2-methyl-2-[5-methyl-6-(1,3-oxazol-2-yl)-2,4-dioxo-1-[(2R)-2-phenyl-2-[3-(2,2,2-trifluoroacetyl)oxycyclohexyl]oxyethyl]thieno[2,3-d]pyrimidin-3-yl]propanoic acid 在
甲醇 、
potassium carbonate 作用下,
以42%的产率得到2-(1-((R)-2-(((1S,3S)-3-hydroxycyclohexyl)oxy)-2-phenylethyl)-5-methyl-6-(oxazol-2-yl)-2,4-dioxo-1,2-dihydrothieno[2,3-d]pyrimidin-3(4H)-yl)-2-methylpropanoic acid