NO166363B - PROCEDURE FOR THE PREPARATION OF DIAMINO AND DIALKYLAMINO BENENZENIOLS. - Google Patents
PROCEDURE FOR THE PREPARATION OF DIAMINO AND DIALKYLAMINO BENENZENIOLS. Download PDFInfo
- Publication number
- NO166363B NO166363B NO880142A NO880142A NO166363B NO 166363 B NO166363 B NO 166363B NO 880142 A NO880142 A NO 880142A NO 880142 A NO880142 A NO 880142A NO 166363 B NO166363 B NO 166363B
- Authority
- NO
- Norway
- Prior art keywords
- benzoquinone
- diamino
- benzenediol
- starting material
- dichloro
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 31
- 238000002360 preparation method Methods 0.000 title description 5
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 claims description 19
- 239000007858 starting material Substances 0.000 claims description 16
- 239000003054 catalyst Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- QLHPOTDBWHTTBM-UHFFFAOYSA-N 2,5-diamino-3,6-dichlorocyclohexa-2,5-diene-1,4-dione Chemical compound NC1=C(Cl)C(=O)C(N)=C(Cl)C1=O QLHPOTDBWHTTBM-UHFFFAOYSA-N 0.000 claims description 5
- 229910000510 noble metal Inorganic materials 0.000 claims description 5
- ALNMGJGNJWZQCT-UHFFFAOYSA-N 2,5-bis(benzylamino)-3,6-dichlorocyclohexa-2,5-diene-1,4-dione Chemical compound O=C1C(Cl)=C(NCC=2C=CC=CC=2)C(=O)C(Cl)=C1NCC1=CC=CC=C1 ALNMGJGNJWZQCT-UHFFFAOYSA-N 0.000 claims description 3
- 239000003610 charcoal Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 229910052763 palladium Inorganic materials 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 8
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 8
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 229920002577 polybenzoxazole Polymers 0.000 description 6
- RLXBOUUYEFOFSW-UHFFFAOYSA-N 2,5-diaminobenzene-1,4-diol Chemical compound NC1=CC(O)=C(N)C=C1O RLXBOUUYEFOFSW-UHFFFAOYSA-N 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 4
- 125000003277 amino group Chemical group 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910000039 hydrogen halide Inorganic materials 0.000 description 4
- 239000012433 hydrogen halide Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 150000005205 dihydroxybenzenes Chemical class 0.000 description 3
- 230000008030 elimination Effects 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 150000002367 halogens Chemical group 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 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 2
- 150000004057 1,4-benzoquinones Chemical class 0.000 description 2
- OPEBRXDDRJAWDE-UHFFFAOYSA-N 2,5-bis(benzylamino)benzene-1,4-diol Chemical compound OC=1C=C(NCC=2C=CC=CC=2)C(O)=CC=1NCC1=CC=CC=C1 OPEBRXDDRJAWDE-UHFFFAOYSA-N 0.000 description 2
- MRKVFMSJPJAXGZ-UHFFFAOYSA-N 2,5-bis(methylamino)benzene-1,4-diol Chemical compound CNC1=CC(O)=C(NC)C=C1O MRKVFMSJPJAXGZ-UHFFFAOYSA-N 0.000 description 2
- TVXPWFFFDLVOID-UHFFFAOYSA-N 2,5-dichloro-3,6-bis(ethylamino)cyclohexa-2,5-diene-1,4-dione Chemical compound CCNC1=C(Cl)C(=O)C(NCC)=C(Cl)C1=O TVXPWFFFDLVOID-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- RMMPZDDLWLALLJ-UHFFFAOYSA-N Thermophillin Chemical compound COC1=CC(=O)C(OC)=CC1=O RMMPZDDLWLALLJ-UHFFFAOYSA-N 0.000 description 2
- 229910021626 Tin(II) chloride Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Chemical group BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 150000005690 diesters Chemical class 0.000 description 2
- 150000002009 diols Chemical class 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 150000004820 halides Chemical class 0.000 description 2
