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RU98117730A - METHOD FOR PRODUCING FREE α-HYDROXIC ACIDS FROM THEIR AMMONIUM SALTS - Google Patents

METHOD FOR PRODUCING FREE α-HYDROXIC ACIDS FROM THEIR AMMONIUM SALTS

Info

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
Application number
RU98117730/04A
Other languages
Russian (ru)
Other versions
RU2165407C2 (en
Inventor
Коити Хаякава
Original Assignee
Ниппон Сода Ко., Лтд.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ниппон Сода Ко., Лтд. filed Critical Ниппон Сода Ко., Лтд.
Publication of RU98117730A publication Critical patent/RU98117730A/en
Application granted granted Critical
Publication of RU2165407C2 publication Critical patent/RU2165407C2/en

Links

Claims (5)

1. Способ получения α-гидроксикислоты, по которому аммониевую соль α-гидроксикислоты формулы 1
Figure 00000001

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
Figure 00000001

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.
2. Способ получения α-гидроксикислоты, по которому аммониевую соль α-гидроксикислоты формулы 1,
Figure 00000002

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,
Figure 00000002

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.
3. Способ получения α-гидроксикислоты, по которому аммониевую соль α-гидроксикислоты формулы 1,
Figure 00000003

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,
Figure 00000003

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.
4. Способ получения α-гидроксикислоты, по которому аммониевую соль α-гидроксикислоты формулы 1,
Figure 00000004

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,
Figure 00000004

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.
5. Способ получения α-гидроксикислоты, по которому аммониевую соль α-гидроксикислоты формулы 1,
Figure 00000005

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,
Figure 00000005

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.
RU98117730A 1996-02-26 1997-02-25 Method of preparing free alpha-hydroxy acids from ammonium slats thereof (variants) RU2165407C2 (en)

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

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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)

* Cited by examiner, † Cited by third party
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

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