7,8-dihydro-6,6-dimethyl-7-hydroxy-8-(n-(1-oxo-3-t-butyldimethylsilyloxy-4-bromo)butyl)amino-6H-pyrano[2,3-f]benzo-2,1,3-oxadiazole 在
四甲基氢氧化铵 作用下,
以
N-甲基乙酰胺 为溶剂,
生成 7,8-dihydro-6,6-dimethyl-7-hydroxy-8-(2-oxo-4-t-butyldimethylsilyloxy-1-pyrrolidinyl)-6H-pyrano[2,3-f]benzo-2,1,3-oxadiazole