CN117003694A - 一种高品质去屑剂吡罗克酮乙醇胺盐的制备方法 - Google Patents
一种高品质去屑剂吡罗克酮乙醇胺盐的制备方法 Download PDFInfo
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- CN117003694A CN117003694A CN202311284459.4A CN202311284459A CN117003694A CN 117003694 A CN117003694 A CN 117003694A CN 202311284459 A CN202311284459 A CN 202311284459A CN 117003694 A CN117003694 A CN 117003694A
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- Prior art keywords
- piroctone
- washing
- piroctone olamine
- ethyl acetate
- dandruff agent
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- BTSZTGGZJQFALU-UHFFFAOYSA-N piroctone olamine Chemical class NCCO.CC(C)(C)CC(C)CC1=CC(C)=CC(=O)N1O BTSZTGGZJQFALU-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 208000001840 Dandruff Diseases 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 229950001046 piroctone Drugs 0.000 claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- OIQJEQLSYJSNDS-UHFFFAOYSA-N piroctone Chemical compound CC(C)(C)CC(C)CC1=CC(C)=CC(=O)N1O OIQJEQLSYJSNDS-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000005406 washing Methods 0.000 claims abstract description 48
- 238000000034 method Methods 0.000 claims abstract description 41
- ZPSJGADGUYYRKE-UHFFFAOYSA-N 2H-pyran-2-one Chemical compound O=C1C=CC=CO1 ZPSJGADGUYYRKE-UHFFFAOYSA-N 0.000 claims abstract description 33
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000006243 chemical reaction Methods 0.000 claims abstract description 29
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 26
- 239000002904 solvent Substances 0.000 claims abstract description 26
- 239000003054 catalyst Substances 0.000 claims abstract description 23
- 238000001914 filtration Methods 0.000 claims abstract description 23
- 230000008569 process Effects 0.000 claims abstract description 20
- XZOYHFBNQHPJRQ-UHFFFAOYSA-N 7-methyloctanoic acid Chemical compound CC(C)CCCCCC(O)=O XZOYHFBNQHPJRQ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 150000003839 salts Chemical class 0.000 claims abstract description 14
- 229940081510 piroctone olamine Drugs 0.000 claims abstract description 13
- 238000005805 hydroxylation reaction Methods 0.000 claims abstract description 10
- 238000011084 recovery Methods 0.000 claims abstract description 8
- 238000004537 pulping Methods 0.000 claims abstract description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 123
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical group CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 claims description 59
- 239000012065 filter cake Substances 0.000 claims description 35
- 239000000706 filtrate Substances 0.000 claims description 29
- WTDHULULXKLSOZ-UHFFFAOYSA-N Hydroxylamine hydrochloride Chemical group Cl.ON WTDHULULXKLSOZ-UHFFFAOYSA-N 0.000 claims description 22
