γ-Ketoesters are obtained in excellent yields by means of double bond migration of 2,5-dimethoxy-2,5-dihydrofurans mediated by a ruthenium hydride complex, HRuCl(PPh3)3(C6H5CH3) or HRuCl(CO)(PPh3)3′ and subsequent hydrolysis in acidic media.
                                    γ-
酮酯通过以
铑氢化合物 HRuCl(PPh3)3(C6H5CH3) 或 HRuCl(CO)(PPh3)3 为催化剂的 
2,5-二甲氧基-2,5-二氢呋喃的双键迁移反应获得,随后在酸性介质中
水解,产率极高。