ethyl 5-chloro-3-[({[3-(ethyloxy)-3-oxopropyl]amino}carbonyl)amino]-1-[2'-hydroxy-3'-(methyloxy)-4-biphenylyl]-1H-pyrrole-2-carboxylate   、                                                                                      
钠                                                                                                                                                              在
                                                                                                                                                                                 
水   、                                                                                                  
sodium hydroxide   、                                                                                                  
二氯甲烷   、                                                                                                  
乙醇   、                                                                                                  
3-{6-chloro-5-[2'-hydroxy-3'-(methyloxy)-4-biphenylyl]-2,4-dioxo-1,2,4,5-tetrahydro-3H-pyrrolo[3,2-d]pyrimidin-3-yl}propanoic acid                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
乙醇                                                                                  为溶剂,
                                                                                                                                                    反应 2.0h,
                                                                                                                以gave the title compound 3-{6-chloro-5-[2′-hydroxy-3′-(methyloxy)-4-biphenylyl]-2,4-dioxo-1,2,4,5-tetrahydro-3H-pyrrolo[3,2-d]pyrimidin-3-yl}propanoic acid (430 mg, 0.94 mmol, 46.3% yield) as a cream solid的产率得到3-{6-chloro-5-[2'-hydroxy-3'-(methyloxy)-4-biphenylyl]-2,4-dioxo-1,2,4,5-tetrahydro-3H-pyrrolo[3,2-d]pyrimidin-3-yl}propanoic acid