- 125000005843 halogen group Chemical group 0.000 description 2
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 2
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 229960004337 hydroquinone Drugs 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010525 oxidative degradation reaction Methods 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000001119 stannous chloride Substances 0.000 description 2
- 235000011150 stannous chloride Nutrition 0.000 description 2
- 229940005561 1,4-benzoquinone Drugs 0.000 description 1
- SDHNWIUQNFNBAI-UHFFFAOYSA-N 2,3-diaminocyclohexa-2,5-diene-1,4-dione Chemical compound NC1=C(N)C(=O)C=CC1=O SDHNWIUQNFNBAI-UHFFFAOYSA-N 0.000 description 1
- HQJLEFDAYKUXSA-UHFFFAOYSA-N 2,3-dihydroxycyclohexa-2,5-diene-1,4-dione Chemical compound OC1=C(O)C(=O)C=CC1=O HQJLEFDAYKUXSA-UHFFFAOYSA-N 0.000 description 1
- LTPALHSSZDKRLE-UHFFFAOYSA-N 2,5-bis(ethylamino)benzene-1,4-diol Chemical compound CCNC1=CC(O)=C(NCC)C=C1O LTPALHSSZDKRLE-UHFFFAOYSA-N 0.000 description 1
- GSXKJBAJKNLWOW-UHFFFAOYSA-N 2,5-bis(methylamino)benzene-1,4-diol;dihydrochloride Chemical compound Cl.Cl.CNC1=CC(O)=C(NC)C=C1O GSXKJBAJKNLWOW-UHFFFAOYSA-N 0.000 description 1
- NVCGMHKXXQRFFQ-UHFFFAOYSA-N 2,5-diamino-3,6-dibromocyclohexa-2,5-diene-1,4-dione Chemical compound NC1=C(Br)C(=O)C(N)=C(Br)C1=O NVCGMHKXXQRFFQ-UHFFFAOYSA-N 0.000 description 1
- NILKAWPWTYPHAH-UHFFFAOYSA-N 2,5-diaminobenzene-1,4-diol;dihydrochloride Chemical compound Cl.Cl.NC1=CC(O)=C(N)C=C1O NILKAWPWTYPHAH-UHFFFAOYSA-N 0.000 description 1
- VUVVIURXJWHENR-UHFFFAOYSA-N 2,5-diaminocyclohexa-2,5-diene-1,4-dione Chemical compound NC1=CC(=O)C(N)=CC1=O VUVVIURXJWHENR-UHFFFAOYSA-N 0.000 description 1
- FFDJPKFQNPMIAE-UHFFFAOYSA-N 2,5-dichloro-3,6-bis(methylamino)cyclohexa-2,5-diene-1,4-dione Chemical compound CNC1=C(Cl)C(=O)C(NC)=C(Cl)C1=O FFDJPKFQNPMIAE-UHFFFAOYSA-N 0.000 description 1
- QFSYADJLNBHAKO-UHFFFAOYSA-N 2,5-dihydroxy-1,4-benzoquinone Chemical compound OC1=CC(=O)C(O)=CC1=O QFSYADJLNBHAKO-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical group [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical group FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Chemical group 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052740 iodine Chemical group 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000007040 multi-step synthesis reaction Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- SYQBFIAQOQZEGI-UHFFFAOYSA-N osmium atom Chemical compound [Os] SYQBFIAQOQZEGI-UHFFFAOYSA-N 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Description
Denne oppfinnelse angår fremstilling av diamino- og This invention relates to the production of diamino- and
dialkylaminobenzendioler. dialkylaminobenzenediols.
Diamino- og dialkylaminobenzendioler er nyttige som monomerer ved fremstilling av polybenzoksazoler (PBO). Poly-benzpksazoler kan fremstilles ved omsetning av visse benzendioler med disyrer, disyrehalogenider, diestere eller dinitriler. Polybenzoksazolfibre har høy strekkstyrke og varmestabilitet og er gunstige for luft- og romfart-anvendelser og andre anvendelser som krever stive materialer. Diamino and dialkylaminobenzene diols are useful as monomers in the preparation of polybenzoxazoles (PBO). Polybenzpxazoles can be prepared by reacting certain benzenediols with diacids, diacid halides, diesters or dinitriles. Polybenzoxazole fibers have high tensile strength and heat stability and are beneficial for aerospace and other applications that require rigid materials.
