2-ethylbutyl (2S)-2-[[[(2R,3R,4R,5R)-5-(4-amino-2-oxopyrimidin-1-yl)-5-cyano-3,4-dihydroxy-4-methyloxolan-2-yl]methoxy-(4-chlorophenoxy)phosphoryl]amino]propanoate 在
potassium tert-butylate 作用下,
以
二甲基亚砜 为溶剂,
生成
2-ethylbutyl (2S)-2-[[(4aR,6R,7R,7aR)-6-(4-amino-2-oxopyrimidin-1-yl)-6-cyano-7-hydroxy-7-methyl-2-oxo-4a,7a-dihydro-4H-furo[3,2-d][1,3,2]dioxaphosphinin-2-yl]amino]propanoate