申请人:Societe Civile Bioprojet
公开号:US06013829A1
公开(公告)日:2000-01-11
Process for the asymmetric synthesis of S-acyl derivatives of 2-mercaptomethyl-3-phenylpropanoic acid of formula (I): characterized in that it comprises the steps consisting in: a) preparing the diol (VI) by reduction of a malonic ester (V) in the presence of a hydride; b) preparing the monoacetates (VII R) or (VII S) respectively; c) subjecting these monoacetates to an oxidation in order to form the acids (IX S) or (IX R); d) saponifying the compounds (IX S) or (IX R) in order to form the hydroxy acids (X S) or (X R); e) thioacylating the hydroxy acids (X S) or (X R) with a mercapto acid R.sub.1 SH (XI), according to a Mitsunobu-type reaction, in order to lead to the desired acids (I R) (I S) respectively and application to the synthesis of N-(mercaptoacyl)amino acid derivatives (II). ##STR1##
对2-巯基甲基-3-苯丙酸的S-酰基衍生物的不对称合成过程的公式(I)的特征在于它包括以下步骤:a)通过在氢化物存在下还原马隆酸酯(V)来制备二醇(VI);b)分别制备单乙酸酯(VII R)或(VII S);c)将这些单乙酸酯氧化以形成酸(IX S)或(IX R);d)皂化化合物(IX S)或(IX R)以形成羟基酸(X S)或(X R);e)用巯基酸R.sub.1 SH (XI)对羟基酸(X S)或(X R)进行硫酰基化,根据Mitsunobu型反应,以得到所需的酸(I R)(I S),并应用于合成N-(巯基酰基)氨基酸衍生物(II)。