E-isomeric ß-(hetero) aromatically substituted acylaminoacrylates are of great economic interest since with them, by means of hydration, precursors of appropriately substituted (ß-amino acids can be prepared and, by doing so, lead to higher enantio-selectivities than the corresponding Z-isomers. The invention describes novel E-isomeric R-aromatically or ß-heteroaromatically substituted ß-acylaminoacrylates of the general formula (I): in which R represents hydrogen or a substituted or unsubstituted alkyl or aromatic or heteroaromatic residue, and R' represents a substituted or unsubstituted aromatic or heteroaromatic residue, R' represents H, a substituted or unsubstituted alkyl or aromatic or heteroaromatic residue, and R'' represents H, a substituted or unsubstituted alkyl, acyl, aromatic or heteroaromatic residue. According to the invention, the compounds according to the general formula (I) are prepared by acylation at temperatures below the boiling point of the reaction mixture.
E-异构体ß-(杂)芳基取代的
酰胺基
丙烯酸酯具有巨大的经济价值,因为通过
水合作用,可以制备适当取代的(ß-
氨基酸的前体,并且通过这种方式,可以实现比相应的Z-异构体更高的对映选择性。该发明描述了一种新颖的E-异构体R-芳基或ß-杂芳基取代的ß-
酰胺基
丙烯酸酯,其一般式为(I):其中R代表
氢或取代或未取代的烷基或芳基或杂芳基残基,R'代表取代或未取代的芳基或杂芳基残基,R''代表
氢,取代或未取代的烷基或芳基或杂芳基残基。根据该发明,按照一般式(I)的化合物是通过在低于反应混合物沸点的温度下进行酰化制备的。