Quinoline derivatives, process for preparing them and use for the treatment of diseases mediated by s-CD23

1. A compound of formula (I):

2. A compound of formula (IA):

3. A pharmaceutical composition which comprises a compound according to claim 1 and optionally a pharmaceutically acceptable carrier therefor.

4. A process for preparing a compound according to claim 1 which process comprises:

(a) deprotecting a compound of formula (II):

wherein P is a protecting group selected from the group consisting of benzyl, tetrahydropyranyl and p-methoxybenzyl, or

(b) formylating a compound of formula (III):

or (c) oxidising a compound of formula (X):

5. A compound of formula (II):

wherein P is a protecting group selected from the group consisting of benzyl, tetrahydropyranyl and p-methoxybenzyl.

6. A compound of formula (III):

7. A compound of formula (X):