De kjente metoder for fremstilling av benzendiol-monomerene omfatter typisk en flertrinns syntese hvor kostbare reagenser er nødvendige og det totale utbytte er dårlig. For eksempel omfatter en fremgangsmåte oksydativ bihydroksylering av hydrokinon med hydrogenperoksyd og et alkali for å danne 2,5-dihydroksy-p-benzokinon. Omsetningen av hydrogenklorid og metanol med dihydroksybenzokinon gir 2,5-dimetoksy-p-benzokinon som amineres med ammoniakk og derefter reduseres med tinn(II)-klorid i konsentrert saltsyre for å danne 2,5-diamino-l,4-benzendiol med et totalt utbytte på bare ca. 20 %. Se R. Wolf, The known methods for producing the benzenediol monomers typically comprise a multi-step synthesis where expensive reagents are necessary and the overall yield is poor. For example, one method involves the oxidative bihydroxylation of hydroquinone with hydrogen peroxide and an alkali to form 2,5-dihydroxy-p-benzoquinone. The reaction of hydrogen chloride and methanol with dihydroxybenzoquinone gives 2,5-dimethoxy-p-benzoquinone which is aminated with ammonia and then reduced with stannous chloride in concentrated hydrochloric acid to form 2,5-diamino-1,4-benzenediol with a total dividend of only approx. 20%. See R. Wolf,
M. Okada og C. S. Marvel, J. Polymer Science, Part A, 6, 1503 M. Okada and C.S. Marvel, J. Polymer Science, Part A, 6, 1503
(1968). (1968).
En direkte reduksjon av 2,5-diamino-l,4-benzokinon med tinn(II)klorid og HC1 for å fremstille 2,5-diamino-l,4-benzendiol er beskrevet i Beilstein's Handbuch der Organischen Chemie, 4, utg., Hoveddel, Bind 13, s. 791. Denne fremgangsmåte er beheftet med den ulempe at diaminobenzokinon-utgangsmateriale ikke er lett kommersielt tilgjengelig men må fremstilles fra det billigere hydrokinon ved den ovenfor nevnte flertrinns-prosess. Andre metoder omfatter reduksjon av et dihalogen-diaminobenzokinon til det tilsvarende dihalogendiaminohydrokinon uten eliminering av halogen-substituentene. Se for eksempel US-patent 4 337 196; britisk patent 1 130 275 og fransk patent 1 544 504. A direct reduction of 2,5-diamino-1,4-benzoquinone with stannous chloride and HCl to prepare 2,5-diamino-1,4-benzenediol is described in Beilstein's Handbuch der Organischen Chemie, 4, ed. , Main part, Volume 13, p. 791. This method suffers from the disadvantage that diaminobenzoquinone starting material is not readily commercially available but must be prepared from the cheaper hydroquinone by the above-mentioned multi-step process. Other methods include the reduction of a dihalodiaminobenzoquinone to the corresponding dihalodiaminohydroquinone without elimination of the halogen substituents. See, for example, US Patent 4,337,196; British patent 1,130,275 and French patent 1,544,504.
Det er behov for en enkel, økonomisk prosess som gir et høyt utbytte og tillater både reduksjon av benzokinonet og eliminering av halogensubstituentene. En slik fremgangsmåte ville tillate effektiv fremstilling av diamino- og dialkylamino-benzendiol-monomerer for anvendelse ved fremstilling av de meget ønskelige polybenzoksazoler. There is a need for a simple, economical process which gives a high yield and allows both the reduction of the benzoquinone and the elimination of the halogen substituents. Such a process would permit the efficient preparation of diamino and dialkylaminobenzenediol monomers for use in the preparation of the highly desirable polybenzoxazoles.
