反应详情

Following a procedure analogous to Intermediate 5, Step A using methyl 3-amino-2-chlorobenzoate (39 g, 211 mmol) in DCM (200 mL) was added pyridine (51 g, 633 mmol) and 2,6-difluorobenzene-1-sulfonyl chloride (49.1 g, 232 mmol) the title compound was obtained (62 g, 81.6% yield). 1H NMR (400 MHz, CDCl3) δ ppm 7.87 (dd, J=1.8 Hz, 8.38 Hz, 1H), 7.72-7.79 (br, 1H), 7.56 (dd, J=1.8 Hz, 7.94 Hz, 1H), 7.45-7.53 (m, 1H), 7.28 (dd, J=7.9 Hz, 8.4 Hz, 1H), 6.95-7.01 (m, 2H), 3.89 (s, 3H).