Acetic Anhydride → HCID 46852606, compound

Participants

Reaction Steps

To a stirred solution of 1-(azetidin-3-ylcarbonyl)-4-cyclobutyl-1,4-diazepane (100 mg, 0.42 mmol) in dichloromethane (10 mL) cooled to 0° C. was added diisopropylethylamine (160 mg, 1.26 mmol) and acetic anhydride (45 mg, 0.51 mmol). The resulting mixture was stirred at RT for 3 h before it was quenched by addition of water (10 ml). The aqueous layer was extracted with dichloromethane (3×10 ml) and the combined organic layers were washed with saturated aqueous NaHCO3 (10 ml), dried (Na2SO4), filtered and concentrated. Purification by silica FCC (using a gradient of eluents; 100:0 to 99:1 DCM:2M NH3 in MeOH) followed by purification by preparative HPLC (Method 2) gave the title compound (35 mg, 30% yield) as colourless oil.

Provenance & Evidence