Foreliggende oppfinnelse tilveiebringer en slik direkte og billig entrinns fremgangsmåte som fører til et høyt utbytte av diamino- og dialkylaminobenzendioler. Denne fremgangsmåte omfatter omsetning, under egnede reaksjonsbetingelser, av et lett tilgjengelig diaminodihalogen- eller dialkylaminodihalogenbenzokinon med et hydrogeneringsmiddel i nærvær av vann og et edelmetall på en bærer av kull. Det er overraskende funnet at anvendelse av et edelmetall på kull som katalysator ved foreliggende fremgangsmåte, resulterer i et høyt utbytte og fører til reduksjon av benzokinonet og eliminering av halogen-substituentene. The present invention provides such a direct and inexpensive one-step process which leads to a high yield of diamino- and dialkylaminobenzenediols. This process comprises the reaction, under suitable reaction conditions, of a readily available diaminodihalogen or dialkylaminodihalogenbenzoquinone with a hydrogenating agent in the presence of water and a noble metal on a charcoal support. It has surprisingly been found that the use of a noble metal on coal as a catalyst in the present process results in a high yield and leads to the reduction of the benzoquinone and the elimination of the halogen substituents.
De således fremstilte diamino- og dialkylaminobenzendioler kan kondenseres med disyrer, disyrehalogenider, diestere eller dinitriler for fremstilling av polybenzoksazoler. Polybenzoksazolfibre har høy strekkstyrke og varmestabilitet og har således et stort potensial for forskjellige industrielle anvendelser. The diamino and dialkylaminobenzene diols thus produced can be condensed with diacids, diacid halides, diesters or dinitriles to produce polybenzoxazoles. Polybenzoxazole fibers have high tensile strength and heat stability and thus have great potential for various industrial applications.
I henhold til foreliggende fremgangsmåte bringes benzokinon-utgangsmaterialet i kontakt med et hydrogeneringsmiddel i nærvær av vann og et edelmetall på en bærer av kull. De foretrukne benzokinon-forbindelser som anvendes som utgangsmateriale ved foreliggende fremgangsmåte, svarer til den følgende generelle formel: According to the present process, the benzoquinone starting material is brought into contact with a hydrogenating agent in the presence of water and a noble metal on a support of charcoal. The preferred benzoquinone compounds used as starting material in the present process correspond to the following general formula:
hvor: B er 1,4-benzokinon; hver X er uavhengig av hverandre et klor-, brom-, fluor- eller jod-atom, særlig klor; og R-^ og R2 er uavhengig av hverandre hydrogen, Cj^g-alkyl eller benzyl, særlig hydrogen. where: B is 1,4-benzoquinone; each X is independently a chlorine, bromine, fluorine or iodine atom, especially chlorine; and R 1 and R 2 are independently hydrogen, C 1-6 alkyl or benzyl, especially hydrogen.
Typiske benzokinonforbindelser med formel (I) omfatter for eksempel 2,5-diklor-3,6-diamino-l,4-benzokinon, 2,5-dibrom-3,6-diamino-1,4-benzokinon, 2,5-diklor-3,6-dibenzylamino-l,4-benzokinon, 2,5-diklor-3,6-dietylamino-l,4-benzokinon; 2,5-diklor-3,6-dietylamino-l,4-benzokinon; fortrinnsvis 2,5-diklor-3,6-diamino-1,4-benzokinon, og 2,5-diklor-3,6-dibenzylamino-l,4-benzokinon. Det mest foretrukne benzokinon-utgangsmateriale er 2,5-diklor-3,6-diamino-l,4-benzokinon. Typical benzoquinone compounds of formula (I) include, for example, 2,5-dichloro-3,6-diamino-1,4-benzoquinone, 2,5-dibromo-3,6-diamino-1,4-benzoquinone, 2,5- dichloro-3,6-dibenzylamino-1,4-benzoquinone, 2,5-dichloro-3,6-diethylamino-1,4-benzoquinone; 2,5-dichloro-3,6-diethylamino-1,4-benzoquinone; preferably 2,5-dichloro-3,6-diamino-1,4-benzoquinone, and 2,5-dichloro-3,6-dibenzylamino-1,4-benzoquinone. The most preferred benzoquinone starting material is 2,5-dichloro-3,6-diamino-1,4-benzoquinone.
