SE457170B - Foerfarande foer framstaellning av 2-oxo-dihydrobenso / d / / 1,3 / -oxaziner - Google Patents
Foerfarande foer framstaellning av 2-oxo-dihydrobenso / d / / 1,3 / -oxazinerInfo
- Publication number
- SE457170B SE457170B SE8006761A SE8006761A SE457170B SE 457170 B SE457170 B SE 457170B SE 8006761 A SE8006761 A SE 8006761A SE 8006761 A SE8006761 A SE 8006761A SE 457170 B SE457170 B SE 457170B
- Authority
- SE
- Sweden
- Prior art keywords
- process according
- hypochlorite
- hypobromite
- general formula
- amount
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 21
- 238000002360 preparation method Methods 0.000 title claims description 13
- WQYVRQLZKVEZGA-UHFFFAOYSA-N hypochlorite Chemical compound Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 claims description 45
- JGJLWPGRMCADHB-UHFFFAOYSA-N hypobromite Chemical compound Br[O-] JGJLWPGRMCADHB-UHFFFAOYSA-N 0.000 claims description 30
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 18
- 239000000243 solution Substances 0.000 claims description 16
- 239000003444 phase transfer catalyst Substances 0.000 claims description 14
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 13
- 239000011541 reaction mixture Substances 0.000 claims description 12
- 239000007864 aqueous solution Substances 0.000 claims description 11
- 150000008044 alkali metal hydroxides Chemical class 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 9
- 150000001875 compounds Chemical class 0.000 claims description 8
- 229940090181 propyl acetate Drugs 0.000 claims description 8
- SYZIUAAQNFJPJY-UHFFFAOYSA-N 1,4-dihydro-3,1-benzoxazin-2-one Chemical class C1=CC=C2COC(=O)NC2=C1 SYZIUAAQNFJPJY-UHFFFAOYSA-N 0.000 claims description 7
- 125000000217 alkyl group Chemical group 0.000 claims description 6
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 239000012670 alkaline solution Substances 0.000 claims description 4
- 125000003545 alkoxy group Chemical group 0.000 claims description 4
- 125000005843 halogen group Chemical group 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 3
- 125000003118 aryl group Chemical group 0.000 claims description 3
- 125000004432 carbon atom Chemical group C* 0.000 claims description 3
- YKYONYBAUNKHLG-UHFFFAOYSA-N n-Propyl acetate Natural products CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 claims description 3
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 3
- NQPDZGIKBAWPEJ-UHFFFAOYSA-N valeric acid Chemical compound CCCCC(O)=O NQPDZGIKBAWPEJ-UHFFFAOYSA-N 0.000 claims description 3
- 125000004442 acylamino group Chemical group 0.000 claims description 2
- 125000004423 acyloxy group Chemical group 0.000 claims description 2
- 150000001733 carboxylic acid esters Chemical class 0.000 claims description 2
- 150000008280 chlorinated hydrocarbons Chemical class 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 239000000725 suspension Substances 0.000 claims description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims 1
- UUEVFMOUBSLVJW-UHFFFAOYSA-N oxo-[[1-[2-[2-[2-[4-(oxoazaniumylmethylidene)pyridin-1-yl]ethoxy]ethoxy]ethyl]pyridin-4-ylidene]methyl]azanium;dibromide Chemical compound [Br-].[Br-].C1=CC(=C[NH+]=O)C=CN1CCOCCOCCN1C=CC(=C[NH+]=O)C=C1 UUEVFMOUBSLVJW-UHFFFAOYSA-N 0.000 claims 1
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 27
- 239000000047 product Substances 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 9
- 239000002585 base Substances 0.000 description 9
- -1 benzyl aldehydes Chemical class 0.000 description 9
- 239000000460 chlorine Substances 0.000 description 9
- 229910052801 chlorine Inorganic materials 0.000 description 9
- XKBGEWXEAPTVCK-UHFFFAOYSA-M methyltrioctylammonium chloride Chemical compound [Cl-].CCCCCCCC[N+](C)(CCCCCCCC)CCCCCCCC XKBGEWXEAPTVCK-UHFFFAOYSA-M 0.000 description 9
- 239000002609 medium Substances 0.000 description 7
- 239000012071 phase Substances 0.000 description 7
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 7
- 239000007858 starting material Substances 0.000 description 7
- KGWNRZLPXLBMPS-UHFFFAOYSA-N 2h-1,3-oxazine Chemical class C1OC=CC=N1 KGWNRZLPXLBMPS-UHFFFAOYSA-N 0.000 description 6
- HTZCNXWZYVXIMZ-UHFFFAOYSA-M benzyl(triethyl)azanium;chloride Chemical compound [Cl-].CC[N+](CC)(CC)CC1=CC=CC=C1 HTZCNXWZYVXIMZ-UHFFFAOYSA-M 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 6
- 229940006460 bromide ion Drugs 0.000 description 6
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 6
