BE572479A

BE572479A -

Info

Publication number: BE572479A
Authority: BE; Belgium
Prior art keywords: group; compound; general formula; treatment; dichloroacetylation
Prior art date

Application number

Other languages

English (en)

French (fr)

Publication of BE572479A publication Critical patent/BE572479A/fr

Links

150000001875 compounds Chemical class 0.000 claims description 107
238000000034 method Methods 0.000 claims description 56
PLIKAWJENQZMHA-UHFFFAOYSA-N 4-aminophenol Chemical compound NC1=CC=C(O)C=C1 PLIKAWJENQZMHA-UHFFFAOYSA-N 0.000 claims description 26
-1 dichloroacetyl group Chemical group 0.000 claims description 22
230000007062 hydrolysis Effects 0.000 claims description 22
238000006460 hydrolysis reaction Methods 0.000 claims description 22
125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 16
KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 15
125000000217 alkyl group Chemical group 0.000 claims description 15
238000002360 preparation method Methods 0.000 claims description 15
239000002253 acid Substances 0.000 claims description 10
BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 10
CIUQDSCDWFSTQR-UHFFFAOYSA-N [C]1=CC=CC=C1 Chemical class [C]1=CC=CC=C1 CIUQDSCDWFSTQR-UHFFFAOYSA-N 0.000 claims description 9
VAYGXNSJCAHWJZ-UHFFFAOYSA-N dimethyl sulfate Chemical compound COS(=O)(=O)OC VAYGXNSJCAHWJZ-UHFFFAOYSA-N 0.000 claims description 9
125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 9
125000001412 tetrahydropyranyl group Chemical group 0.000 claims description 9
125000002485 formyl group Chemical group [H]C(*)=O 0.000 claims description 8
125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 7
FBCCMZVIWNDFMO-UHFFFAOYSA-N dichloroacetyl chloride Chemical compound ClC(Cl)C(Cl)=O FBCCMZVIWNDFMO-UHFFFAOYSA-N 0.000 claims description 6
229910052500 inorganic mineral Inorganic materials 0.000 claims description 6
239000011707 mineral Substances 0.000 claims description 6
UFVLRHXFRXZBHS-UHFFFAOYSA-N 3,3,3-trichloro-2-hydroxypropanenitrile Chemical compound N#CC(O)C(Cl)(Cl)Cl UFVLRHXFRXZBHS-UHFFFAOYSA-N 0.000 claims description 5
101100439662 Arabidopsis thaliana CHR5 gene Proteins 0.000 claims description 5
239000003513 alkali Substances 0.000 claims description 5
125000003342 alkenyl group Chemical group 0.000 claims description 5
238000006243 chemical reaction Methods 0.000 claims description 5
INQOMBQAUSQDDS-UHFFFAOYSA-N iodomethane Chemical compound IC INQOMBQAUSQDDS-UHFFFAOYSA-N 0.000 claims description 5
229910000027 potassium carbonate Inorganic materials 0.000 claims description 5
125000002777 acetyl group Chemical group [H]C([H])([H])C(*)=O 0.000 claims description 4
239000011230 binding agent Substances 0.000 claims description 4
125000001309 chloro group Chemical group Cl* 0.000 claims description 4
JXTHNDFMNIQAHM-UHFFFAOYSA-N dichloroacetic acid Chemical compound OC(=O)C(Cl)Cl JXTHNDFMNIQAHM-UHFFFAOYSA-N 0.000 claims description 4
BUDQDWGNQVEFAC-UHFFFAOYSA-N Dihydropyran Chemical compound C1COC=CC1 BUDQDWGNQVEFAC-UHFFFAOYSA-N 0.000 claims description 3
TUCNEACPLKLKNU-UHFFFAOYSA-N acetyl Chemical compound C[C]=O TUCNEACPLKLKNU-UHFFFAOYSA-N 0.000 claims description 3
RQHMQURGSQBBJY-UHFFFAOYSA-N (2,2-dichloroacetyl) 2,2-dichloroacetate Chemical compound ClC(Cl)C(=O)OC(=O)C(Cl)Cl RQHMQURGSQBBJY-UHFFFAOYSA-N 0.000 claims description 2
DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 claims description 2
101100294115 Caenorhabditis elegans nhr-4 gene Proteins 0.000 claims description 2
STZZWJCGRKXEFF-UHFFFAOYSA-N Dichloroacetonitrile Chemical compound ClC(Cl)C#N STZZWJCGRKXEFF-UHFFFAOYSA-N 0.000 claims description 2
239000003518 caustics Substances 0.000 claims description 2
229960005215 dichloroacetic acid Drugs 0.000 claims description 2
238000011065 in-situ storage Methods 0.000 claims description 2