Benzokinon-utgangsmaterialene med formel (I) kan fremstilles ved i og for seg kjente metoder. Den typiske fremstilling omfatter vanligvis omsetning av overskudd av ammoniakk eller ammoniumhydroksyd med tetrahalogenkinon. Se for eksempel US-patent 4 337 196. The benzoquinone starting materials of formula (I) can be prepared by methods known per se. The typical preparation usually involves reaction of excess ammonia or ammonium hydroxide with tetrahaloquinone. See, for example, US Patent 4,337,196.
Hydrogeneringskatalysatoren som anvendes ved utførelse av foreliggende fremgangsmåte, er et edelmetall på en bærer av kull. Med edelmetall skal her forstås gull, sølv, platina, palladium, iridium, rhodium, kvikksølv, ruthenium og osmium. Foretrukne katalysatorer omfatter palladium på kull og platina på kull. Den mest foretrukne hydrogeneringskatalysator er palladium på kull. Katalysatoren anvendes i en mengde som er tilstrekkelig til å katalysere omdannelsen av utgangsmaterialet i nærvær av et hydrogeneringsmiddel til den tilsvarende benzendiol. Typisk er fra 0,0005 til 0,1 molekvivalenter av katalysator til stede pr. ekvivalent av benzokinon-utgangsmateriale. Fortrinnsvis er fra 0,02 til 0,05 ekvivalenter av katalysator til stede under reaksjonen. The hydrogenation catalyst used in carrying out the present method is a noble metal on a carrier of coal. Precious metal here is understood to mean gold, silver, platinum, palladium, iridium, rhodium, mercury, ruthenium and osmium. Preferred catalysts include palladium on carbon and platinum on carbon. The most preferred hydrogenation catalyst is palladium on charcoal. The catalyst is used in an amount sufficient to catalyze the conversion of the starting material in the presence of a hydrogenating agent to the corresponding benzenediol. Typically from 0.0005 to 0.1 mole equivalents of catalyst are present per equivalent of benzoquinone starting material. Preferably, from 0.02 to 0.05 equivalents of catalyst are present during the reaction.
Vann anvendes som oppløsningsmiddel ved foreliggende fremgangsmåte. Fortrinnsvis anvendes fra 1 til 50 volumdeler vann pr. volumdel benzokinon-utgangsmateriale med formel (I). Mer foretrukket anvendes fra 5 til 10 volumdeler vann. Water is used as solvent in the present method. Preferably, from 1 to 50 parts by volume of water are used per volume part benzoquinone starting material of formula (I). More preferably, from 5 to 10 parts by volume of water are used.
Hydrogeneringsmidler er velkjente. Hydrogeneringsmidlet som anvendes ved fremgangsmåten ifølge oppfinnelsen, kan være et hvilket som helst materiale som vil tilføre hydrogen til reaksjonen. Ved foreliggende fremgangsmåte foretrekkes hydrogengass eller hydrazin. Hydrogeneringsmidlet anvendes i en mengde som er tilstrekkelig til å hydrogenere benzokinon-utgangsmaterialet med formel (I). Når hydrogen anvendes er molforholdet mellom hydrogengass og benzokinon-utgangsmateriale mellom 3:1 og 30:1; fortrinnsvis ca. 5:1. Typisk anvendes fra 4 til 8 molekvivalenter hydrazin pr. ekvivalent av benzokinon-utgangsmateriale. Fortrinnsvis anvendes fra 3 til 6 molekvivalenter hydrazin. Hydrogenating agents are well known. The hydrogenating agent used in the method according to the invention can be any material which will add hydrogen to the reaction. In the present method, hydrogen gas or hydrazine is preferred. The hydrogenating agent is used in an amount sufficient to hydrogenate the benzoquinone starting material of formula (I). When hydrogen is used, the molar ratio between hydrogen gas and benzoquinone starting material is between 3:1 and 30:1; preferably approx. 5:1. Typically from 4 to 8 molar equivalents of hydrazine are used per equivalent of benzoquinone starting material. Preferably from 3 to 6 molar equivalents of hydrazine are used.
