| abstract |
The subject of the invention is a new process for the preparation of the compounds of formula I in which - n is in particular 2 to 5 and R represents Cl, Br or F - Z represents in particular hydrogen, characterized in that the haloformate of formula II is reacted R and n having the meaning indicated above, Y representing a halogen, on NH₂CH₂CH₂Cl, to obtain the compound of formula Ibis in which R has the meanings indicated above, and in that the Ibis compound is directly treated with nitrosylsulfuric acid. |