GB1392256A - Optically active alanine derivatives - Google Patents
Optically active alanine derivativesInfo
- Publication number
- GB1392256A GB1392256A GB280773A GB280773A GB1392256A GB 1392256 A GB1392256 A GB 1392256A GB 280773 A GB280773 A GB 280773A GB 280773 A GB280773 A GB 280773A GB 1392256 A GB1392256 A GB 1392256A
- Authority
- GB
- United Kingdom
- Prior art keywords
- optically active
- alanine
- solution
- phenol
- alpha
- 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
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1392256 Preparation of optically active alanine derivatives TANABE SEIYAKU CO Ltd 19 Jan 1973 [22 Jan 1972 (2)] 2807/73 Heading C2C Alpha - methyl - beta - (3,4 - methylenedioxyphenyl) - DL - alanine p - phenol - sulfonate is resolved into its optically active enantiomers by forming a supersaturated solution in a solvent with one of the enantiomers predominant by being present in excess over the other in a solution and/or by being present in contact with the solution as a seeding, allowing the predominent enantiomer to crystallize out and recovering it from the mother liquor. Optically active alpha-methyl-beta-(3,4-dihydroxyphenyl alanine is obtained by adding one optically active enantiomer of alpha-methylbeta - (3,4 - methylene - dioxyphenyl) - alanine p-phenol-sulfonate to an aqueous solution of the DL phenol-sulfonate compound, supersaturating the solution, permitting the one optically active enantiomer to crystallize from the supersaturated solution, recovering the crystallized optically active enantiomer, treating it with an alkaline agent or ion exchange resin and then hydrolysing the resultant optically active alpha-methyl-beta-(3,4-methylene-dioxyphenyl)-alanine with a concentrated hydrohalogenic acid in the presence of phenol.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP859472A JPS4921139B2 (en) | 1972-01-22 | 1972-01-22 | |
| JP859572A JPS5145583B2 (en) | 1972-01-22 | 1972-01-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1392256A true GB1392256A (en) | 1975-04-30 |
Family
ID=26343141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB280773A Expired GB1392256A (en) | 1972-01-22 | 1973-01-19 | Optically active alanine derivatives |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2169103B1 (en) |
| GB (1) | GB1392256A (en) |
-
1973
- 1973-01-19 GB GB280773A patent/GB1392256A/en not_active Expired
- 1973-01-19 FR FR7302025A patent/FR2169103B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR2169103A1 (en) | 1973-09-07 |
| FR2169103B1 (en) | 1976-05-14 |
| DE2302937B2 (en) | 1976-04-15 |
| DE2302937A1 (en) | 1973-07-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |