7-((3aR,4R,6S,7aR)-7-Hydroxy-2,2,6-trimethyl-tetrahydro-[1,3]dioxolo[4,5-c]pyran-4-yl)-1,3-dimethyl-3,7-dihydro-purine-2,6-dione 在
3 A molecular sieve 、
pyridinium chlorochromate 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以75%的产率得到1-(6'-deoxy-2',3'-O-isopropylidene-α-L-lyxo-hexopyranos-4'-ulosyl)theophylline