Boron tribromide → HCID 70556883, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of [[1-(2-benzo[b]thiophen-3-yl-acetyl)-2-benzyloxymethyl-azetidine-2-carbonyl]-(4-chloro-benzyl)-amino]-acetic acid ethyl ester, Intermediate 163 (1 eq.) in DCM at 0° C. was added BBr3. The reaction was stirred at 0° C. for 2 h. The crude was diluted with DCM and poured into a saturated aqueous solution of NaHCO3. The layers were separated, the organic layer was dried over MgSO4, filtered and concentrated under reduced pressure. The crude was purified by chromatography on silica gel (elution with DCM/MeOH: 100/0 to 95/5) to afford [[1-(2-benzo[b]thiophen-3-yl-acetyl)-2-hydroxymethyl-azetidine-2-carbonyl]-(4-chloro-benzyl)-amino]-acetic acid ethyl ester.

Provenance & Evidence