Process for the preparation of 3-amino-2 (het)aroyl-acrylic acid derivatives.

摘要

The present invention relates to a process for the preparation of 3-amino-2-(het)aroylacrylic acid derivatives of the formula (I) …… in which Y, R<1>, R, A, R<2>, X<1>, X<2>, X<3> and X<4> have the meaning given in the description, which are useful intermediates for the synthesis of highly active antibacterial medicaments.