(R)-2-[(4-nitrophenyl)sulfonyl-oxy]propanamide 、
5-hydroxy-N,N'-bis[2-hydroxy-1-(hydroxymethyl)ethyl]-2,4,6-triiodo-1,3-benzendicarboxamide sodium salt 在
sodium hydroxide 作用下,
以
1,4-二氧六环 、
水 为溶剂,
以86%的产率得到(S)-5-(2-amino-1-methyl-2-oxoethoxy)-N,N'-bis[2-hydroxy-1-(hydroxymethyl)ethyl]-2,4,6-triiodo-1,3-benzenedicarboxamide