DE2558508C3 - Verfahren zur Racematspaltung von DL-Pantolacton - Google Patents
Verfahren zur Racematspaltung von DL-PantolactonInfo
- Publication number
- DE2558508C3 DE2558508C3 DE2558508A DE2558508A DE2558508C3 DE 2558508 C3 DE2558508 C3 DE 2558508C3 DE 2558508 A DE2558508 A DE 2558508A DE 2558508 A DE2558508 A DE 2558508A DE 2558508 C3 DE2558508 C3 DE 2558508C3
- Authority
- DE
- Germany
- Prior art keywords
- pantolactone
- water
- solution
- mixture
- crystals
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
- C07D307/26—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
- C07D307/30—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D307/32—Oxygen atoms
- C07D307/33—Oxygen atoms in position 2, the oxygen atom being in its keto or unsubstituted enol form
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Furan Compounds (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP50021330A JPS5198269A (en) | 1975-02-19 | 1975-02-19 | Dll pantorakutonnokogakubunkatsuho |
Publications (3)
Publication Number | Publication Date |
---|---|
DE2558508A1 DE2558508A1 (de) | 1976-09-02 |
DE2558508B2 DE2558508B2 (de) | 1978-12-07 |
DE2558508C3 true DE2558508C3 (de) | 1979-08-02 |
Family
ID=12052116
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE2558508A Expired DE2558508C3 (de) | 1975-02-19 | 1975-12-24 | Verfahren zur Racematspaltung von DL-Pantolacton |
Country Status (3)
Country | Link |
---|---|
US (1) | US4045450A (US07413550-20080819-C00001.png) |
JP (1) | JPS5198269A (US07413550-20080819-C00001.png) |
DE (1) | DE2558508C3 (US07413550-20080819-C00001.png) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58156157U (ja) * | 1982-04-15 | 1983-10-18 | 三菱自動車工業株式会社 | 低温始動補助装置 |
JPS62128157U (US07413550-20080819-C00001.png) * | 1986-02-05 | 1987-08-13 | ||
US5364885A (en) * | 1992-11-13 | 1994-11-15 | Ahluwalia Gurpreet S | Reduction of hair growth |
KR19980059286A (ko) * | 1996-12-31 | 1998-10-07 | 박영구 | D-(-)-판토락톤의 제조방법 |
FR2796938B1 (fr) * | 1999-07-29 | 2004-04-02 | Ppg Sipsy | Nouveaux derives chiraux n-substitues de la norephedrine, leur preparation et leur utilisation pour la synthese de composes fonctionnalises optiquement actifs par transfert d'hydrogene |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2460239A (en) * | 1945-07-04 | 1949-01-25 | Nopco Chem Co | Resolution of racemic alpha hydroxy beta, beta dimethyl gamma butyrolactone |
US2460240A (en) * | 1945-07-04 | 1949-01-25 | Nopco Chem Co | Resolution of racemic alpha hydroxy beta, beta dimethyl gamma butyrolactone |
-
1975
- 1975-02-19 JP JP50021330A patent/JPS5198269A/ja active Granted
- 1975-12-24 DE DE2558508A patent/DE2558508C3/de not_active Expired
-
1976
- 1976-02-12 US US05/657,660 patent/US4045450A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPS5198269A (en) | 1976-08-30 |
DE2558508B2 (de) | 1978-12-07 |
JPS5535391B2 (US07413550-20080819-C00001.png) | 1980-09-12 |
US4045450A (en) | 1977-08-30 |
DE2558508A1 (de) | 1976-09-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C3 | Grant after two publication steps (3rd publication) |