Potassium Iodide → 5-Chloro-2-(4-{3-[7-(1-hydroxy-1-methyl-ethyl)-11H-10-oxa-1-aza-dibenzo[a,d]cyclohepten-5-ylidene]-propyl}-piperazin-1-yl)-benzoic Acid Methyl Ester

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-chloro-2-piperazin-1-yl-benzoic acid methyl ester (0.23 g, 0.916 mmol) in isopropanol (8.0 mL) was added 2,6-lutidine (0.16 mL, 1.33 mmol) and catalytic potassium iodide. This mixture was heated to 80° C. and treated with 2-[5-(3-bromo-propylidene)-5,11-dihydro-10-oxa-1-aza-dibenzo[a,d]cyclohepten-7-yl]-propan-2-ol (0.26 g, 0.67 mmol) in portions over 2 h. The solution was then stirred at 80° C. for an additional 18 h. The reaction mixture was concentrated in vacuo, then purified by flash chromatography on silica gel (gradient elution from 95% ethyl acetate/5% methanol to 90% ethyl acetate/10% Methanol) to yield the title compound. 1H-NMR (DMSO) δ: 1.40 (6H, s), 2.15–2.55 (8H, m), 2.75–2.95 (4H, m), 3.75 (3H, s), 5.20 (2H, br s), 6.10 (1H, t), 6.65 (1H, dd), 7.00–7.60 (6H, m), 7.70 (1H, dd), 8.50 (1H, dd). ESI-MS m/z: 548 (M+1), UV retention time: 1.56 min.

Provenance & Evidence