3-(Bromomethyl)-1H-indazole, N1-BOC protected → HCID 69431219, compound

Participants

Reaction Steps

To a stirring solution of 1-[2-oxo-2-(2,3,4,5-tetrahydro-1H-1-benzazepin-1-yl)ethyl]-5-phenyl-1H-1,5-benzodiazepine-2,4(3H,5H)-dione (1.0 g, 2.28 mM) in 15 mL DMF at 0° C. was added 1.1 equiv. of 0.5 M solution of KN(TMS)2 in toluene. The resulting solution was stirred 10–30 min, then a solution of tert-butyl 3-(bromomethyl)-1H-indazole-1-carboxylate (0.78 g, 2.5 mM) in 3 mL DMF was added. The resulting solution was stirred 2 h at RT and then quenched with 5 mL of H2O. The reaction mixture was then poured into 50 mL of EtOAc and extracted with H2O (2×50 mL). The organic layer was separated, dried (MgSO4), and the solvents removed in vacuo. The resultant material was purified by silica gel flash column chromatography using hexanes/EtOAc 1/1 providing 1.4 g of white solid.

Provenance & Evidence