- 238000001035 drying Methods 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 19
- 238000010992 reflux Methods 0.000 claims description 18
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical group [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 14
- 238000004821 distillation Methods 0.000 claims description 13
- -1 piroctone ketone Chemical class 0.000 claims description 10
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 9
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 8
- 239000002253 acid Substances 0.000 claims description 7
- 239000012141 concentrate Substances 0.000 claims description 7
- 150000002443 hydroxylamines Chemical class 0.000 claims description 7
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 6
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 6
- 239000012295 chemical reaction liquid Substances 0.000 claims description 6
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 claims description 6
- ZNBNBTIDJSKEAM-UHFFFAOYSA-N 4-[7-hydroxy-2-[5-[5-[6-hydroxy-6-(hydroxymethyl)-3,5-dimethyloxan-2-yl]-3-methyloxolan-2-yl]-5-methyloxolan-2-yl]-2,8-dimethyl-1,10-dioxaspiro[4.5]decan-9-yl]-2-methyl-3-propanoyloxypentanoic acid Chemical compound C1C(O)C(C)C(C(C)C(OC(=O)CC)C(C)C(O)=O)OC11OC(C)(C2OC(C)(CC2)C2C(CC(O2)C2C(CC(C)C(O)(CO)O2)C)C)CC1 ZNBNBTIDJSKEAM-UHFFFAOYSA-N 0.000 claims description 5
- 229910000378 hydroxylammonium sulfate Inorganic materials 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 4
- 239000002585 base Substances 0.000 claims description 4
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 4
- 235000011181 potassium carbonates Nutrition 0.000 claims description 4
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 3
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- HYYHQASRTSDPOD-UHFFFAOYSA-N hydroxylamine;phosphoric acid Chemical compound ON.OP(O)(O)=O HYYHQASRTSDPOD-UHFFFAOYSA-N 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 claims description 3
- 239000011736 potassium bicarbonate Substances 0.000 claims description 3
- 229910000028 potassium bicarbonate Inorganic materials 0.000 claims description 3
- 235000015497 potassium bicarbonate Nutrition 0.000 claims description 3
- TYJJADVDDVDEDZ-UHFFFAOYSA-M potassium hydrogencarbonate Chemical compound [K+].OC([O-])=O TYJJADVDDVDEDZ-UHFFFAOYSA-M 0.000 claims description 3
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 3
- 239000001488 sodium phosphate Substances 0.000 claims description 3
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 3
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 3
- 239000008096 xylene Substances 0.000 claims description 3
- 238000010009 beating Methods 0.000 claims description 2
