反应详情

The product of step A was coupled with sodium 3-chlorobenzenesulfinate following the procedure of Example 29, step C. Purification by flash column chromatography (SiO2, 100:0 to 30:70 hexanes/ethyl acetate) provided tert-butyl 7-(3-chlorophenylsulfonyl)-3,4-dihydrobenzofuro[3,2-c]pyridine-2(1H)-carboxylate (66 mg, 52%) as an oil: 1H NMR (CDCl3, 300 MHz) δ 8.06 (d, J=1.3 Hz, 1H), 7.92 (t, J=1.9 Hz, 1H), 7.83 (td, J=7.9, 1.4 Hz, 1H), 7.80 (d, J=8.0 Hz, 1H), 7.53 (d, J=8.2 Hz, 1H), 7.50 (m, 1H), 7.42 (t, J=7.9 Hz, 1H), 4.55 (br s, 2H), 3.83 (br s, 2H), 2.89 (br s, 2H), 1.49 (s, 9H).

1. customPurification by flash column chromatography (SiO2, 100:0 to 30:70 hexanes/ethyl acetate)