论文部分内容阅读
1,4-anhydro-2-triflyl-3,5-O-benzenylidene-L-xylitol (5) was constructed in six steps from protected D-xylose. Substitution of 5 with protected 8-bromoinosine 6 gave the key intermediate 5′-O-TBS-2′,3′-di-O-acetyl-N'-(2'-deoxy- 1',4'-anhydr