- 150000002169 ethanolamines Chemical class 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000001291 vacuum drying Methods 0.000 claims description 2
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 abstract description 15
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 abstract description 7
- 238000004128 high performance liquid chromatography Methods 0.000 description 10
- VHYFNPMBLIVWCW-UHFFFAOYSA-N 4-Dimethylaminopyridine Chemical compound CN(C)C1=CC=NC=C1 VHYFNPMBLIVWCW-UHFFFAOYSA-N 0.000 description 8
- DTQVDTLACAAQTR-UHFFFAOYSA-N Trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-N 0.000 description 8
- 239000008399 tap water Substances 0.000 description 6
- 235000020679 tap water Nutrition 0.000 description 6
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000003197 catalytic effect Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 206010061218 Inflammation Diseases 0.000 description 3
- 239000002537 cosmetic Substances 0.000 description 3
- 230000033444 hydroxylation Effects 0.000 description 3
- 230000004054 inflammatory process Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- VOLMSPGWNYJHQQ-UHFFFAOYSA-N Pyranone Natural products CC1=C(O)C(=O)C(O)CO1 VOLMSPGWNYJHQQ-UHFFFAOYSA-N 0.000 description 2
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 description 2
- 238000003556 assay Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 210000004761 scalp Anatomy 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 230000000699 topical effect Effects 0.000 description 2
- SNUSZUYTMHKCPM-UHFFFAOYSA-N 1-hydroxypyridin-2-one Chemical class ON1C=CC=CC1=O SNUSZUYTMHKCPM-UHFFFAOYSA-N 0.000 description 1
- GEKPNPPFAYJZRD-UHFFFAOYSA-N 3,5,5-trimethylhexanoyl chloride Chemical compound ClC(=O)CC(C)CC(C)(C)C GEKPNPPFAYJZRD-UHFFFAOYSA-N 0.000 description 1
- 238000005863 Friedel-Crafts acylation reaction Methods 0.000 description 1
- 206010017533 Fungal infection Diseases 0.000 description 1
- 241000233866 Fungi Species 0.000 description 1
- 241000555676 Malassezia Species 0.000 description 1
- 241000555688 Malassezia furfur Species 0.000 description 1
- 208000031888 Mycoses Diseases 0.000 description 1
- 208000003251 Pruritus Diseases 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 206010040844 Skin exfoliation Diseases 0.000 description 1
- 206010067197 Tinea manuum Diseases 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910000288 alkali metal carbonate Inorganic materials 0.000 description 1
- 150000008041 alkali metal carbonates Chemical class 0.000 description 1
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 1
- 238000005576 amination reaction Methods 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 229940121363 anti-inflammatory agent Drugs 0.000 description 1
