Boron tribromide → 2-(7-Amino-[1,2,4]triazolo[1,5-a]pyridin-2-yl)-phenol

Participants

Reaction Conditions

Reaction Steps

To a solution of 2-(2-methoxy-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-7-ylamine (2.3 g, 9.6 mmol) (Example 102, step c) in DCM (60 ml) was added a solution of BBr3 (1 M in DCM, 28.7 ml, 28.7 mmol). The mixture was allowed to warm up to 25° C. and stirring was continued for 2 h. Volatiles were removed under reduced pressure and the crude residue was extracted with DCM and washed with aq. NaHCO3 solution. The organic layer was washed with brine, dried over Na2SO4 and concentrated to get the crude product which was washed with 10% DCM in hexane to afford the title compound as off-white solid (1.3 g, 60%). LC-MS: m/z=227.4 [M+H]+.

Provenance & Evidence