| 摘要 |
The invention relates to a process for the preparation of a compound of the formulawherein Q, Y, Z, R1, R2, R3, R4 and R5 are as defined in the specification, which comprisesa) reacting a compound of the formulawith a halogenating agent to form a compound of the formulaorb) converting a compound of formula (II) by means of a halogenating agent into a compound of the formulaoptionallyc) converting the compound of formula (IV) into a compound of formula (III);d) converting a compound of formula (III) by means of a compound of the formulainto a compound of the formulaore) converting a compound (IV) by means of a compound (V) into a compound (VI); andf) converting a compound (VI) by means of a chlorinating agent into a compound (I);a compound (IV); to a process for the preparation of a compound (III) and to a process for the preparation of a compound (IV). |