- 239000002260 anti-inflammatory agent Substances 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 239000003429 antifungal agent Substances 0.000 description 1
- 229940121375 antifungal agent Drugs 0.000 description 1
- 239000003899 bactericide agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000011365 complex material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 208000035475 disorder Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 229940022353 herceptin Drugs 0.000 description 1
- 210000005007 innate immune system Anatomy 0.000 description 1
- 230000007803 itching Effects 0.000 description 1
- 230000002147 killing effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- LVWZTYCIRDMTEY-UHFFFAOYSA-N metamizole Chemical compound O=C1C(N(CS(O)(=O)=O)C)=C(C)N(C)N1C1=CC=CC=C1 LVWZTYCIRDMTEY-UHFFFAOYSA-N 0.000 description 1
- FZIBCCGGICGWBP-UHFFFAOYSA-N methyl 3-methylbut-2-enoate Chemical compound COC(=O)C=C(C)C FZIBCCGGICGWBP-UHFFFAOYSA-N 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
- 231100000344 non-irritating Toxicity 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229950004864 olamine Drugs 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 239000002453 shampoo Substances 0.000 description 1
- 238000001577 simple distillation Methods 0.000 description 1
- 208000010744 skin desquamation Diseases 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 230000001225 therapeutic effect Effects 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 201000004647 tinea pedis Diseases 0.000 description 1
- 230000001256 tonic effect Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
- C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
- C07D213/89—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members with hetero atoms directly attached to the ring nitrogen atom
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/33—Heterocyclic compounds
- A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
- A61K31/40—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil
- A61K31/4015—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with one nitrogen as the only ring hetero atom, e.g. sulpiride, succinimide, tolmetin, buflomedil having oxo groups directly attached to the heterocyclic ring, e.g. piracetam, ethosuximide
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/49—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds
- A61K8/4906—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with one nitrogen as the only hetero atom
- A61K8/4926—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing heterocyclic compounds with one nitrogen as the only hetero atom having six membered rings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P17/00—Drugs for dermatological disorders
- A61P17/04—Antipruritics
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