Foreliggende fremgangsmåte utføres under egnede reaksjonsbetingelser slik at den tilsvarende benzendiol dannes. Slike egnede betingelser er beskrevet nedenfor. The present method is carried out under suitable reaction conditions so that the corresponding benzenediol is formed. Such suitable conditions are described below.
Foreliggende fremgangsmåte kan utføres ved enhver temperatur og ethvert trykk som reaksjonen finner sted ved. Fortrinnsvis utføres fremgangsmåten mellom 20 og 100°C, særlig mellom 20 og 50°C. Fremgangsmåten kan utføres ved under- eller overatmos-færisk trykk, idet atmosfærisk trykk foretrekkes av praktiske grunner. En total reaksjonstid fra 4 til 72 timer er vanligvis tilstrekkelig til å omdanne utgangsmaterialet med formel (I) The present method can be carried out at any temperature and any pressure at which the reaction takes place. The method is preferably carried out between 20 and 100°C, in particular between 20 and 50°C. The method can be carried out at below or above atmospheric pressure, with atmospheric pressure being preferred for practical reasons. A total reaction time of 4 to 72 hours is usually sufficient to convert the starting material of formula (I)
til den tilsvarende benzendiol. to the corresponding benzenediol.
Ved fremgangsmåten ifølge oppfinnelsen fjernes overraskende halogenatomene fra benzokinon-ringsystemet, og benzokinonet omdannes til den tilsvarende benzendiol. Eftersom halogenatomene fjernes, antas det at et hydrogenhalogenid dannes. In the method according to the invention, the halogen atoms are surprisingly removed from the benzoquinone ring system, and the benzoquinone is converted into the corresponding benzenediol. Since the halogen atoms are removed, it is assumed that a hydrogen halide is formed.
Selv om man her ikke skal begrense seg til noen teori, antas at et spesielt trekk ved foreliggende oppfinnelse er amino-gruppenes evne til å oppfange hydrogenhalogenidet eftersom det dannes og derved hindre syreforgiftning av katalysatoren. Til-stedeværelsen av aminogruppene eliminerer tilsynelatende behovet for tilsetning av ytterligere base mens reaksjonen finner sted og medfører således en ytterligere økonomisk fordel. Videre vil det hydrogenhalogenid som således er oppfanget av aminogruppene, tilsynelatende hjelpe til med å stabilisere benzendiolen slik at man unngår oksydativ nedbrytning av produktet. Både ved å hindre katalysatorforgiftning og effektivt stabilisere sluttproduktet synes aminogruppene å Although one should not limit oneself here to any theory, it is assumed that a special feature of the present invention is the ability of the amino groups to capture the hydrogen halide as it is formed and thereby prevent acid poisoning of the catalyst. The presence of the amino groups apparently eliminates the need for the addition of additional base while the reaction is taking place and thus provides a further economic advantage. Furthermore, the hydrogen halide thus captured by the amino groups will apparently help to stabilize the benzenediol so that oxidative degradation of the product is avoided. Both by preventing catalyst poisoning and effectively stabilizing the end product, the amino groups seem to
bidra til at det dannes overraskende høye utbytter. contribute to the formation of surprisingly high dividends.
Benzendiol-forbindelsene fremstilt ved fremgangsmåten ifølge oppfinnelsen har den følgende generelle formel: The benzenediol compounds produced by the method according to the invention have the following general formula:
hvor: R^ og R2 er som definert i formel (I). where: R 1 and R 2 are as defined in formula (I).
Typiske benzendioler omfatter for eksempel 2,5-diamino-1,4-benzendiol, 2,5-dibenzylamino-l,4-benzendiol, 2,5-dimetyl-amino-1,4-benzendiol, 2,5-dietylamino-l,4-benzendiol; fortrinnsvis 2,5-diamino-l,4-benzendiol, 2,5-dimetylamino-l,4-benzendiol eller 2,5-dibenzylamino-l,4-benzendiol. Den mest foretrukne benzendiol er 2,5-diamino-l,4-benzendiol. Typical benzenediols include, for example, 2,5-diamino-1,4-benzenediol, 2,5-dibenzylamino-1,4-benzenediol, 2,5-dimethylamino-1,4-benzenediol, 2,5-diethylamino-1 ,4-benzenediol; preferably 2,5-diamino-1,4-benzenediol, 2,5-dimethylamino-1,4-benzenediol or 2,5-dibenzylamino-1,4-benzenediol. The most preferred benzenediol is 2,5-diamino-1,4-benzenediol.