FAIAAWCVCHQXDN-UHFFFAOYSA-N phosphorus trichloride Chemical compound ClP(Cl)Cl FAIAAWCVCHQXDN-UHFFFAOYSA-N 0.000 claims description 2
239000012022 methylating agents‎ Substances 0.000 claims 3
ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims 1
239000002262 Schiff base Substances 0.000 claims 1
150000004753 Schiff bases Chemical class 0.000 claims 1
230000021736 acetylation Effects 0.000 claims 1
238000006640 acetylation reaction Methods 0.000 claims 1
125000004429 atom Chemical group 0.000 claims 1
239000000460 chlorine Substances 0.000 claims 1
229910052801 chlorine Inorganic materials 0.000 claims 1
230000022244 formylation Effects 0.000 claims 1
238000006170 formylation reaction Methods 0.000 claims 1
239000000126 substance Substances 0.000 claims 1
239000000203 mixture Substances 0.000 description 43
UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 42
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 36
239000007787 solid Substances 0.000 description 29
239000000243 solution Substances 0.000 description 29
HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 27
238000002844 melting Methods 0.000 description 22
230000008018 melting Effects 0.000 description 22
LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 17
VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 17
JNGZXGGOCLZBFB-IVCQMTBJSA-N compound E Chemical compound N([C@@H](C)C(=O)N[C@@H]1C(N(C)C2=CC=CC=C2C(C=2C=CC=CC=2)=N1)=O)C(=O)CC1=CC(F)=CC(F)=C1 JNGZXGGOCLZBFB-IVCQMTBJSA-N 0.000 description 17
CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 14
150000002148 esters Chemical class 0.000 description 14
238000001914 filtration Methods 0.000 description 14
238000010992 reflux Methods 0.000 description 12
230000011987 methylation Effects 0.000 description 11
238000007069 methylation reaction Methods 0.000 description 11
RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 10
238000003756 stirring Methods 0.000 description 10
WIWSJWAXUVHJBW-UHFFFAOYSA-N 2,2-dichloro-n-(4-hydroxyphenyl)acetamide Chemical compound OC1=CC=C(NC(=O)C(Cl)Cl)C=C1 WIWSJWAXUVHJBW-UHFFFAOYSA-N 0.000 description 8
238000004364 calculation method Methods 0.000 description 8
239000000047 product Substances 0.000 description 8
WYODKEXCSBRCDL-UHFFFAOYSA-N [4-(methylamino)phenyl] benzoate Chemical compound C1=CC(NC)=CC=C1OC(=O)C1=CC=CC=C1 WYODKEXCSBRCDL-UHFFFAOYSA-N 0.000 description 7
WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 6
JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 6
ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 6
229940049953 phenylacetate Drugs 0.000 description 6
WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 5
239000000706 filtrate Substances 0.000 description 5
CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 4
QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
BRWPSNHSOBHFQP-UHFFFAOYSA-N [4-(methylamino)phenyl] acetate Chemical compound CNC1=CC=C(OC(C)=O)C=C1 BRWPSNHSOBHFQP-UHFFFAOYSA-N 0.000 description 4
LOCNFWNVXOMBSH-UHFFFAOYSA-N [4-[(2,2-dichloroacetyl)amino]phenyl] acetate Chemical compound CC(=O)OC1=CC=C(NC(=O)C(Cl)Cl)C=C1 LOCNFWNVXOMBSH-UHFFFAOYSA-N 0.000 description 4
HUMNYLRZRPPJDN-UHFFFAOYSA-N benzaldehyde Chemical compound O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 description 4
238000001816 cooling Methods 0.000 description 4
LVTJOONKWUXEFR-FZRMHRINSA-N protoneodioscin Natural products O(C[C@@H](CC[C@]1(O)[C@H](C)[C@@H]2[C@]3(C)[C@H]([C@H]4[C@@H]([C@]5(C)C(=CC4)C[C@@H](O[C@@H]4[C@H](O[C@H]6[C@@H](O)[C@@H](O)[C@@H](O)[C@H](C)O6)[C@@H](O)[C@H](O[C@H]6[C@@H](O)[C@@H](O)[C@@H](O)[C@H](C)O6)[C@H](CO)O4)CC5)CC3)C[C@@H]2O1)C)[C@H]1[C@H](O)[C@H](O)[C@H](O)[C@@H](CO)O1 LVTJOONKWUXEFR-FZRMHRINSA-N 0.000 description 4
BDKLKNJTMLIAFE-UHFFFAOYSA-N 2-(3-fluorophenyl)-1,3-oxazole-4-carbaldehyde Chemical compound FC1=CC=CC(C=2OC=C(C=O)N=2)=C1 BDKLKNJTMLIAFE-UHFFFAOYSA-N 0.000 description 3
