RU98117730A - METHOD FOR PRODUCING FREE α-HYDROXIC ACIDS FROM THEIR AMMONIUM SALTS - Google Patents
METHOD FOR PRODUCING FREE α-HYDROXIC ACIDS FROM THEIR AMMONIUM SALTSInfo
- Publication number
- RU98117730A RU98117730A RU98117730/04A RU98117730A RU98117730A RU 98117730 A RU98117730 A RU 98117730A RU 98117730/04 A RU98117730/04 A RU 98117730/04A RU 98117730 A RU98117730 A RU 98117730A RU 98117730 A RU98117730 A RU 98117730A
- Authority
- RU
- Russia
- Prior art keywords
- heated
- water
- substituents
- hydroxy acids
- producing
- Prior art date
Links
- 150000003863 ammonium salts Chemical class 0.000 title claims 6
- 239000002253 acid Substances 0.000 title 1
- 150000007513 acids Chemical class 0.000 title 1
- 238000004519 manufacturing process Methods 0.000 title 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims 10
- 229940061720 alpha hydroxy acid Drugs 0.000 claims 10
- 150000001280 alpha hydroxy acids Chemical class 0.000 claims 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 10
- 125000001424 substituent group Chemical group 0.000 claims 8
- 229910021529 ammonia Inorganic materials 0.000 claims 5
- 239000000203 mixture Substances 0.000 claims 5
- 125000000217 alkyl group Chemical group 0.000 claims 3
- 229910052739 hydrogen Inorganic materials 0.000 claims 3
- 239000001257 hydrogen Substances 0.000 claims 3
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims 3
- 125000003342 alkenyl group Chemical group 0.000 claims 2
- 125000000623 heterocyclic group Chemical group 0.000 claims 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims 2
- 125000002941 2-furyl group Chemical group O1C([*])=C([H])C([H])=C1[H] 0.000 claims 1
- 125000004105 2-pyridyl group Chemical group N1=C([*])C([H])=C([H])C([H])=C1[H] 0.000 claims 1
- 125000000389 2-pyrrolyl group Chemical group [H]N1C([*])=C([H])C([H])=C1[H] 0.000 claims 1
- 125000000175 2-thienyl group Chemical group S1C([*])=C([H])C([H])=C1[H] 0.000 claims 1
- 125000003682 3-furyl group Chemical group O1C([H])=C([*])C([H])=C1[H] 0.000 claims 1
- 125000003349 3-pyridyl group Chemical group N1=C([H])C([*])=C([H])C([H])=C1[H] 0.000 claims 1
- 125000001397 3-pyrrolyl group Chemical group [H]N1C([H])=C([*])C([H])=C1[H] 0.000 claims 1
- 125000001541 3-thienyl group Chemical group S1C([H])=C([*])C([H])=C1[H] 0.000 claims 1
- 125000000339 4-pyridyl group Chemical group N1=C([H])C([H])=C([*])C([H])=C1[H] 0.000 claims 1
- 125000003545 alkoxy group Chemical group 0.000 claims 1
- 125000004414 alkyl thio group Chemical group 0.000 claims 1
- 125000003118 aryl group Chemical group 0.000 claims 1
- 125000004104 aryloxy group Chemical group 0.000 claims 1
- 125000000753 cycloalkyl group Chemical group 0.000 claims 1
- 229910052736 halogen Inorganic materials 0.000 claims 1
- 150000002367 halogens Chemical group 0.000 claims 1
- 239000003960 organic solvent Substances 0.000 claims 1
Claims (5)
где R представляет водород, алкил, который может иметь заместители, алкенил, который может иметь заместители, циклоалкил, который может иметь заместители, алкокси, который может иметь заместители, арил, который может иметь заместители, арилокси, который может иметь заместители, насыщенную гетероциклическую группу, которая может иметь заместители, или ненасыщенную гетероциклическую группу, которая может иметь заместители, нагревают, образующиеся аммиак и воду удаляют, затем к остатку добавляют воду и полученную смесь нагревают.1. The method of producing α-hydroxyacid, in which the ammonium salt of α-hydroxyacid of formula 1
where R represents hydrogen, alkyl, which may have substituents, alkenyl, which may have substituents, cycloalkyl, which may have substituents, alkoxy, which may have substituents, aryl, which may have substituents, aryloxy, which may have substituents, a saturated heterocyclic group , which may have substituents, or an unsaturated heterocyclic group, which may have substituents, are heated, the formed ammonia and water are removed, then water is added to the residue, and the resulting mixture is heated.
