Trifluoroacetic acid → (3r,4r)-Rel-4-azido-3-methoxypiperidine

Participants

Reaction Steps

To a stirred solution of 247A (310 mg, 1.21 mmol) in 2 mL of CH2Cl2 at room temperature was added TFA (2.00 mL, 26.0 mmoL). This mixture was stirred at room temperature for 15 min and concentrated in vacuo to give 390 mg of (3R,4R)-rel-4-azido-3-methoxypiperidine as the TFA salt. Compound 247B was prepared from this TFA salt (52.0 mg, 0.19 mmoL) in a similar process as described for 146E. It had an analytical HPLC retention time=1.97 min. (Phenomenox S5 C18-HC 4.6×50 mm column, 10-90% aqueous methanol over 4 minutes containing 0.1% TFA, 4 ml/min, monitoring at 220 nm) and a LC/MS M++1=409.

Provenance & Evidence