Dimethylformamide → HCID 178444031, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of diethyl 3-bromo-3(1-trityl-1,2,4-triazol-3-yl)propane phosphonate (1.05 g, prepared as described in Example 29), sodium azide (0.60 g), 15-Crown-5 (0.02 g), water (1.2 ml) and N,N-dimethylformamide (10 ml) was heated at 100° C. for five hours, cooled, poured into water, and extracted with ethyl acetate. The extracts were washed with water and brine, dried over magnesium sulphate, and evaporated under reduced pressure. The residue was chromatographed on silica, using dichloromethane-ethanol (49:1) as eluant, to give diethyl 3-azido-3(1-trityl-1,2,4-triazol-3-yl)propane phosphonate (0.64 g, m.p. 82-84° C.). NMR (CDCl3): δ 1.3(6H,dt), 1.6-2.0(2H,m), 2.2-2.3(2H,m), 4.1(4H,m), 4.65(1H,t), 7.1(6H,m), 7.3(9H,m), 8.0(1H,s). M/S: MH+ 531.

Provenance & Evidence