где R имеет значения, определенные выше, нагревают при пониженном давлении, образующиеся аммиак и воду удаляют, а затем к остатку добавляют воду и полученную смесь нагревают.2. A method of producing α-hydroxyacid, in which the ammonium salt of α-hydroxyacid of formula 1,
where R is as defined above, is heated under reduced pressure, the ammonia and water formed are removed, and then water is added to the residue and the resulting mixture is heated.
где R имеет значения, определенные выше, нагревают в органических растворителях, образующиеся аммиак и воду удаляют, затем к остатку добавляют воду и полученную смесь нагревают.3. The method of producing α-hydroxy acids, in which the ammonium salt of α-hydroxy acids of formula 1,
where R is as defined above, is heated in organic solvents, the ammonia formed and water are removed, then water is added to the residue and the resulting mixture is heated.
где R представляет водород или группу, выбранную из группы, включающей алкил, имеющий от 1 до 6 углеродов (который может быть замещен галогеном или алкилтио, имеющим от 1 до 6 углеродов), алкенил, имеющий от 2 до 6 углеродов, фенил, 2-пиридил, 3-пиридил, 4-пиридил, 2-тиенил, 3-тиенил, 2-пирролил, 3-пирролил, 2-фурил и 3-фурил, нагревают, образующиеся аммиак и воду удаляют, затем к остатку добавляют воду и полученную смесь нагревают.4. The method of producing α-hydroxy acids, in which the ammonium salt of α-hydroxy acids of formula 1,
where R represents hydrogen or a group selected from the group comprising alkyl having from 1 to 6 carbons (which may be substituted by halogen or alkylthio having from 1 to 6 carbons), alkenyl having from 2 to 6 carbons, phenyl, 2- pyridyl, 3-pyridyl, 4-pyridyl, 2-thienyl, 3-thienyl, 2-pyrrolyl, 3-pyrrolyl, 2-furyl and 3-furyl, heated, the resulting ammonia and water were removed, then water was added to the residue and the resulting mixture heated up.
где R представляет водород, алкил, имеющий от 1 до 6 углеродов, C1-C6алкилтио-C1-C6алкил или фенил, нагревают, образующиеся аммиак и воду удаляют, затем к остатку добавляют воду и полученную смесь нагревают.5. The method of producing α-hydroxy acids, in which the ammonium salt of α-hydroxy acids of formula 1,
where R is hydrogen, alkyl having from 1 to 6 carbons, C 1 -C 6 alkylthio-C 1 -C 6 alkyl or phenyl are heated, the ammonia and water formed are removed, then water is added to the residue and the resulting mixture is heated.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8/63672 | 1996-02-26 | ||
| JP6367296 | 1996-02-26 | ||
| JP8/73230 | 1996-03-04 | ||
| JP32341196 | 1996-11-19 | ||
| JP8/323411 | 1996-11-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| RU98117730A true RU98117730A (en) | 2000-07-20 |
| RU2165407C2 RU2165407C2 (en) | 2001-04-20 |
Family
ID=26404811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RU98117730A RU2165407C2 (en) | 1996-02-26 | 1997-02-25 | Method of preparing free alpha-hydroxy acids from ammonium slats thereof (variants) |
Country Status (1)
| Country | Link |
|---|---|
| RU (1) | RU2165407C2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004020113A1 (en) * | 2004-04-24 | 2005-11-17 | Bayer Materialscience Ag | Extraction of phenol-containing wastewater streams |
| DE102009009580A1 (en) * | 2009-02-19 | 2010-08-26 | Evonik Degussa Gmbh | Process for the preparation of free acids from their salts |
| RU2535680C2 (en) * | 2012-04-24 | 2014-12-20 | Валерий Федорович Швец | Method of processing ammonium lactate into lactic acid and esters thereof |
-
1997
- 1997-02-25 RU RU98117730A patent/RU2165407C2/en not_active IP Right Cessation
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