Pyridine → HCID 21071920, compound

Participants

Reaction Steps

A mixture of 5-fluoroindoline from above, 5-chlorosulfonyl-2-oxindole (6.1 g, 1.2 equivalent) and pyridine (7.1 mL) in dichloromethane (40 mL) was stirred at room temperature overnight. The reaction was concentrated and the residue was recrystallized from methanol to give 5 g (68% yield) of 5-(5-fluoro-2,3-dihydro-indole-1-sulfonyl)-1,3-dihydro-indol-2-one as a pink-colored solid. 1H-NMR (360 MHz, dimethylsulfoxide-d6) δ 10.75 (br s, 1H, NH), 7.60 (m, 2H), 7.60 (dd, 1H), 7.02 (m, 2H), 6.90 (d, 1H), 3.89 (t, 2H, CH2), 3.52 (s, 2H, CH2), 2.87 (t, 2H, CH2). MS 331 [M+−1].

Provenance & Evidence