Coixol → 6-methoxy-3-{2-[4-(4-chloro-3-methoxy-phenyl)-piperazin-1-yl]-2-oxo-ethyl}-3H-benzooxazol-2-one

Beteiligte Stoffe

Reaktionsschritte

In a 4 mL vial was added 2-chloro-1-[4-(4-chloro-3-methoxy-phenyl)-piperazin-1-yl]-ethanone (1) (200 mg, 0.66 mmol, 1.0 equiv), 6-methoxy-3H-benzooxazol-2-one (114 mg, 0.69 mmol, 1.05 equiv), K2CO3 (365 mg, 2.64 mmol, 4.0 equiv) and 2.5 mL of NMP. A stir bar was placed in the vial and the vial was then capped. The resultant mixture stirred at 60° C. overnight. The crude product was purified by reversed phase HPLC (acetonitrile —H2O with 0.1% TFA as the eluent) to yield 6-methoxy-3-{2-[4-(4-chloro-3-methoxy-phenyl)-piperazin-1-yl]-2-oxo-ethyl}-3H-benzooxazol-2-one (17): HPLC retention time, 2.33 minutes (Agilent Zorbax SB-C18, 2.1×50 mm, 5μ, 35° C.) using 1 ml/min flow rate, a 2.5 minute gradient of 20% to 100% B with a 1.1 minute wash at 100% B (A=0.1% formic acid/5% acetonitrile/94.9% water, B=0.1% formic acid/5% water/94.9% acetonitrile); MS (ES) M+H expected, 431.9, found, 431.9.

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