申请人:Bioeurope
公开号:US04956489A1
公开(公告)日:1990-09-11
The invention relates to the preparation of water-soluble L-tyrosine derivatives having the formula ##STR1## where R.sub.1 is a L-malyl, L-lactyl, L-glutamyl or L-aspartyl group, R.sub.2 is a --OH, --OM, methoxy, ethoxy or amino group and M is an alkaline metal, by enzymatic condensation of an acid selected among L-malic, L-lactic, L-glutamic and L-aspartic acids, with a L-tyrosine derivatives selected among the ethyl and methyl esters and the amide of L-tyrosine. The enzyme is obtained from a culture of Micrococcus casealyticus. The compounds where R.sub.1 is a L-malyl or L-lactyl group are new. Said L-tyrosine derivatives are useful in cosmetic and pharmaceutical compositions, such as tanning and sun compositions.
本发明涉及制备水溶性的L-酪氨酸衍生物,其化学式为##STR1##其中R.sub.1为L-苹果酸基,L-乳酸基,L-谷氨酰基或L-天冬酰基;R.sub.2为--OH,--OM,甲氧基,乙氧基或氨基;M为碱金属。该衍生物通过酶催化反应制备而成,所选酸为L-苹果酸,L-乳酸,L-谷氨酸和L-天冬氨酸之一,所选的L-酪氨酸衍生物为L-酪氨酸乙酯,L-酪氨酸甲酯和L-酪氨酸酰胺之一。该酶从Micrococcus casealyticus的培养物中获得。其中,R.sub.1为L-苹果酸基或L-乳酸基的化合物是新的。所述L-酪氨酸衍生物可用于化妆品和制药组合物,例如晒黑和防晒组合物。