- A61P31/10—Antimycotics
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q5/00—Preparations for care of the hair
- A61Q5/006—Antidandruff preparations
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C213/00—Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton
- C07C213/08—Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton by reactions not involving the formation of amino groups, hydroxy groups or etherified or esterified hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C213/00—Preparation of compounds containing amino and hydroxy, amino and etherified hydroxy or amino and esterified hydroxy groups bound to the same carbon skeleton
- C07C213/10—Separation; Purification; Stabilisation; Use of additives
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/584—Recycling of catalysts
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Abstract
本发明公开了一种高品质去屑剂吡罗克酮乙醇胺盐的制备方法,使用3,7,9,9‑四甲基‑2‑癸烯‑5‑酮酸或异壬酸作为催化剂,催化4‑甲基‑6‑(2,4,4‑三甲基戊基)‑2‑吡喃酮(吡喃酮)进行羟胺化反应,反应液经溶剂回收、过滤、水洗、浓缩后,得到含有中间体1‑羟基‑4‑甲基‑6‑(2,4,4‑三甲基戊基)‑2‑(1H)‑吡啶酮(吡罗克酮)的溶液;滴加乙醇胺成盐,经打浆纯化,烘干,获得含量大于99.9%的去屑剂吡罗克酮乙醇胺盐。本发明使用3,7,9,9‑四甲基‑2‑癸烯‑5‑酮酸或异壬酸作为催化剂,羟胺化选择性提高至98.0%以上,羟胺化收率提高至86%以上,工序简单,便于操作,易于控制,易于实现。
Description
技术领域
本发明涉及抗菌剂的制备,尤其涉及高品质去屑剂吡罗克酮乙醇胺盐的制备。
背景技术
炎症是人类消除刺激并启动用于自我保护的愈合过程的机制。人类先天免疫系统是以非特异方式抵御入侵生物的第一道防线。失调的炎症可导致各种个人护理问题,包括头皮屑(头皮/头发上)。已经开发了多种通过局部应用或通过口服使用的抗炎剂,用于减轻上述问题。
头皮屑是一种全世界许多人都经历的状况。头皮屑状况从轻微的症状(如皮肤脱屑)到严重的炎症和头皮瘙痒不等。马拉色菌酵母(例如糠秕马拉色菌)被认为是导致头皮屑的主要原因。用于治疗头皮屑的常规使用的方法是局部应用抗真菌剂,例如吡罗克酮乙醇胺盐。
吡罗克酮乙醇胺盐/吡啶酮乙醇胺盐(PO),如下式所示,英文名称:Piroctoneolamine/Octopirox,化学式:C16H30N2O3,分子量:298.42g/mol,CAS号:68890-66-4,HSCODE:2933399099。
吡罗克酮乙醇胺盐是一种常用于治疗真菌感染的化合物,是一种高效、无毒无刺激的去屑剂,常被用于抗头皮屑洗发香波、养发液和护发素等洗护类化妆品中。对真菌、霉菌有广谱杀灭作用,对脚、手癣有良好的治疗功效。在化妆品中可作防腐剂,在香皂中作杀菌剂,并且有增稠性。在淋洗类产品中的最大允许使用浓度为1.0%,其它产品最大允许浓度为0.5%。
吡罗克酮乙醇胺盐的合成一般以4-甲基-6-(2,4,4-三甲基戊基)-2-吡喃酮(以下简称吡喃酮)为原料,经羟胺化制得关键中间体1-羟基-4-甲基-6-(2,4,4-三甲基戊基)-2-(1H)-吡啶酮(以下简称吡罗克酮),再与乙醇胺成盐制得吡罗克酮乙醇胺盐,如下式所示:
赫彻斯特股份公司专利US4916228公开了一种制备吡罗克酮乙醇胺盐的方法,以吡喃酮和硫酸羟胺或盐酸羟胺为原料,以与羟胺等当量的碱金属碳酸盐或碱金属碳酸氢盐作为催化剂和缚酸剂,额外添加少量水催化制备中间体吡罗克酮,回流反应20h后,反应结束,加入乙酸乙酯过滤除去盐,所得滤液经水洗,浓缩后加入乙醇胺成盐,制得吡罗克酮乙醇胺盐,总收率50-60%。羟胺化催化剂便宜易得,成本低,工艺的可行性高;但该法在催化羟胺化的过程中,容易产生较多的杂质,难以获得高品质的PO,且PO的总收率为50-60%不高。
为提高吡罗克酮的收率,赫彻斯特股份公司的专利US5756749A在羟胺化时引入三氟乙酸,催化吡喃酮与硫酸羟胺和碳酸钠反应制备中间体吡罗克酮,回流反应15h后结束反应,加入浓硫酸释放出三氟乙酸,蒸馏回收正庚烷和三氟乙酸;再加入乙酸乙酯,过滤除去盐,滤液与乙醇胺成盐,以63%的收率获得吡罗克酮乙醇胺盐。工艺新颖,收率相对该公司前述专利提高;但该工艺催化体系复杂,需要额外添加三氟乙酸,成本增大,三废增加;反应时间长,产生的杂质较多,难以获得高品质的PO,且PO的总收率为63%不高。
CN110818632 B以4-二甲氨基吡啶(DMAP)为催化剂,二氯甲烷为溶剂,催化吡喃酮与盐酸羟胺在35-45℃下反应8-12小时,来制备中间体吡罗克酮,反应结束,经乙酸乙酯萃取,水洗,加入乙醇胺成盐,以总收率80.46%获得PO,纯度99.6%。该法工艺条件温和,且仅需DMAP作为碱性物质,催化剂用量低,工艺的可操作性高;但DMAP价格昂贵,成本高,且回收困难,难以从产品中去除。
CN112159352B公开了一种制备PO的方法,在二氯甲烷中,吡喃酮、盐酸羟胺、甲醇钠、少量水和乙酸混合后,回流反应18h;经水洗,浓缩后加入乙酸乙酯,再加入乙醇胺成盐,烘干得到PO成品,总收率82.8%。反应条件温和,工艺后处理简单;但使用混合溶剂,物料相对复杂,洗涤次数多,收率低,未给出纯度的报道。山东师范大学硕士论文(1-羟基吡啶酮类化合物的合成研究,2011)采用与专利CN112159352B几乎相同的方法制备PO,总收率仅73.2%,依然不高。
