Hydrogen Peroxide → HCID 58817704, compound

Participants

Reaction Conditions

Reaction Steps

To a stirred solution of 4-(6-fluoro-benzo[d]isoxazol-3-yl)-piperidine-1-carboxylic acid tert-butyl ester (1.00 g, 3.13 mmol) in dry tetrahydrofuran (31.3 mL) cooled to −78° C. was added lithium diisopropylamide (1.72 mL, 3.35 mmoles). The resulting solution was stirred at −78° C. for 2 hours when trimethylborate (0.44 mL, 3.84 mmoles) was added. The resulting solution was stirred at −78° C. for 1 hour then was allowed to warm to room temperature over 3 hours when hydrogen peroxide (2.00 mL) and acetic acid (1.00 mL) were added. The resulting mixture was stirred at room temperature overnight when the mixture was quenched with saturated NH4Claq (20 mL) and 10% HClaq (20 mL). The resulting mixture was extracted with CH2Cl2 (4×50 mL). The combined extracts were washed with brine (50 mL), dried (MgSO4), filtered and evaporated. The residue was separated via column chromatography (1:1; Et2O/Pet. ether) yielding 0.619 g (59%) of the phenol as a white, crystalline solid, mp 169-170° C. Analysis calculated for C−17H21N2FO4; 60.70% C, 6.29% H, 8.33% N. Found: 60.72% C, 6.15% H, 8.22% N.

Provenance & Evidence