Sodium hydride → 4-chloro-7-(2,3,5-tri-O-benzyl-beta-D-arabinofuranosyl)-7H-pyrrolo[2,3-d]pyrimidine

Participants

Reaction Conditions

Reaction Steps

A suspension of 240 mg of sodium hydride, 1.54 g of 4-chloro-7H-pyrrolo[2,3-d]pyrimidine, and 6 ml of dry dimethyl-formamide (DMF) is stirred at 50° C. for 15 minutes, cooled, and added to 4.83 g of 2,3,5-tri-O-benzyl-α-D-arabinofuranosyl chloride in 4 ml of DMF. The solution is stirred at ambient temperature for two hours, concentrated in vacuo, and distributed between a mixture of ethyl acetate-water. Chromatography of the dried ethyl acetate layer over silica gel with 4:1 benzene-ethyl acetate provides 3.3 g of yellow, syrupy 4-chloro-7-(2,3,5-tri-O-benzyl-β-D-arabinofuranosyl)-7H-pyrrolo[2,3-d]pyrimidine.

Provenance & Evidence