O5,O6-isopropylidene-O8-trityl-D-allo-4,7-anhydro-2,3-dideoxy-oct-2-ynonic acid methyl ester 、
3-重氮基樟脑烷-2-酮 以
苯 为溶剂,
反应 200.0h,
以60%的产率得到methyl (4S,7R)-3-(2,3-O-isopropylidene-5-O-trityl-β-D-ribofuranosyl)-7,10,10-trimethyl-8-oxo-4,5,6,7-tetrahydro-4,7-methano-8H-pyrazolo<1,5-α>azepine-2-carboxylate