1,2-Dichloroethane → N-t-Butoxycarbonyl-5-[(morpholin-4-yl)carbonyl]isoindoline

Participants

Reaction Steps

A mixture of N-t-butoxycarbonyl-5-carboxyisoindoline (D13) (300 mg), EDC (440 mg), HOAT (10 mg), triethylamine (0.4 ml) and morpholine (0.12 ml) in DCM (10 ml) was stirred overnight and then evaporated. The residue was redissolved in EtOAc (10 ml), washed with saturated NaHCO3 solution (10 ml), water (10 ml), brine (10 ml), dried (MgSO4) and evaporated. The residue was chromatographed on a silica gel flash column [step gradient 70-90% EtOAc in light petroleum 40-60] to give the title compound (D19) (314 mg). MS electrospray (+ion) 333 (MH+). 1H NMR δ (CDCl3): 7.30 (3H, m), 4.70 (2H, m), 4.67 (2H, m), 3.70 (8H, m), 1.52 (9H, s).

Provenance & Evidence