- JHJLBTNAGRQEKS-UHFFFAOYSA-M sodium bromide Chemical compound [Na+].[Br-] JHJLBTNAGRQEKS-UHFFFAOYSA-M 0.000 description 6
- 239000005708 Sodium hypochlorite Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 230000007062 hydrolysis Effects 0.000 description 5
- 238000006460 hydrolysis reaction Methods 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 150000001450 anions Chemical class 0.000 description 4
- 238000006555 catalytic reaction Methods 0.000 description 4
- VYFOAVADNIHPTR-UHFFFAOYSA-N isatoic anhydride Chemical compound NC1=CC=CC=C1CO VYFOAVADNIHPTR-UHFFFAOYSA-N 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 239000012074 organic phase Substances 0.000 description 4
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
- 150000001298 alcohols Chemical class 0.000 description 3
- QTQUJRIHTSIVOF-UHFFFAOYSA-N amino(phenyl)methanol Chemical compound NC(O)C1=CC=CC=C1 QTQUJRIHTSIVOF-UHFFFAOYSA-N 0.000 description 3
- 239000008346 aqueous phase Substances 0.000 description 3
- 239000004202 carbamide Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- JMMWKPVZQRWMSS-UHFFFAOYSA-N isopropanol acetate Natural products CC(C)OC(C)=O JMMWKPVZQRWMSS-UHFFFAOYSA-N 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000003960 organic solvent Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N urethane group Chemical group NC(=O)OCC JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 3
- WNZQDUSMALZDQF-UHFFFAOYSA-N 2-benzofuran-1(3H)-one Chemical class C1=CC=C2C(=O)OCC2=C1 WNZQDUSMALZDQF-UHFFFAOYSA-N 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910019093 NaOCl Inorganic materials 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- RWZYAGGXGHYGMB-UHFFFAOYSA-N anthranilic acid Chemical compound NC1=CC=CC=C1C(O)=O RWZYAGGXGHYGMB-UHFFFAOYSA-N 0.000 description 2
- CHQVQXZFZHACQQ-UHFFFAOYSA-M benzyl(triethyl)azanium;bromide Chemical compound [Br-].CC[N+](CC)(CC)CC1=CC=CC=C1 CHQVQXZFZHACQQ-UHFFFAOYSA-M 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 239000012043 crude product Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000012280 lithium aluminium hydride Substances 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- RULWBFLPUAFFGY-UHFFFAOYSA-N 2-(hydroxymethyl)benzamide Chemical compound NC(=O)C1=CC=CC=C1CO RULWBFLPUAFFGY-UHFFFAOYSA-N 0.000 description 1
- NLLUNRCIKRPYMQ-UHFFFAOYSA-N 6-nitro-1,4-dihydro-3,1-benzoxazin-2-one Chemical class N1C(=O)OCC2=CC([N+](=O)[O-])=CC=C21 NLLUNRCIKRPYMQ-UHFFFAOYSA-N 0.000 description 1
- 241001120493 Arene Species 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 238000007167 Hofmann rearrangement reaction Methods 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910001513 alkali metal bromide Inorganic materials 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 229910001860 alkaline earth metal hydroxide Inorganic materials 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000012736 aqueous medium Substances 0.000 description 1
- 150000003842 bromide salts Chemical class 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 150000001649 bromium compounds Chemical class 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 229940112021 centrally acting muscle relaxants carbamic acid ester Drugs 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 150000001805 chlorine compounds Chemical class 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 150000003983 crown ethers Chemical class 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- RIMIDGSPFGJFCN-UHFFFAOYSA-N hydroxymethyl benzoate Chemical class OCOC(=O)C1=CC=CC=C1 RIMIDGSPFGJFCN-UHFFFAOYSA-N 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229940011051 isopropyl acetate Drugs 0.000 description 1
- GWYFCOCPABKNJV-UHFFFAOYSA-M isovalerate Chemical compound CC(C)CC([O-])=O GWYFCOCPABKNJV-UHFFFAOYSA-M 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001509 metal bromide Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000004714 phosphonium salts Chemical class 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000009790 rate-determining step (RDS) Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000012258 stirred mixture Substances 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 125000005497 tetraalkylphosphonium group Chemical group 0.000 description 1
- JRMUNVKIHCOMHV-UHFFFAOYSA-M tetrabutylammonium bromide Chemical compound [Br-].CCCC[N+](CCCC)(CCCC)CCCC JRMUNVKIHCOMHV-UHFFFAOYSA-M 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 1
