3-Bromopyridine → 3-Benzothiazol-6-yl-1-pyridin-3-yl-4-trifluoromethyl-imidazolidin-2-one

Beteiligte Stoffe

Reaktionsschritte

Using the same reaction conditions and work up as described in Example 1, step-3,1-benzothiazol-6-yl-5-trifluoromethyl-imidazolidin-2-one (I-172b: 0.1 g, 0.0004 mol) was refluxed with 3-bromo-pyridine (0.085 g, 0.0005 mol), copper iodide (0.0076 g, 0.00004 mol), N,N′-dimethyl-cyclohexane-1,2-diamine (0.017 g, 0.00012 mol), potassium phosphate (0.22 g, 0.0012 mol) and 1,4-dioxane (20 mL) at 120° C. for 12 hours to afford the crude product. The reaction was monitored by TLC (100% ethyl acetate). Purification by column chromatography on silica gel (2% methanol in DCM) afforded 54 mg of the product (45.2% yield).

Herkunft & Nachweise