m-Chloroperbenzoic acid → HCID 86608202, compound

Participants

Reaction Steps

(±)-Trans-3-(5,6-Dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-1-hydroxymethyl-4-(1H-indol-3-yl)-pyrrolidine-2,5-dione (0.06 g) in anhydrous tetrahydrofuran (5 ml) was treated with dibenzylphosphoramidate (0.156 ml, 3.5 equivalents) followed by the addition of tetrazole (3% solution in acetonitrile, 2 ml). The reaction mixture was stirred at room temperature for 20 min and cooled to −78° C. A solution of m-chloroperbenzoic acid (70%, 0.162 g) in dichloromethane (2 ml) was added at −78° C. After 5 min at −78° C., the reaction was brought to room temperature and stirred for 5 min Solvents were removed under reduced pressure and the residue was purified by flash chromatography on a silica column, eluted with ethyl acetate, hexane to give phosphoric acid dibenzyl ester trans-3-(5,6-dihydro-4H-pyrrolo[3,2,1-ij]quinolin-1-yl)-4-(1H-indol-3-yl)-2,5-dioxo-pyrrolidin-1-ylmethyl ester as a solid (70 mg). 1H NMR (DMSO-d6) 400 MHz δ: 11.10 (s, 1H), 7.32-7.39 (m, 12H), 6.84-7.24 (m, 2H), 5.49 (brs, 2H), 5.03 (m, 4H), 4.61 (dd, 2H), 4.06 (brs, 2H), 2.87 (brs, 2H), 2.07 (brs, 2H).

Provenance & Evidence