Produktet med formel (II) kan utvinnes under anvendelse av kjente gjenvinningsmetoder som for eksempel filtrering eller vasking. Vanligvis isoleres og lagres produktet som et hydrogenhalogenidsalt for å hindre oksydativ nedbrytning. Det er også en passende vanlig praksis å isolere produktet som et salt av en hvilken som helst mineralsyre såsom svovelsyre, salpetersyre eller fosforsyre. Typiske utbytter av benzendiolen med formel (II) er minst 50 til 90 % basert på benzokinon-utgangsmaterialet med formel (I). Fortrinnsvis vil utbyttet være minst ca. 70 %. De maksimale utbytter oppnås vanligvis når hydrogengass anvendes direkte. The product with formula (II) can be recovered using known recovery methods such as, for example, filtration or washing. Usually the product is isolated and stored as a hydrogen halide salt to prevent oxidative degradation. It is also a convenient common practice to isolate the product as a salt of any mineral acid such as sulfuric, nitric or phosphoric acid. Typical yields of the benzenediol of formula (II) are at least 50 to 90% based on the benzoquinone starting material of formula (I). Preferably, the yield will be at least approx. 70%. The maximum yields are usually obtained when hydrogen gas is used directly.
De følgende eksempler skal illustrere oppfinnelsen ytterligere. The following examples shall further illustrate the invention.
Eksempel 1 Example 1
Til et reaksjonskar ble satt 24,6 g 2,5-diklor-3,6-diamino-1,4-benzokinon, 1,6 g 10 vekt% palladium på kull og 300 ml vann. Blandingen ble kraftig omrørt, og hydrogengass ble samtidig ført gjennom blandingen i 48 timer ved omgivelses-temperatur. Blandingen ble derefter filtrert og vasket med 50 ml vann. Derefter ble 150 ml konsentrert saltsyre satt til filtratet under avkjøling. Efter 30 minutter ble de hvite krystaller filtrert, vasket med små mengder etanol og eter og sugetørket. Utbyttet av 2,5-diamino-l,4-benzendiol-bishydro-klorid var 87,3 mol% (22,10 g) basert på benzokinon-utgangsmaterialet. 24.6 g of 2,5-dichloro-3,6-diamino-1,4-benzoquinone, 1.6 g of 10% by weight palladium on charcoal and 300 ml of water were added to a reaction vessel. The mixture was vigorously stirred, and hydrogen gas was simultaneously passed through the mixture for 48 hours at ambient temperature. The mixture was then filtered and washed with 50 ml of water. Then 150 ml of concentrated hydrochloric acid was added to the filtrate while cooling. After 30 minutes, the white crystals were filtered, washed with small amounts of ethanol and ether and dried with suction. The yield of 2,5-diamino-1,4-benzenediol bishydrochloride was 87.3 mol% (22.10 g) based on the benzoquinone starting material.
Eksempel 2 Example 2
Til et reaksjonskar ble satt 23,5 g 2,5-diklor-3,6-dimetylamino-1,4-benzokinon, 2,0 g 10 vekt% palladium på kull og 400 ml vann. Blandingen ble kraftig omrørt, og hydrogengass ble samtidig ført gjennom blandingen i 72 timer ved omgivelses-temperatur. Blandingen ble derefter filtrert og vasket med 50 ml vann. Derefter ble 200 ml konsentrert saltsyre satt til filtratet under avkjøling. Efter 30 minutter ble de hvite krystaller filtrert, vasket med små mengder etanol og eter og sugetørket. Utbyttet av 2,5-dimetylamino-l,4-benzendiol-bishydroklorid er 85,0 mol% (20,31 g) basert på benzokinon-utgangsmaterialet. 23.5 g of 2,5-dichloro-3,6-dimethylamino-1,4-benzoquinone, 2.0 g of 10% by weight palladium on charcoal and 400 ml of water were added to a reaction vessel. The mixture was vigorously stirred, and hydrogen gas was simultaneously passed through the mixture for 72 hours at ambient temperature. The mixture was then filtered and washed with 50 ml of water. Then 200 ml of concentrated hydrochloric acid was added to the filtrate while cooling. After 30 minutes, the white crystals were filtered, washed with small amounts of ethanol and ether and dried with suction. The yield of 2,5-dimethylamino-1,4-benzenediol bishydrochloride is 85.0 mol% (20.31 g) based on the benzoquinone starting material.
