申请人:Degussa Aktiengesellschaft
公开号:US04918223A1
公开(公告)日:1990-04-17
N-acylated mercapto-.alpha.-amino acids of the general formula ##STR1## are prepared by reacting a nitrile of the general formula R.sub.1 -CN (II) at a temperature between 0.degree. C. and 100.degree. C. in water or in a mixture of water and an organic solvent which is at least partially miscible with water, in the presence of a base with a mercapto-.alpha.-amino acid of the general formula ##STR2## and subsequently releasing the N-acylated mercapto-.alpha.-amino acid of general formula (I) with an acid. Mercapto-.alpha.-amino acids can be selectively acylated on the amino group in this manner in a relatively simple manner.
一般式为##STR1##的N-酰化巯基-.alpha.-氨基酸是通过在水或在至少部分可溶于水的有机溶剂混合物中,在碱的存在下,将一般式为R.sub.1 -CN (II)的腈在0℃到100℃的温度下与一般式为##STR2##的巯基-.alpha.-氨基酸反应,并随后用酸释放一般式为(I)的N-酰化巯基-.alpha.-氨基酸制备而成。这种方法可以相对简单地选择性酰化氨基上的巯基-.alpha.-氨基酸。