Acetic Anhydride → HCID 13714021, compound

Participants

Reaction Steps

A 100 ml flask equipped with a magnetic stirring bar and a CaCl2 drying tube was charged with 1.0 g (4.4 mM) 2-amino-9-(2-hydroxyethylthiomethyl)-9H-purine, 0.054 g (0.44 mM) 4-dimethylaminopyridine, 0.9 ml (8.8 mM) acetic anhydride, and 200 ml of dry DMF. The solution was stirred for 24 hrs at room temperature and then quenched with 5 ml of MeOH. The solution was evaporated in vacuo (bath temp 40° C.) and the brown oil so obtained chromatographed using the "flash" method. Elution of the column with 1.5% methanol in ethyl acetate provided a yellow oil which crystallized on standing. The light yellow crystals were dissolved in a solution of 2% MeOH in toluene and treated with 0.05 g Darco G-60. The methanol was evaporated from the toluene solution resulting in the precipitation of light yellow crystals. The product was dried for 16 hrs at 78° C. to yield the title compound, mpt. 119°-120.5° C.

Provenance & Evidence