Acetic Anhydride → 1,3-dihydro-3-acetoxy-3-(2-pyridinylmethyl)-1-(4-morpholinyl)-2H-indol-2-one

Participants

Reaction Conditions

Reaction Steps

A mixture of alcohol from Example 26 (63 mg, 0.194 mmole) 4-dimethylaminopyridine (78 mg, 0.639 mmole) , acetic anhydride (0.06 ml, 0.639 mmole) in dichloromethane (10 ml) was stirred at 0° C. for 8 hours. The volatiles were removed and the crude mixture applied directly to a silica gel column and eluted with 5% methanol in chloroform (Rf =0.34). The product slowly crystallized from hexane-ethyl acetate at 0° C. to give 41 mg of colorless cubes, m.p. 107°-110° C. after filtration. IR (KBr): 1702 cm-1. High Res. Mass Spec. Calcd. for C20H21N3O4 : 368.1610 (M+H) . Found: 368.1611.

Provenance & Evidence