CN115784981A公开了吡罗克酮乙醇胺盐制备工艺,以3 ,5 ,5-三甲基己酰氯、异戊烯酸甲酯为原料、三氯化铝做催化剂条件下进行付克酰基化反应得到3,7,9,9-四甲基-2-癸烯-5-酮酸甲酯,再经环化反应合成4-甲基-6-(2,4,4-三甲基戊基)-2-吡喃酮,与盐酸羟胺进行羟胺化合成1-羟基-4-甲基-6-(2,4 ,4-三甲戊基)-2-吡啶酮,再与乙醇胺反应成盐得到产品。该方法羟胺化、成盐两步收率为77%,依然不高。
发明内容
本发明人研究发现,使用3,7,9,9-四甲基-2-癸烯-5-酮酸或异壬酸作为催化剂,催化4-甲基-6-(2,4,4-三甲基戊基)-2-吡喃酮(吡喃酮)进行羟胺化反应,反应液经溶剂回收、过滤、水洗、浓缩后,得到中间体1-羟基-4-甲基-6-(2,4,4-三甲基戊基)-2-(1H)-吡啶酮(吡罗克酮)的浓缩溶液;滴加乙醇胺成盐,经打浆纯化,烘干,获得含量大于99.9%的去屑剂吡罗克酮乙醇胺盐,从而完成了本发明。
本发明的目的在于提供以下方面:
1. 一种高品质去屑剂吡罗克酮乙醇胺盐的制备方法,该方法包括以下步骤:
(1)制备吡罗克酮:通过使用3,7,9,9-四甲基-2-癸烯-5-酮酸或异壬酸作为催化剂,催化4-甲基-6-(2,4,4-三甲基戊基)-2-吡喃酮(吡喃酮)进行羟胺化反应,得到吡罗克酮反应液;
(2)纯化吡罗克酮:将吡罗克酮反应液,经溶剂回收、过滤、水洗、浓缩得到吡罗克酮浓缩液;
(3)制备吡罗克酮乙醇胺盐:向吡罗克酮浓缩液滴加乙醇胺成盐,经打浆,烘干,得到高品质去屑剂吡罗克酮乙醇胺盐。
2.如上述1所述的高品质去屑剂吡罗克酮乙醇胺盐的制备方法,其中,3,7,9,9-四甲基-2-癸烯-5-酮酸或异壬酸的用量为吡喃酮重量的3-8%。
3.如上述2所述的高品质去屑剂吡罗克酮乙醇胺盐的制备方法,其中,3,7,9,9-四甲基-2-癸烯-5-酮酸或异壬酸的用量为吡喃酮重量的5-7%。
4.如上述1所述的高品质去屑剂吡罗克酮乙醇胺盐的制备方法,步骤(1)包括:
将催化剂3,7,9,9-四甲基-2-癸烯-5-酮酸或异壬酸,与羟胺盐、碱、吡喃酮和溶剂混合后,加热回流反应,
所述羟胺盐选自盐酸羟胺盐酸羟胺、硫酸羟胺、或磷酸羟胺等;
所述碱选自碳酸钠、碳酸氢钠、碳酸钾、碳酸氢钾、氢氧化钠、氢氧化钾、氢氧化钙、氧化钙、磷酸钠、三乙胺、或吡啶等;
所述溶剂选自庚烷、石油醚、甲苯、二甲苯、氯苯、DMF、或乙酸乙酯等。
5. 如上述1所述的高品质去屑剂吡罗克酮乙醇胺盐的制备方法,步骤(2)中,
所述溶剂回收通过常压蒸馏进行。
6. 如上述1所述的高品质去屑剂吡罗克酮乙醇胺盐的制备方法,步骤(2)中,
所述过滤,通过加入乙酸乙酯进行。
7. 如上述1所述的高品质去屑剂吡罗克酮乙醇胺盐的制备方法,步骤(2)包括:
溶剂回收:将步骤(1)所得反应液,常压加热,112-114℃下,收集溶剂,馏底液I待用;
过滤:将馏底液I降温至60-70℃,加入乙酸乙酯,于50-60℃保温后,过滤,用乙酸乙酯打洗滤饼,收集滤液;
水洗:①向滤液中加入水,在50-60℃下搅拌洗涤,静置,分液,得到油相I和水相I;②油相I中加入水,在50-60℃下搅拌洗涤,静置,分液,得到油相II和水相II;③油相II中加入水,在50-60℃下搅拌洗涤,静置,分液,得到油相III和水相III;
浓缩:油相III常压蒸馏,蒸馏温度73-79℃,回收乙酸乙酯,得馏底物料II,即吡罗克酮浓缩液。
8. 如上述1所述的高品质去屑剂吡罗克酮乙醇胺盐的制备方法,步骤(3)中,向吡罗克酮浓缩液滴加乙醇胺成盐包括:
在45-50℃下,向吡罗克酮浓缩液中滴加乙醇胺,并保温,降温至0-5℃并保温,过滤,用乙酸乙酯打洗滤饼,得到滤饼I和滤液I。
9. 如上述8所述的高品质去屑剂吡罗克酮乙醇胺盐的制备方法,步骤(3)中,打浆包括:
将滤饼I用乙酸乙酯打洗,升温回流,再降温至20-25℃并保温,过滤,用乙酸乙酯打洗滤饼,得到滤饼II和滤液II。
10. 如上述9所述的高品质去屑剂吡罗克酮乙醇胺盐的制备方法,步骤(3)中,烘干包括:
将滤饼II真空烘干,其中,在真空度10-15mmHg下,分别于25-30℃烘干,于30-35℃烘干,于35-40℃烘干;然后,在真空度3-5mmHg下,分别于45-50℃烘干,于65-70℃烘干。
本发明所具有的有益效果包括:
(1)本发明中,在制备吡罗克酮中,使用3,7,9,9-四甲基-2-癸烯-5-酮酸或异壬酸作为催化剂,其可高效催化吡喃酮进行羟胺化反应,羟胺化选择性提高至98.0%以上,羟胺化收率提高至86%以上;
(2)本发明中,在制备吡罗克酮中,使用3,7,9,9-四甲基-2-癸烯-5-酮酸或异壬酸作为催化剂,不仅催化效率高,选择性高,而且不会引入新的杂质,为制备高品质吡罗克酮提供了良好基础;
(3)本发明中,通过简捷的蒸馏回收溶剂、水洗、浓缩得到浓度适宜的吡罗克酮浓缩液,可直接用于接下的成盐,工序简单,便于操作;
(4)采用本发明方法,可得到高品质吡罗克酮乙醇胺盐,其含量高达99.9%以上;
(5)本发明方法,所有物料均回收利用,不产生废弃物或排放物,环保指数高;
(6)本发明方法,整体工艺简单,操作便捷,易于控制,易于实现。
相比而言,目前已报道的方法,或者反应时间长,收率低,使得PO的生产成本高;或者反应工序复杂,或添加额外的催化剂,虽可提高收率,但不可避免的引起其它问题,如催化剂价格昂贵,催化剂难以回收,催化剂难以从产品中去除,工艺复杂,工业化操作难度大等;此外,还存在所制备的PO纯度较低,难以满足洗护化妆品行业对高品质PO的需求等问题。
具体实施方式
下面通过实施例对本发明进一步详细说明。通过这些说明,本发明的特点和优点将变得更为清楚明确。
在这里专用的词“示例性”意为“用作例子、实施例或说明性”。这里作为“示例性”所说明的任何实施例不必解释为优于或好于其它实施例。
在本发明中,采用3,7,9,9-四甲基-2-癸烯-5-酮酸或者异壬酸作为吡喃酮羟胺化的催化剂,其催化效率高,反应选择性高,能促使吡喃酮高效率反应为吡罗克酮。
在本发明的优选实施方式中,3,7,9,9-四甲基-2-癸烯-5-酮酸或异壬酸的用量为吡喃酮重量的3-8%,优选为5-7%,此时吡喃酮基本完全反应,羟胺化选择性达98.0%以上,羟胺化收率达86%以上。
为了确保羟胺化反应效果,在优选的实施方式中,制备吡罗克酮如下进行:将催化剂3,7,9,9-四甲基-2-癸烯-5-酮酸或异壬酸,与羟胺盐、碱、吡喃酮和溶剂混合后,加热回流反应。
