abstract |
A process for the preparation of a compound of formula I (R1, R2, R3, R4, R5 and R6 have the meanings defined in the description), comprising formula II ′ (R1, R2, R3, R4, R5 and R6 is as defined above). A process comprising reacting an acrylic acid chloride compound with water-soluble hydroxylamine and optionally converting the resulting compound to its salt addition salt. |