Method for preparing β-alaninamides
US7358393B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2002 |
| Grant date | Apr 15, 2008 |
| Priority date | — |
| Expiry date | Nov 13, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/55
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to β-alanine amides of general formula (I), wherein: R1 represents hydrogen or C1-6 alkyl that is optionally substituted by hydroxy, amino, carboxy, carbamoyl, methylmercapto, guanidino, optionally substituted aryl or heteroaryl, and; R2 represents hydrogen or R1 and R2, together, form a group of formula —(CH2)n—, wherein n is 3 or 4. Said β-alanine amides are produced without using an amino protective group by reacting the corresponding amine with a cyanoacetic ester in order to form an acetamide and by effecting a subsequent catalytic hydrogenation. The method is suited, in particular, for producing carcinine (β-alanyl-histamine, R?1 =imidazol-4-ylmethyl, R2=H), a naturally occurring pseudo dipeptide, which is used as an active ingredient having an antioxidative effect in medicaments and cosmetics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.