N-[(2S,3S,4aS,5R,7S,8R,8aR)-2,3-diethoxy-5-(hydroxymethyl)-2,3-dimethyl-7-(2-phenylethoxy)-5,7,8,8a-tetrahydro-4aH-pyrano[3,4-b][1,4]dioxin-8-yl]pent-4-enamide 在
吡啶 、
pyridine-SO3 complex 作用下,
反应 1.0h,
生成 [(2S,3S,4aS,5R,7S,8R,8aR)-2,3-diethoxy-2,3-dimethyl-8-(pent-4-enoylamino)-7-(2-phenylethoxy)-5,7,8,8a-tetrahydro-4aH-pyrano[3,4-b][1,4]dioxin-5-yl]methyl hydrogen sulfate