Phenolate → tert-butyl 4-(2-(4-(7-(4-amino-2-fluorophenoxy)thieno[3,2-b]pyridin-2-yl)-1H-imidazol-1-yl)ethyl)piperazine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 4-amino-2-fluorophenol x HCl (1.64 g, 10.05 mmol) in NMP (30 mL) was added t-BuOK (2.25 g, 20.1 mmol). After 30 min, compound 305 (3.75 g, 8.37 mmol) was added and the reaction mixture was heated at 100° C. for 1 h. A solution of 4-amino-2-fluorophenol HCl (1.64 g, 10.05 mmol) in NMP (30 mL) in a separate flask was treated with t-BuOK (2.25 g, 20.1 mmol) and the resultant phenolate solution was added to the reaction mixture at 100° C. After 30 min, the reaction was quenched by addition of water and the precipitate was collected by filtration, dried and triturated with MTBE to afford the title compound 306 (2.10 g, 3.90 mmol, 47% yield) as a beige solid. MS (m/z): 539.39 (M+H).

Provenance & Evidence