乙酸酐 、 3-(2-Chloro-ethyl)-1-(2-hydroxy-ethyl)-1-((2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-hydroxymethyl-tetrahydro-pyran-2-yl)-urea 在
吡啶 作用下,
反应 5.0h,
以60%的产率得到Acetic acid (2R,3R,4S,5R,6R)-4,5-diacetoxy-2-[1-(2-acetoxy-ethyl)-3-(2-chloro-ethyl)-ureido]-6-acetoxymethyl-tetrahydro-pyran-3-yl ester