Acetic Acid → 6-Chloro-7-(2,3-dihydro-1H-indol-1-yl)-2-{4-[2-(4-morpholinyl)ethoxy]phenyl}-1H-imidazo[4,5-b]pyridine

Participants

Reaction Conditions

Reaction Steps

6,7-Dichloro-2-[4-(2-morpholin-4-ylethoxy)phenyl]-3H-imidazo[4,5-b]pyridine (Example 206) (30 mg 76 μmol) and indoline (0.10 ml, 790 μmol) were mixed in xylene (mixture of isomers, 0.75 ml) and heated in a microwave oven at 180° C. for 20 min. When cool again, water (0.75 ml) and acetic acid (0.75 ml) were added to the mixture, causing separation of two phases. The aqueous phase was separated and subjected to semi-preparative HPLC-C18. The appropriate fractions were pooled and evaporated in vacuo. The yellow oily residue was dissolved in EtOAc (20 ml). This solution was washed with 1% aqueous NaHCO3 (20 ml) and brine (10 ml). The organic phase was dried (MgSO4) and evaporated in vacuo to afford the pure product (31 mg, 85%) as a pale yellow powder.

Provenance & Evidence