- 235000019801 trisodium phosphate Nutrition 0.000 description 1
- 150000007968 uric acids Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D265/00—Heterocyclic compounds containing six-membered rings having one nitrogen atom and one oxygen atom as the only ring hetero atoms
- C07D265/04—1,3-Oxazines; Hydrogenated 1,3-oxazines
- C07D265/12—1,3-Oxazines; Hydrogenated 1,3-oxazines condensed with carbocyclic rings or ring systems
- C07D265/14—1,3-Oxazines; Hydrogenated 1,3-oxazines condensed with carbocyclic rings or ring systems condensed with one six-membered ring
- C07D265/18—1,3-Oxazines; Hydrogenated 1,3-oxazines condensed with carbocyclic rings or ring systems condensed with one six-membered ring with hetero atoms directly attached in position 2
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7933442 | 1979-09-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE8006761L SE8006761L (sv) | 1981-03-28 |
| SE457170B true SE457170B (sv) | 1988-12-05 |
Family
ID=10508087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE8006761A SE457170B (sv) | 1979-09-27 | 1980-09-26 | Foerfarande foer framstaellning av 2-oxo-dihydrobenso / d / / 1,3 / -oxaziner |
Country Status (16)
| Country | Link |
|---|---|
| US (1) | US4301283A (da) |
| JP (1) | JPS5673049A (da) |
| AT (1) | AT375653B (da) |
| BE (1) | BE885416A (da) |
| CH (1) | CH647240A5 (da) |
| DE (1) | DE3035792C2 (da) |
| DK (1) | DK149887C (da) |
| FI (1) | FI73211C (da) |
| FR (1) | FR2466464A1 (da) |
| GB (1) | GB2060631B (da) |
| IE (1) | IE50245B1 (da) |
| IT (1) | IT1129278B (da) |
| LU (1) | LU82806A1 (da) |
| NL (1) | NL8005364A (da) |
| NO (1) | NO153769C (da) |
| SE (1) | SE457170B (da) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4446319A (en) * | 1981-04-28 | 1984-05-01 | Takeda Chemical Industries, Ltd. | Aminocyclitols and their production |
| DE102007005283A1 (de) * | 2007-02-02 | 2008-08-07 | Cognis Ip Management Gmbh | Lösungsmittel für Phasentransfer-katalysierte Reaktionen |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3526621A (en) * | 1966-08-03 | 1970-09-01 | Farmaceutical Italia Soc | Substituted 3,1-benzoxazin-2-one |
| US3705154A (en) * | 1971-07-08 | 1972-12-05 | Ashland Oil Inc | Synthesis of 4h-3,1-benzoxazin-2(1h)-one |
-
1980
- 1980-09-10 US US06/185,990 patent/US4301283A/en not_active Expired - Lifetime
- 1980-09-23 DE DE3035792A patent/DE3035792C2/de not_active Expired
- 1980-09-25 FR FR8020621A patent/FR2466464A1/fr active Granted
- 1980-09-26 JP JP13415180A patent/JPS5673049A/ja active Pending
- 1980-09-26 NO NO802844A patent/NO153769C/no unknown
- 1980-09-26 DK DK406580A patent/DK149887C/da active
- 1980-09-26 IT IT68497/80A patent/IT1129278B/it active
- 1980-09-26 LU LU82806A patent/LU82806A1/de unknown
- 1980-09-26 AT AT0482980A patent/AT375653B/de not_active IP Right Cessation
- 1980-09-26 SE SE8006761A patent/SE457170B/sv not_active IP Right Cessation
- 1980-09-26 GB GB8031144A patent/GB2060631B/en not_active Expired
- 1980-09-26 FI FI803041A patent/FI73211C/fi not_active IP Right Cessation
- 1980-09-26 BE BE0/202242A patent/BE885416A/fr not_active IP Right Cessation
- 1980-09-26 IE IE2024/80A patent/IE50245B1/en unknown
- 1980-09-26 NL NL8005364A patent/NL8005364A/nl active Search and Examination
- 1980-09-26 CH CH7242/80A patent/CH647240A5/de not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| FR2466464B1 (da) | 1983-05-20 |
| FI803041A7 (fi) | 1981-03-28 |
| IT1129278B (it) | 1986-06-04 |
| IE50245B1 (en) | 1986-03-05 |
| NO153769C (no) | 1986-07-02 |
| NO153769B (no) | 1986-02-10 |
| DK149887B (da) | 1986-10-20 |
| JPS5673049A (en) | 1981-06-17 |
| SE8006761L (sv) | 1981-03-28 |
| IE802024L (en) | 1981-03-27 |
| GB2060631B (en) | 1983-07-20 |
| LU82806A1 (de) | 1980-12-15 |
| NL8005364A (nl) | 1981-03-31 |
| FI73211C (fi) | 1987-09-10 |
| US4301283A (en) | 1981-11-17 |
| BE885416A (fr) | 1981-01-16 |
| NO802844L (no) | 1981-03-30 |
| DK149887C (da) | 1987-04-27 |
| FR2466464A1 (fr) | 1981-04-10 |
| DK406580A (da) | 1981-03-28 |
| FI73211B (fi) | 1987-05-29 |
| AT375653B (de) | 1984-08-27 |
| IT8068497A0 (it) | 1980-09-26 |
| DE3035792A1 (de) | 1981-04-16 |
| ATA482980A (de) | 1984-01-15 |
| CH647240A5 (de) | 1985-01-15 |
| DE3035792C2 (de) | 1987-01-15 |
| GB2060631A (en) | 1981-05-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NUG | Patent has lapsed |
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