BVTLIIQDQAUXOI-UHFFFAOYSA-N 4-(benzylideneamino)phenol Chemical compound C1=CC(O)=CC=C1N=CC1=CC=CC=C1 BVTLIIQDQAUXOI-UHFFFAOYSA-N 0.000 description 3
MOXTXYMFGOOPHY-UHFFFAOYSA-N C(C1=CC=CC=C1)(=O)OC1=CC=C(C=C1)NC(C(Cl)Cl)=O Chemical compound C(C1=CC=CC=C1)(=O)OC1=CC=C(C=C1)NC(C(Cl)Cl)=O MOXTXYMFGOOPHY-UHFFFAOYSA-N 0.000 description 3
OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
238000004458 analytical method Methods 0.000 description 3
239000007864 aqueous solution Substances 0.000 description 3
238000009835 boiling Methods 0.000 description 3
229910052757 nitrogen Inorganic materials 0.000 description 3
UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 3
235000017281 sodium acetate Nutrition 0.000 description 3
229940087562 sodium acetate trihydrate Drugs 0.000 description 3
239000011343 solid material Substances 0.000 description 3
IFIWFBLNBUMQKX-UHFFFAOYSA-N (4-formamidophenyl) benzoate Chemical compound C1=CC(NC=O)=CC=C1OC(=O)C1=CC=CC=C1 IFIWFBLNBUMQKX-UHFFFAOYSA-N 0.000 description 2
ZFIQGRISGKSVAG-UHFFFAOYSA-N 4-methylaminophenol Chemical compound CNC1=CC=C(O)C=C1 ZFIQGRISGKSVAG-UHFFFAOYSA-N 0.000 description 2
FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
125000002252 acyl group Chemical group 0.000 description 2
230000003569 amebicidal effect Effects 0.000 description 2
150000003931 anilides Chemical class 0.000 description 2
239000002585 base Substances 0.000 description 2
PASDCCFISLVPSO-UHFFFAOYSA-N benzoyl chloride Chemical compound ClC(=O)C1=CC=CC=C1 PASDCCFISLVPSO-UHFFFAOYSA-N 0.000 description 2
238000006480 benzoylation reaction Methods 0.000 description 2
229910052799 carbon Inorganic materials 0.000 description 2
WMJRPJZQQSSDBU-UHFFFAOYSA-L disodium;sulfite;heptahydrate Chemical compound O.O.O.O.O.O.O.[Na+].[Na+].[O-]S([O-])=O WMJRPJZQQSSDBU-UHFFFAOYSA-L 0.000 description 2
FVIZARNDLVOMSU-UHFFFAOYSA-N ginsenoside K Natural products C1CC(C2(CCC3C(C)(C)C(O)CCC3(C)C2CC2O)C)(C)C2C1C(C)(CCC=C(C)C)OC1OC(CO)C(O)C(O)C1O FVIZARNDLVOMSU-UHFFFAOYSA-N 0.000 description 2
229910052739 hydrogen Inorganic materials 0.000 description 2
239000005457 ice water Substances 0.000 description 2
238000004519 manufacturing process Methods 0.000 description 2
239000000463 material Substances 0.000 description 2
QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
229910052753 mercury Inorganic materials 0.000 description 2
229910052751 metal Inorganic materials 0.000 description 2
239000002184 metal Substances 0.000 description 2
BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
235000010755 mineral Nutrition 0.000 description 2
LHMWHZXZMMLYKI-UHFFFAOYSA-N n-(4-hydroxyphenyl)formamide Chemical compound OC1=CC=C(NC=O)C=C1 LHMWHZXZMMLYKI-UHFFFAOYSA-N 0.000 description 2
125000004433 nitrogen atom Chemical group N* 0.000 description 2
QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 description 2
239000003208 petroleum Substances 0.000 description 2
NNFCIKHAZHQZJG-UHFFFAOYSA-N potassium cyanide Chemical compound [K+].N#[C-] NNFCIKHAZHQZJG-UHFFFAOYSA-N 0.000 description 2
239000002244 precipitate Substances 0.000 description 2
125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
239000011541 reaction mixture Substances 0.000 description 2
229910000030 sodium bicarbonate Inorganic materials 0.000 description 2
235000017557 sodium bicarbonate Nutrition 0.000 description 2
229910000029 sodium carbonate Inorganic materials 0.000 description 2
JVBXVOWTABLYPX-UHFFFAOYSA-L sodium dithionite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])=O JVBXVOWTABLYPX-UHFFFAOYSA-L 0.000 description 2
239000007858 starting material Substances 0.000 description 2
KJSVAEGLTPBKAA-UHFFFAOYSA-N 2,2-dichloro-n-phenylacetamide Chemical compound ClC(Cl)C(=O)NC1=CC=CC=C1 KJSVAEGLTPBKAA-UHFFFAOYSA-N 0.000 description 1
HUHXLHLWASNVDB-UHFFFAOYSA-N 2-(oxan-2-yloxy)oxane Chemical compound O1CCCCC1OC1OCCCC1 HUHXLHLWASNVDB-UHFFFAOYSA-N 0.000 description 1
