Ammonia → HCID 3010391, compound

N-Chlorosuccinimide was added to a solution of 4-chloro-7-(2-acetoxyethoxymethyl)pyrrolo[2,3-d]pyrimidine (3) (0.35 g) in dry methylene chloride (15 mL). The reaction mixture was stirred at room temperature for 8 days. At that time, TLC established a complete disappearance of starting material. Water (50 mL) was added to the mixture and the product was extracted with CHCl3 (3+30 mL). The chloroform extracts were combined and washed with water, then dried over anhydrous Na2SO4. The solvent was removed at 40° C. in vacuo and the resulting thick syrup was subjected to column chromatography. Elution of the silica gel column (15×2 cm) with benzene; chloroform (1:1), yielded a colorless oil (single spot on TLC) after evaporation of all the UV absorbing fractions at a reduced temperature and pressure, which was crystallized from ethyl alcohol to afford colorless needles of the acetylated intermediate, (7a, 0.23 g) (59.95%). 4,5-Dichloro-7-(2-acetoxyethoxymethyl)pyrrolo[2,3-d]pyrimidine (7a, 0.31 g) was then dissolved in dry methanol (15 mL) and to this solution was added methanol which had previously been saturated with ammonia at 0° C. (25 mL). The reaction mixture was stirred in a pressure bottle at room temperature for 20 hours. The solvent was evaporated at 30° C. in vacuo and the semi-solid mass was subjected to column chromatography. Elution of the product from a silica gel column (15×2 cm) with 2% meOH in CHCl3 yielded a colorless compound, after evaporation of all the appropriate UV absorbing fractions.

1. customThe solvent was evaporated at 30° C. in vacuo
2. washElution of the product from a silica gel column (15×2 cm) with 2% meOH in CHCl3
3. customyielded a colorless compound
4. customafter evaporation of all the appropriate UV
5. customabsorbing fractions

ORD record

ord-862b0d34267c43f686814efb5b65da83

Source dataset

uspto-grants-1990_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04968686