反应详情

Intermediate I-14a was prepared from 5-amino-1-(4-bromo-2-fluoro-phenyl)-6,7-difluoro-4-methoxy-1,3-dihydro-benzoimidazol-2-one (I-12a: 1.7 g, 0.00438 mol) and borontribromide using procedures analogous to those used for the preparation of Intermediate I-13a in DCM (10.9 mL, 0.0109 mol) to afford 850 mg of the product (88% yield).