Eksemplene viser at fremgangsmåten ifølge oppfinnelsen representerer en enkel og effektiv metode som kan føre til dannelse av overraskende høye utbytter av diamino- og dialkylaminobenzendioler. The examples show that the method according to the invention represents a simple and effective method which can lead to the formation of surprisingly high yields of diamino and dialkylaminobenzenediols.
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/864,063 US4806688A (en) | 1986-05-16 | 1986-05-16 | Preparation of diamino- and dialkylaminobenzenediols |
PCT/US1987/001098 WO1987006930A1 (en) | 1986-05-16 | 1987-05-12 | Preparation of diamino- and dialkylaminobenzenediols |
Publications (4)
Publication Number | Publication Date |
---|---|
NO880142D0 NO880142D0 (en) | 1988-01-14 |
NO880142L NO880142L (en) | 1988-01-14 |
NO166363B true NO166363B (en) | 1991-04-02 |
NO166363C NO166363C (en) | 1991-07-10 |
Family
ID=26775805
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO880142A NO166363C (en) | 1986-05-16 | 1988-01-14 | PROCEDURE FOR THE PREPARATION OF DIAMINO AND DIALKYLAMINO BENENZENIOLS. |
Country Status (1)
Country | Link |
---|---|
NO (1) | NO166363C (en) |
-
1988
- 1988-01-14 NO NO880142A patent/NO166363C/en unknown
Also Published As
Publication number | Publication date |
---|---|
NO880142D0 (en) | 1988-01-14 |
NO166363C (en) | 1991-07-10 |
NO880142L (en) | 1988-01-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4766244A (en) | High purity process for the preparation of 4,6-diamino-1,3-benzenediol | |
US4482738A (en) | Process for preparing semicarbazide hydrochloride | |
CA1318916C (en) | Process for the preparation of amino-1,3-benzenediol | |
KR910002539B1 (en) | Preparation of diamino and dialkylamino benzenediols | |
US4885389A (en) | Process for manufacturing p-aminophenol | |
JPH0446264B2 (en) | ||
NO166363B (en) | PROCEDURE FOR THE PREPARATION OF DIAMINO AND DIALKYLAMINO BENENZENIOLS. | |
DK170331B1 (en) | Process for the preparation of rimantadine | |
KR910004358B1 (en) | Process for the preparation of bis (amine-containing) benzenediols | |
KR0167079B1 (en) | Aqueous synthesis of 2-halo-4, 6-dinitroresorcinol and 4,6-diaminoresorcinol | |
JPH0414096B2 (en) | ||
JPH04149160A (en) | Production of 1-amino-4-alkoxybenzene compounds | |
US20100160675A1 (en) | Integrated process for the preparation of polybenzimidazole precursors | |
USRE34745E (en) | High purity process for the preparation of 4,6-diamino-1,3-benzenediol | |
JPH02255639A (en) | Production of 4,4'-(1,6-hexamethylenedioxy)-bis-benzoic acid | |
JPH1087560A (en) | Complex, production thereof, and production of p-hydroxybenzoic acid | |
JPH07278120A (en) | Production of 5-formylaminopyrimidine | |
WO1995017374A1 (en) | A process for the preparation of diaminoresorcinol | |
JPS61109759A (en) | Production of 4-alkoxyaniline | |
JPH0753697B2 (en) | Purification method of m-aminophenol | |
JPH0772180B2 (en) | Method for producing 5-benzylhydantoin | |
JPS625898B2 (en) |