所述羟胺盐选自盐酸羟胺盐酸羟胺、硫酸羟胺、或磷酸羟胺等,更优选盐酸羟胺;
所述碱选自碳酸钠、碳酸氢钠、碳酸钾、碳酸氢钾、氢氧化钠、氢氧化钾、氢氧化钙、氧化钙、磷酸钠、三乙胺、或吡啶等,更优选碳酸钠或碳酸钾;
所述溶剂选自庚烷、石油醚、甲苯、二甲苯、氯苯、DMF、或乙酸乙酯等,更优选庚烷。
回流反应5小时以上,优选8小时以上。
在本发明中,对于得到的吡罗克酮反应液,进行溶剂回收、过滤、水洗、浓缩,得到含量为30-40%的吡罗克酮浓缩溶液,其可直接用于与乙醇胺的成盐反应工艺,简单易行。
其中,对于溶剂回收,可以采用常压蒸馏进行,蒸馏出步骤(1)中所用溶剂并回收,循环使用。
在使用庚烷作为溶剂的情况下,112-114℃蒸馏,蒸馏收集庚烷。
对于所得馏底液I,可如下进行过滤:降温至60-70℃,加入乙酸乙酯,于50-60℃保温,优选30min以上,过滤,用乙酸乙酯打洗滤饼,收集滤液。
对于所得滤液,优选多次水洗,更优选3次水洗,例如:①向滤液中加入水,在50-60℃下搅拌洗涤,静置,分液,得到油相I和水相I;②油相I中加入水,在50-60℃下搅拌洗涤,静置,分液,得到油相II和水相II;③油相II中加入水,在50-60℃下搅拌洗涤,静置,分液,得到油相III和水相III。
本发明人特别注重物料的循环使用,所述水相I、水相II和水相III都可以循环用于水洗,避免废物排放,降低用水量。
对于所得油相III,进行蒸馏纯化。在常压下,蒸馏去除溶剂,如乙酸乙酯和庚烷等,此时蒸馏优选在73-79℃进行。当然,这些溶剂也可以回收利用。
蒸馏得到馏底物料,即为浓度适宜的吡罗克酮溶液。其中,由于羟胺化反应的高转化率、高选择性,以及使用不引入杂质的催化剂,所得溶液中杂质含量低,可直接用于接下来的成盐工序。
在优选的实施方式中,在45-50℃下,向吡罗克酮浓缩液中滴加乙醇胺,并保温,优选1h以上,降温至0-5℃并保温,优选1h以上,过滤,用乙酸乙酯打洗滤饼,得到滤饼I和滤液I。
将滤饼I用乙酸乙酯打洗,升温回流,再降温至20-25℃并保温,优选1h以上,过滤,用乙酸乙酯打洗滤饼,得到滤饼II和滤液II。
优选地,滤液I和滤液II回收利用。
对于滤饼II,优选进行真空程序烘干,例如:在真空度10-15mmHg下,分别于25-30℃烘干1-3h,于30-35℃烘干1-3h,于35-40℃烘干1-3h;然后,在真空度3-5mmHg下,分别于45-50℃烘干1-3h,于65-70℃烘干,直至达到LOD(干燥失重)≤0.25%。
实施例
以下通过具体实例进一步描述本发明,不过这些实例仅仅是范例性的,并不对本发明的保护范围构成任何限制。
实施例1
(1)制备吡罗克酮(羟胺化):在干燥洁净的带搅拌、温度计、回流分水装置的1L四口烧瓶中,加入10.8g 3,7,9,9-四甲基-2-癸烯-5-酮酸、138.28g盐酸羟胺、104.72g碳酸钠、105.8g正庚烷和157.1g吡喃酮,开启搅拌,升温回流,84℃开始回流,将温度控制在88-94℃范围(部分采水),回流反应8h,当HPLC检测吡喃酮≤2%,结束反应,共采出35.0g水,取样,HPLC:吡罗克酮 98.12%,吡喃酮0.32%,吡喃酮转化率99.68%,羟胺化反应选择性98.12%÷99.68%=98.4%。
(2)纯化吡罗克酮:
溶剂回收:反应结束,升温,开始常压采出正庚烷,至釜温达到112-114℃,采集正庚烷结束,得89.0g正庚烷(GC:正庚烷99.3%),用于下批羟胺化反应套用,馏底液I待用。正庚烷蒸馏结束,取样,HPLC:吡罗克酮98.69%,吡喃酮0.23%。
过滤:馏底液I降温至60℃,加入332g乙酸乙酯,于50℃保温30min后过滤,并用150g乙酸乙酯打洗滤饼,得121.0g滤饼和587.8g滤液(取样测外标:含吡罗克酮0.6132mol,吡喃酮0.0031mol,吡罗克酮收率87.6%),收集滤液用于后续水洗工序。
水洗:在洁净的带温度计、搅拌、冷凝管的1L四口烧瓶中加入587.8g滤液I和100g自来水,50℃搅拌洗涤30min,静置10min分液,得594.3g油相I和87.3g水相I,油相I中加入100g自来水,50℃搅拌洗涤30min,静置10min分液,得121.04g水相II和570.4g油相II,水相II下批水洗套用,油相II中加入100g自来水,50℃搅拌洗涤30min,静置10min分液,得110.8g水相III和556.5g油相III,油相III进行浓缩,水相III下批水洗套用。
浓缩:在干燥洁净、带温度计、蒸馏装置的1L四口烧瓶中加入556.5g油相III,常压蒸馏,烧瓶温度74-75℃,得162.5g回收乙酸乙酯(GC, 乙酸乙酯99.52%,正庚烷0.48%)和421.7g馏底物料II(吡罗克酮外标含量34.5%,吡罗克酮收率87.57%)。
(3)制备吡罗克酮乙醇胺盐:
成盐:在干燥洁净的带搅拌、温度计、冷凝器的1L四口烧瓶中加入421.7g馏底物料II,升温至45℃,于0.5h内滴加39.3g乙醇胺,滴加结束,于45℃保温2h,降温至0℃保温1h,过滤,并用100g乙酸乙酯0℃打洗滤饼,得194.6g滤饼I(取样测HPLC,吡罗克酮乙醇胺盐99.8557%)和242.4g滤液I,滤液I回收。
打浆:在干燥洁净的带温度计、搅拌器、回流冷凝管的1L四口烧瓶中,加入194.6g滤饼I和389.2g乙酸乙酯,升温回流30min,再降温至20℃保温1h,过滤,并用40g乙酸乙酯20℃打洗滤饼,得195.2g滤饼II(取样测HPLC,吡罗克酮乙醇胺盐99.9698%)和361.6g滤液II。滤饼II去烘干工序,滤液II下批成盐套用。
烘干:在干燥洁净的真空烘箱中放入195.2g滤饼II,控制真空度10-15mmHg,于25℃烘2h,30℃烘1h,35℃烘1h;真空度3-5mmHg,45℃烘2h,65℃烘干至LOD<0.25%,得180.19g吡罗克酮乙醇胺盐,收率98.5%(基于吡罗克酮)。
所得吡罗克酮乙醇胺盐质量指标测试如下表所示:
实施例2
(1)制备吡罗克酮(羟胺化):在干燥洁净的带搅拌、温度计、回流分水装置的1L四口烧瓶中,加入9.7g异壬酸、138.28g盐酸羟胺、104.72g碳酸钠、105.8g正庚烷和157.1g吡喃酮,开启搅拌,升温回流,84℃开始回流,将釜内温度控制在88-94℃范围(部分采水),回流反应8h,当HPLC检测吡喃酮≤2%,结束反应,共采出36.2g水,取样,HPLC,吡罗克酮97.92%,吡喃酮0.64%,吡喃酮转化率99.36%,羟胺化反应选择性97.92%÷99.36%=98.6%。