CDAWCLOXVUBKRW-UHFFFAOYSA-N 2-aminophenol Chemical compound NC1=CC=CC=C1O CDAWCLOXVUBKRW-UHFFFAOYSA-N 0.000 description 1
OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
ZVNPWFOVUDMGRP-UHFFFAOYSA-N 4-methylaminophenol sulfate Chemical compound OS(O)(=O)=O.CNC1=CC=C(O)C=C1.CNC1=CC=C(O)C=C1 ZVNPWFOVUDMGRP-UHFFFAOYSA-N 0.000 description 1
208000004881 Amebiasis Diseases 0.000 description 1
VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
206010001980 Amoebiasis Diseases 0.000 description 1
239000005711 Benzoic acid Substances 0.000 description 1
LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
241000208202 Linaceae Species 0.000 description 1
235000004431 Linum usitatissimum Nutrition 0.000 description 1
CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 1
QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
IPBVNPXQWQGGJP-UHFFFAOYSA-N acetic acid phenyl ester Natural products CC(=O)OC1=CC=CC=C1 IPBVNPXQWQGGJP-UHFFFAOYSA-N 0.000 description 1
150000001299 aldehydes Chemical class 0.000 description 1
230000029936 alkylation Effects 0.000 description 1
238000005804 alkylation reaction Methods 0.000 description 1
125000003368 amide group Chemical group 0.000 description 1
125000003277 amino group Chemical group 0.000 description 1
239000000908 ammonium hydroxide Substances 0.000 description 1
235000010233 benzoic acid Nutrition 0.000 description 1
230000015572 biosynthetic process Effects 0.000 description 1
KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 description 1
239000007795 chemical reaction product Substances 0.000 description 1
239000003795 chemical substances by application Substances 0.000 description 1
RNFNDJAIBTYOQL-UHFFFAOYSA-N chloral hydrate Chemical compound OC(O)C(Cl)(Cl)Cl RNFNDJAIBTYOQL-UHFFFAOYSA-N 0.000 description 1
229960002327 chloral hydrate Drugs 0.000 description 1
229940126214 compound 3 Drugs 0.000 description 1
IQFVPQOLBLOTPF-HKXUKFGYSA-L congo red Chemical compound [Na+].[Na+].C1=CC=CC2=C(N)C(/N=N/C3=CC=C(C=C3)C3=CC=C(C=C3)/N=N/C3=C(C4=CC=CC=C4C(=C3)S([O-])(=O)=O)N)=CC(S([O-])(=O)=O)=C21 IQFVPQOLBLOTPF-HKXUKFGYSA-L 0.000 description 1
239000013058 crude material Substances 0.000 description 1
239000013078 crystal Substances 0.000 description 1
239000002178 crystalline material Substances 0.000 description 1
238000010908 decantation Methods 0.000 description 1
230000000994 depressogenic effect Effects 0.000 description 1
238000001035 drying Methods 0.000 description 1
230000032050 esterification Effects 0.000 description 1
238000005886 esterification reaction Methods 0.000 description 1
239000012467 final product Substances 0.000 description 1
235000019253 formic acid Nutrition 0.000 description 1
XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
NBTOZLQBSIZIKS-UHFFFAOYSA-N methoxide Chemical compound [O-]C NBTOZLQBSIZIKS-UHFFFAOYSA-N 0.000 description 1
VUQUOGPMUUJORT-UHFFFAOYSA-N methyl 4-methylbenzenesulfonate Chemical compound COS(=O)(=O)C1=CC=C(C)C=C1 VUQUOGPMUUJORT-UHFFFAOYSA-N 0.000 description 1
229940095102 methyl benzoate Drugs 0.000 description 1
230000001035 methylating effect Effects 0.000 description 1
238000002156 mixing Methods 0.000 description 1
125000004430 oxygen atom Chemical group O* 0.000 description 1
WLJVXDMOQOGPHL-UHFFFAOYSA-N phenylacetic acid Chemical compound OC(=O)CC1=CC=CC=C1 WLJVXDMOQOGPHL-UHFFFAOYSA-N 0.000 description 1
125000006239 protecting group Chemical group 0.000 description 1
238000005956 quaternization reaction Methods 0.000 description 1
239000002516 radical scavenger Substances 0.000 description 1
150000003839 salts Chemical group 0.000 description 1
239000012047 saturated solution Substances 0.000 description 1
239000011780 sodium chloride Substances 0.000 description 1
239000000725 suspension Substances 0.000 description 1
238000005406 washing Methods 0.000 description 1
239000003643 water by type Substances 0.000 description 1