml乙醇,升温到30℃,再加入15.25g(0.25mol)硝基甲烷和106g(1.0mol)碳酸钠;开启搅拌,缓慢滴加1,2-二溴乙烷56.4g(0.3mol),反应2h后升温回流,保温反应3h~5h,再加69.4g(0.45mol)三氯化钛回流反应6~8h;TLC检测反应,结束降温到-10℃。
第二步,将300g浓度1%的稀盐酸缓慢滴加到反应母液中,搅拌0.5h,然后静置分液,有机相经常压蒸馏得到产品环丙基胺10.44g,其纯度为99.2%、收率为73.3%。
【实施例2】环丙基胺的合成
第一步,1000ml四口瓶中,氮气保护下,先加入500ml乙酸乙酯,降温到0℃,再加入15.25g(0.25mol)硝基甲烷和110.4g(0.8mol)碳酸钾;开启搅拌,缓慢滴加1,2-二溴乙烷47.0g(0.25mol),反应8h后升温回流,保温反应6h~8h,再加入0.424g(0.004mol)Pd/C常压加氢反应10~12h;TLC检测反应,结束降温到-10℃。
第二步,将300g浓度1%的稀盐酸缓慢滴加到反应母液中,搅拌0.5h,然后静置分液,有机相经常压蒸馏得到产品环丙基胺11.4g,其纯度为99.8%、收率为80.1%。
【实施例3】环丙基甲胺的合成
第一步,1000ml四口瓶中,氮气保护下,先加入500ml四氢呋喃,降温到-20℃,再加入15.25g(0.25mol)硝基甲烷和54.4g(0.8mol)乙醇钠;开启搅拌,缓慢滴加1,2-二溴乙烷56.4g(0.3mol),反应4~8h后升温回流,保温反应10~12h,再加入180.4g(0.8mol)氯化亚锡反应16~20h;TLC检测反应,结束降温到-10℃。
第二步,将500g浓度1%的稀盐酸缓慢滴加到反应母液中,搅拌0.5h,然后静置分液,有机相经常压蒸馏得到产品环丙基胺10.1g,其纯度为99.1%、收率为70.8%。
Claims (8)
1.一种环丙基胺的合成新方法,其特征在于包括以下两个合成步骤:
(1)以硝基甲烷为起始原料,在一定量的溶剂中,以一定的摩尔比,一定的反应温度下,在碱作用下与1,2-二溴乙烷反应,得到硝基环丙烷母液,再经还原反应得到环丙基胺;
(2)将一定浓度稀盐酸缓慢加入到反应母液中,搅拌数小时后静置分层,有机相经常压精馏后得到环丙基胺成品。
2.根据权利要求1所述一种环丙基胺合成新方法,其特征在于步骤(1)所述反应溶剂为乙腈、乙醇、乙醚、甲苯、二甲苯、氯苯、二氯苯、THF、DMF和乙酸乙酯中的至少一种。
3.根据权利要求1所述一种环丙基胺的合成新方法,其特征在于步骤(1)所述和硝基甲烷和1,2-二溴乙烷、碱的摩尔比为1:1~2.0:2.5~4。
4.根据权利要求1所述一种环丙基胺合成新方法,其特征在于步骤(1)所述碱性催化剂为碳酸氢钠、碳酸钠、碳酸钾、碳酸铯、氢氧化钠、氢氧化锂、氢氧化钾、三乙胺甲醇钠、乙醇钠、氨基钠和TMEDA中至少一种。
5.根据权利要求1所述一种环丙基胺合成新方法,其特征在于步骤(1)所述反应温度为-20~180℃,反应时间为10~30h。
6. 根据权利要求1所述一种环丙基胺合成新方法,其特征在于步骤(1)所述还原反应中的还原剂为二氯化锡、三氯化钛、氯化亚铁、铁粉、亚硫酸氢钠、硫代硫酸钠、水合肼、Pd/C和Raney Ni等中至少一种。
7.根据权利要求1所述一种环丙基胺合成新方法,其特征在于步骤(2)所述淬灭剂为盐酸、硫酸、磷酸中、氢溴酸和硝酸中至少一种。
8.根据权利要求1所述一种环丙基胺合成新方法,其特征在于步骤(2)所述淬灭剂浓度为1~10%。
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