(2)纯化吡罗克酮:
溶剂回收:反应结束,升温,开始常压采出正庚烷,至釜温达到112-114℃,采集正庚烷结束,得96.7g正庚烷(GC:正庚烷99.32%),用于下批羟胺化反应套用,馏底液I待用。正庚烷蒸馏结束,取样,HPLC:吡罗克酮98.69%,吡喃酮0.23%。
过滤:馏底液I降温至70℃,加入332g乙酸乙酯,于60℃保温30min后过滤,并用150g乙酸乙酯打洗滤饼,得118.9g滤饼和588.4g滤液(取样测外标:含吡罗克酮0.6062mol,吡喃酮0.0042mol,吡罗克酮收率86.6%,收集滤液用于后续水洗工序。
水洗:在洁净的带温度计、搅拌、冷凝管的1L四口烧瓶中加入588.4滤液I和100g自来水,60℃搅拌洗涤30min,静置10min分液,得601.2g油相I和86.7g水相I,油相I中加入100g自来水,60℃搅拌洗涤30min,静置10min分液,得121.6g水相II和578.9g油相II,水相II下批水洗套用,油相II中加入100g自来水,60℃搅拌洗涤30min,静置10min分液,得109.9g水相III和568.5g油相III,油相III进行浓缩,水相III下批水洗套用。
浓缩:在干燥洁净、带温度计、蒸馏装置的1L四口烧瓶中加入568.5g油相III,常压蒸馏,烧瓶温度77-78℃,得142.0g回收乙酸乙酯(GC, 乙酸乙酯99.52%,正庚烷0.48%)和421.2g馏底物理II(吡罗克酮外标含量34.1%,吡罗克酮收率86.4%)。
(3)制备吡罗克酮乙醇胺盐:
成盐:在干燥洁净的带搅拌、温度计、冷凝器的1L四口烧瓶中加入421.2g馏底物料II,升温至50℃,于0.5h内滴加38.8g乙醇胺,滴加结束,于45℃保温2h,降温至5℃保温1h,过滤,并用100g乙酸乙酯5℃打洗滤饼,得194.1g 滤饼I(取样测HPLC,吡罗克酮乙醇胺盐99.8525%)和246.4g滤液I,滤液I回收。
打浆:在干燥洁净的带温度计、搅拌器、回流冷凝管的1L四口烧瓶中,加入1194.1g滤饼I和388.2g乙酸乙酯,升温回流30min,再降温至25℃保温1h,过滤,并用40g乙酸乙酯25℃打洗滤饼,得193.9g滤饼II(取样测HPLC,吡罗克酮乙醇胺盐99.9727%)和367.4g滤液II。滤饼II去烘干工序,滤液II下批成盐套用。
烘干:在干燥洁净的真空烘箱中放入193.9g滤饼II,控制真空度10-15mmHg,于30℃烘2h,35℃烘1h,40℃烘1h;真空度3-5mmHg,50℃烘2h,70℃烘干至LOD<0.25%,得177.42g吡罗克酮乙醇胺盐,收率98.3%(基于吡罗克酮)。
所得吡罗克酮乙醇胺盐质量指标测试如下表所示:
以上结合优选实施方式和范例性实例对本发明进行了详细说明。不过需要声明的是,这些具体实施方式仅是对本发明的阐述性解释,并不对本发明的保护范围构成任何限制。在不超出本发明精神和保护范围的情况下,可以对本发明技术内容及其实施方式进行各种改进、等价替换或修饰,这些均落入本发明的保护范围内。本发明的保护范围以所附权利要求为准。
Claims (10)
1.一种高品质去屑剂吡罗克酮乙醇胺盐的制备方法,其特征在于,该方法包括以下步骤:
(1)制备吡罗克酮:通过使用3,7,9,9-四甲基-2-癸烯-5-酮酸或异壬酸作为催化剂,催化吡喃酮进行羟胺化反应,得到吡罗克酮反应液;
(2)纯化吡罗克酮:将吡罗克酮反应液,经溶剂回收、过滤、水洗、浓缩得到吡罗克酮浓缩液;
(3)制备吡罗克酮乙醇胺盐:向吡罗克酮浓缩液滴加乙醇胺成盐,经打浆,烘干,得到高品质去屑剂吡罗克酮乙醇胺盐。
2.如权利要求1所述的高品质去屑剂吡罗克酮乙醇胺盐的制备方法,其特征在于,3,7,9,9-四甲基-2-癸烯-5-酮酸或异壬酸的用量为吡喃酮重量的3-8%。
3.如权利要求2所述的高品质去屑剂吡罗克酮乙醇胺盐的制备方法,其特征在于,3,7,9,9-四甲基-2-癸烯-5-酮酸或异壬酸的用量为吡喃酮重量的5-7%。
4.如权利要求1所述的高品质去屑剂吡罗克酮乙醇胺盐的制备方法,步骤(1)包括:
将催化剂3,7,9,9-四甲基-2-癸烯-5-酮酸或异壬酸,与羟胺盐、碱、吡喃酮和溶剂混合后,加热回流反应,
所述羟胺盐选自盐酸羟胺、硫酸羟胺、或磷酸羟胺;
所述碱选自碳酸钠、碳酸氢钠、碳酸钾、碳酸氢钾、氢氧化钠、氢氧化钾、氢氧化钙、氧化钙、磷酸钠、三乙胺、或吡啶;
所述溶剂选自庚烷、石油醚、甲苯、二甲苯、氯苯、DMF、或乙酸乙酯。
5.如权利要求1所述的高品质去屑剂吡罗克酮乙醇胺盐的制备方法,其特征在于,步骤(2)中,
所述溶剂回收通过常压蒸馏进行。
6.如权利要求1所述的高品质去屑剂吡罗克酮乙醇胺盐的制备方法,其特征在于,步骤(2)中,
所述过滤通过加入乙酸乙酯进行。
7.如权利要求1所述的高品质去屑剂吡罗克酮乙醇胺盐的制备方法,其特征在于,步骤(2)包括:
溶剂回收:将步骤(1)所得反应液常压加热,112-114℃下,收集溶剂,馏底液I待用;
过滤:将馏底液I降温至60-70℃,加入乙酸乙酯,于50-60℃保温后,过滤,用乙酸乙酯打洗滤饼,收集滤液;
水洗:①向滤液中加入水,在50-60℃下搅拌洗涤,静置,分液,得到油相I和水相I;②油相I中加入水,在50-60℃下搅拌洗涤,静置,分液,得到油相II和水相II;③油相II中加入水,在50-60℃下搅拌洗涤,静置,分液,得到油相III和水相III;
浓缩:油相III常压蒸馏,蒸馏温度73-79℃,回收乙酸乙酯,得馏底物料II,即吡罗克酮浓缩液。
8.如权利要求1所述的高品质去屑剂吡罗克酮乙醇胺盐的制备方法,其特征在于,步骤(3)中,向吡罗克酮浓缩液滴加乙醇胺成盐包括:
在45-50℃下,向吡罗克酮浓缩液中滴加乙醇胺,并保温,降温至0-5℃并保温,过滤,用乙酸乙酯打洗滤饼,得到滤饼I和滤液I。
9.如权利要求8所述的高品质去屑剂吡罗克酮乙醇胺盐的制备方法,其特征在于,步骤(3)中,打浆包括:
将滤饼I用乙酸乙酯打洗,升温回流,再降温至20-25℃并保温,过滤,用乙酸乙酯打洗滤饼,得到滤饼II和滤液II。
10.如权利要求9所述的高品质去屑剂吡罗克酮乙醇胺盐的制备方法,其特征在于,步骤(3)中,烘干包括:
将滤饼II真空烘干,其中,在真空度10-15mmHg下,分别于25-30℃烘干,于30-35℃烘干,于35-40℃烘干;然后,在真空度3-5mmHg下,分别于45-50℃烘干,于65-70℃烘干。
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