反应详情

A mixture of 10 g of 4-chloro-7-(2,3,5-tri-O-benzyl-β-D-arabinofuranosyl)-7H-pyrrolo[2,3-d]pyrimidine and 100 ml of anhydrous hydrazine is heated under reflux and a nitrogen atmosphere for one hour, evaporated in vacuo, and coevaporated with xylenes. The residue is distributed between a mixture of ethyl acetate and water. The aqueous layer is reextracted with ethyl acetate and the dried ethyl acetate solution is evaporated in vacuo to provide 9.0 g of crude product. Purification of this material by silica gel chromatography (ethyl acetate) provides pure 4-hydrazino-7-(2,3,5-tri-O-benzyl-β-D-arabinofuranosyl)-7H-pyrrolo[2,3-d]pyrimidine as a yellow syrup.

1. temperatureis heated
2. temperatureunder reflux
3. customevaporated in vacuo
4. additionThe residue is distributed between a mixture of ethyl acetate and water
5. customthe dried ethyl acetate solution is evaporated in vacuo
6. customto provide 9.0 g of crude product
7. customPurification of this material by silica gel chromatography (ethyl acetate)