反应详情

The same operation as in Example (90a) was performed using 7-nitro-2,3-dihydro-4H-1,4-benzoxazine (described in Higuchi, Robert I.; Arienti, Kristen L.; Lopez, Francisco J.; Mani, Neelakhanda S.; Mais, Dale E.; Caferro, Thomas R.; Long, Yun Oliver; Jones, Todd K.; Edwards, James P.; Zhi, Lin; Schrader, William T.; et al.; J. Med. Chem.; 50; 10; 2007; 2486-2496, 0.6 g, 3.3 mmol), sodium hydride (55% content, 145 mg, 3.3 mmol), ethyl 2-chloromethyl-benzoate (1.95 g, 10.8 mmol) and DMF (30 mL). The resulting residue was purified by silica gel column chromatography (elution solvent: ethyl acetate/hexane=1/3, 2/3, 3/2, 3/1) to obtain 2.68 g of the title compound as a yellow solid (72%).

1. customThe resulting residue was purified by silica gel column chromatography (elution solvent: ethyl acetate/hexane=1/3, 2/3, 3/2, 3/1)