| abstract |
Disclosed are chroman derivatives of formula (I) wherein R<1> stands for acyl with 1-6 C-atoms, -CO-R<5> or an amino protective group; R<2> stands for H or alkyl with 1-6 C-atoms; R<3>, R<4> independently from one another stand for H, alkyl with 1-6 C-atoms, CN, Hal or COOR<2>; R<5> stands for phenyl which is unsubstituted or has been substituted once or twice by alkyl with 1-6 C-atoms, OR<2> or Hal; X stands for H, H or O; Hal stands for F, Cl, Br or I. Said derivatives and their salts can be used as intermediate products in the synthesis of medicaments. |