申请人:——
公开号:US20040220410A1
公开(公告)日:2004-11-04
The invention relates to &bgr;-alanine amides of general formula (I), wherein: R
1
represents hydrogen or C
1-6
alkyl that is optionally substituted by hydroxy, amino, carboxy, carbamoyl, methylmercapto, guanidino, optionally substituted aryl or heteroaryl, and; R
2
represents hydrogen or R
1
and R
2
, together, form a group of formula —(CH
2
)
n
—, wherein n is 3 or 4. Said &bgr;-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 (&bgr;-alanyl-histamine, R?1
=imidazol-4-ylmethyl, R
2
=H), a naturally occurring pseudo dipeptide, which is used as an active ingredient having an antioxidative effect in medicaments and cosmetics.
本发明涉及通式(I)的&bgr;-丙氨酸酰胺,其中:R
1
代表氢或 C
1-6
烷基,该烷基可任选被羟基、氨基、羧基、氨基甲酰基、甲巯基、胍基、任选取代的芳基或杂芳基取代,以及;R
2
代表氢或 R
1
和 R
2
共同组成一个式-(CH
2
)
n
-,其中 n 为 3 或 4。通过使相应的胺与氰乙酸酯反应生成乙酰胺,然后进行催化氢化反应,可以在不使用氨基保护基团的情况下生产出上述&bgr;-丙氨酸酰胺。该方法尤其适用于生产卡辛(&bgr;-丙氨酰-组胺,R?1
咪唑-4-基甲基,R
2
H),这是一种天然存在的假二肽,在药物和化妆品中用作具有抗氧化作用的活性成分。