| abstract |
The present invention provides a compound of formula (IV) wherein R is Cl, Br, NO 2 , OH or OR 'and R' is alkyl, and its use in the synthesis of reposetirizine, And its use in the synthesis of (-)-1-[(4-chlorophenyl) -phenyl methyl] piperazine, an intermediate useful for the synthesis of levocetirizine. The present invention also provides compounds (II) and (III) useful for the synthesis of compound (IV). |